.w3lab-page{--lab-bg:#071019;--lab-ink:#f7fbff;--lab-muted:#a8b8c8;--lab-dim:#728498;--lab-panel:rgba(12,22,34,0.92);--lab-panel-soft:rgba(18,31,47,0.78);--lab-line:rgba(135,206,255,0.18);--lab-line-strong:rgba(135,206,255,0.38);--lab-code:#070d15;--lab-cyan:#66e4ff;--lab-mint:#75f0a0;--lab-gold:#ffd166;--lab-red:#ff6b8a;--lab-violet:#a48cff;--lab-void:#050708;--lab-mint-bright:#b3f7cb;--lab-mint-deep:#14b84d;--lab-cyan-bright:#abf0ff;--lab-cyan-deep:#129cba;--lab-gold-bright:#ffe6ab;--lab-gold-deep:#ba8712;--lab-red-bright:#ffaebf;--lab-red-deep:#ba1235;--lab-violet-bright:#cdc0ff;--lab-violet-deep:#3512ba;--lab-radius:8px;--lab-sans:var(--font-primary,"Manrope",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif);--lab-display:var(--font-display,"Sora",var(--lab-sans));--lab-heading:var(--lab-sans);--lab-mono:var(--font-mono,"JetBrains Mono","SFMono-Regular",Menlo,Monaco,Consolas,monospace);background:radial-gradient(circle at 14% 8%,rgba(117,240,160,0.15),transparent 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rgba(255,255,255,0.18);border-radius:12px;content:"";inset:3px;opacity:0.8;position:absolute;z-index:2}.w3lab-brand>span:first-child::after{background:linear-gradient(90deg,transparent,rgba(255,255,255,0.5),transparent);content:"";height:1px;left:7px;position:absolute;right:7px;top:9px;z-index:3}.w3lab-brand>span:first-child img{display:block;height:100%;object-fit:cover;position:relative;width:100%;z-index:1}.w3lab-brand strong{color:var(--lab-ink);display:grid;font:850 1.02rem/1 var(--lab-heading);gap:4px;letter-spacing:0;white-space:nowrap}.w3lab-brand strong::after{color:var(--lab-dim);content:"SCH CTF Arena";font:900 0.58rem/1 var(--lab-mono);letter-spacing:0.1em;text-transform:uppercase}.w3lab-hud{align-items:center;background:linear-gradient(90deg,rgba(102,228,255,0.09),rgba(117,240,160,0.05) 48%,rgba(255,209,102,0.055)),rgba(7,16,25,0.88);border:1px solid rgba(135,206,255,0.16);border-radius:var(--lab-radius);box-shadow:0 14px 34px rgba(0,0,0,0.18),inset 0 1px 0 rgba(255,255,255,0.055);display:grid;gap:20px;grid-template-columns:330px minmax(260px,1fr) minmax(260px,286px);min-height:76px;max-width:100%;min-width:0;padding:10px 16px;position:relative}.w3lab-mission-copy{min-width:0;padding-left:8px;padding-right:12px}.w3lab-track-row{align-items:center;display:inline-flex;gap:14px;min-height:54px;min-width:0;width:100%}.w3lab-ethernaut-mark{align-items:center;background:linear-gradient(180deg,rgba(255,230,171,0.98),rgba(255,230,171,0.94));border:1px solid rgba(255,209,102,0.28);border-radius:999px;box-shadow:inset 0 1px 0 rgba(255,255,255,0.62);display:inline-flex;flex:0 0 auto;height:20px;justify-content:center;overflow:hidden;padding:3px 8px;width:78px}.w3lab-ethernaut-mark img{display:block;height:100%;object-fit:contain;width:100%}.w3lab-mission-summary{display:grid;gap:7px;flex:1 1 auto;min-width:0}.w3lab-mission-summary>span{color:var(--lab-dim);font:900 0.56rem/1 var(--lab-mono);letter-spacing:0.16em;white-space:nowrap}.w3lab-hud 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rgba(117,240,160,0.22);z-index:125}.w3lab-hp-token{display:block;height:44px;position:relative;width:44px;z-index:2}.w3lab-token-copy{align-content:center;display:grid;gap:5px;min-width:0;overflow:hidden;position:relative;z-index:2}.w3lab-scorebar strong{color:var(--lab-gold);font:900 0.92rem/1 var(--lab-mono);white-space:nowrap}.w3lab-scorebar .w3lab-token-balance strong{color:var(--lab-mint);font-size:1.08rem;letter-spacing:0.03em;text-shadow:0 0 12px rgba(117,240,160,0.28),0 0 18px rgba(255,209,102,0.1)}.w3lab-token-balance small{color:rgba(171,240,255,0.72);font-size:0.58rem;letter-spacing:0.07em}.w3lab-metric-tip{position:relative}.w3lab-metric-tip::before,.w3lab-metric-help{left:50%;opacity:0;pointer-events:none;position:absolute;transform:translateX(-50%) translateY(-3px);transition:opacity 140ms ease,transform 140ms ease,visibility 140ms ease;visibility:hidden;z-index:130}.w3lab-metric-tip::before{background:rgba(135,206,255,0.28);clip-path:polygon(50% 0,100% 100%,0 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a{background:transparent;border:0;border-radius:8px;color:var(--lab-ink);display:inline-flex;align-items:center;justify-content:center;font-size:0.78rem;font-weight:850;min-height:36px;min-width:68px;padding:0 12px;transition:background 180ms ease,border-color 180ms ease,color 180ms ease,transform 180ms ease}.w3lab-topbar-actions a+a{box-shadow:-1px 0 0 rgba(135,206,255,0.08)}.w3lab-logout-form{border-left:1px solid rgba(135,206,255,0.1);display:contents}.w3lab-topbar-actions button{cursor:pointer;font-family:inherit}.w3lab-dev-menu{display:flex;min-height:36px;position:relative}.w3lab-dev-menu summary{box-sizing:border-box;color:var(--lab-mint);font:900 0.68rem/1 var(--lab-mono);letter-spacing:0.05em;list-style:none;min-width:88px;text-transform:uppercase}.w3lab-dev-menu summary::-webkit-details-marker{display:none}.w3lab-dev-menu summary::before{color:var(--lab-gold);content:"DEV";font-size:0.55rem;margin-right:7px}.w3lab-dev-menu summary::after{border-left:4px solid 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rgba(102,228,255,0.08);color:var(--lab-bg);display:inline-flex;flex:0 0 auto;font:950 0.74rem/1 var(--lab-heading);height:34px;justify-content:center;overflow:hidden;width:34px}.w3lab-avatar img{display:block;height:100%;object-fit:cover;width:100%}.w3lab-daily-claim-marker{align-items:center;background:var(--lab-red);border:0;border-radius:999px;box-shadow:none;color:#ffffff;display:inline-flex;font:900 0.72rem/1 var(--lab-sans);height:20px;justify-content:center;min-width:20px;pointer-events:none;position:absolute;right:7px;top:50%;transform:translateY(-50%);width:20px;z-index:2}.w3lab-daily-claim-marker[hidden]{display:none}.w3lab-account-menu.has-daily-claim summary{border-color:rgba(255,107,138,0.34);box-shadow:inset 0 0 0 1px rgba(255,107,138,0.08),0 0 18px rgba(255,107,138,0.08)}.w3lab-account-menu.has-daily-claim .w3lab-avatar{box-shadow:0 0 0 3px rgba(255,107,138,0.1),0 0 18px rgba(255,107,138,0.12)}.w3lab-avatar.is-large{height:54px;width:54px}.w3lab-avatar.is-hero{box-shadow:0 18px 50px rgba(102,228,255,0.2),0 0 0 7px rgba(102,228,255,0.08);height:90px;width:90px}.w3lab-account-copy{display:grid;gap:2px;min-width:0;text-align:left}.w3lab-account-copy strong{color:var(--lab-ink);font:900 0.78rem/1.05 var(--lab-sans);max-width:9rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3lab-account-copy small{color:var(--lab-dim);font:850 0.54rem/1 var(--lab-mono);text-transform:uppercase}.w3lab-account-panel{background:radial-gradient(circle at 10% 0%,rgba(102,228,255,0.1),transparent 10rem),radial-gradient(circle at 100% 34%,rgba(117,240,160,0.08),transparent 12rem),linear-gradient(180deg,rgba(7,16,25,0.995),rgba(7,13,21,0.995));border:1px solid rgba(135,206,255,0.26);border-radius:12px;box-shadow:0 28px 80px rgba(0,0,0,0.58),0 0 0 1px rgba(255,255,255,0.035),inset 0 1px 0 rgba(255,255,255,0.07);display:grid;gap:8px;max-height:min(620px,calc(100vh - 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.w3lab-account-close:focus-visible{background:rgba(102,228,255,0.14);border-color:rgba(102,228,255,0.34);color:var(--lab-ink)}.w3lab-account-card{align-items:center;display:grid;gap:10px;grid-template-columns:auto minmax(0,1fr);min-width:0;padding:2px 36px 0 2px}.w3lab-account-card strong{color:var(--lab-ink);display:block;font:900 0.96rem/1.1 var(--lab-sans);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3lab-account-card small{color:var(--lab-muted);display:block;font:760 0.72rem/1.3 var(--lab-sans);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3lab-rank-card{background:linear-gradient(135deg,rgba(255,209,102,0.13),rgba(117,240,160,0.075) 54%,rgba(102,228,255,0.055)),rgba(255,255,255,0.035);border:1px solid rgba(255,209,102,0.24);border-radius:10px;display:grid;gap:9px;padding:12px}.w3lab-rank-card div{align-items:baseline;display:flex;gap:8px;justify-content:space-between}.w3lab-rank-card>div>span:first-child{color:var(--lab-dim);font:850 0.58rem/1 var(--lab-mono);text-transform:uppercase}.w3lab-rank-card strong{color:var(--lab-gold);font:950 1.02rem/1.05 var(--lab-heading);text-align:right}.w3lab-rank-card small{color:var(--lab-muted);font:750 0.76rem/1.25 var(--lab-sans)}.w3lab-level-track{align-items:center;display:grid;gap:13px;grid-template-columns:minmax(0,1fr) max-content;min-width:0;width:100%}.w3lab-level-track-bar,.w3profile-level-track{background:linear-gradient(180deg,rgba(255,255,255,0.045),transparent 60%),rgba(7,13,21,0.78);border:1px solid rgba(135,206,255,0.16);border-radius:999px;box-shadow:inset 0 0 0 1px rgba(0,0,0,0.32),inset 0 -6px 12px rgba(0,0,0,0.22);display:block;height:9px;overflow:hidden;position:relative;width:100%}.w3lab-level-track-bar>span,.w3profile-level-track>span{background:linear-gradient(90deg,var(--lab-gold),var(--lab-mint),var(--lab-cyan));border-radius:inherit;box-shadow:0 0 18px rgba(102,228,255,0.18);display:block;height:100%;width:0}.w3lab-level-track em{color:rgba(255,230,171,0.88);font:950 0.66rem/1 var(--lab-mono);font-style:normal;letter-spacing:0.08em;min-width:34px;pointer-events:none;text-align:right;text-shadow:0 1px 2px rgba(0,0,0,0.9),0 0 10px rgba(255,209,102,0.16);white-space:nowrap}.w3lab-rank-card .w3lab-level-track-bar{height:12px}.is-level-progress-0{width:0 !important}.is-level-progress-10{width:10% !important}.is-level-progress-20{width:20% !important}.is-level-progress-30{width:30% !important}.is-level-progress-40{width:40% !important}.is-level-progress-50{width:50% !important}.is-level-progress-60{width:60% !important}.is-level-progress-70{width:70% !important}.is-level-progress-80{width:80% !important}.is-level-progress-90{width:90% !important}.is-level-progress-100{width:100% !important}.w3lab-account-stats{display:grid;gap:9px;grid-template-columns:repeat(3,minmax(0,1fr))}.w3lab-daily-card,.w3lab-referral-card{align-items:center;background:linear-gradient(135deg,rgba(117,240,160,0.1),rgba(102,228,255,0.065)),rgba(255,255,255,0.045);border:1px solid rgba(117,240,160,0.18);border-radius:10px;display:grid;gap:12px;grid-template-columns:minmax(0,1fr) auto;min-height:54px;padding:9px 10px}.w3lab-daily-card.is-claimable{animation:w3lab-claim-pulse 2.8s ease-in-out infinite;border-color:rgba(117,240,160,0.36)}.w3lab-daily-card strong,.w3lab-referral-card strong{color:var(--lab-ink);display:block;font:900 0.82rem/1.1 var(--lab-heading)}.w3lab-daily-card .w3lab-daily-card-title{align-items:center;display:inline-flex;gap:8px;min-width:0}.w3lab-daily-card-marker{align-items:center;background:var(--lab-red);border:0;border-radius:999px;box-shadow:none;color:#ffffff;display:inline-flex;flex:0 0 auto;font:900 0.72rem/1 var(--lab-sans);height:20px;justify-content:center;min-width:20px;position:relative;width:20px}.w3lab-daily-card-marker[hidden]{display:none}.w3lab-daily-card small,.w3lab-referral-card small{color:var(--lab-muted);display:block;font:780 0.68rem/1.2 var(--lab-sans);margin-top:5px}.w3lab-daily-card button,.w3lab-referral-card button{background:linear-gradient(135deg,var(--lab-mint-deep) 0%,var(--lab-cyan-deep) 100%);border:1px solid rgba(102,228,255,0.5);border-radius:999px;color:#ffffff;cursor:pointer;font:950 0.7rem/1 var(--lab-mono);min-height:36px;min-width:86px;padding:0 14px;text-shadow:0 1px 8px rgba(7,13,21,0.5);white-space:nowrap;transition:all 0.2s ease}.w3lab-daily-card button:hover:not(:disabled){background:linear-gradient(135deg,var(--lab-mint-deep) 0%,var(--lab-cyan-deep) 100%);border-color:rgba(255,255,255,0.42);box-shadow:0 12px 30px rgba(20,184,77,0.3),0 0 40px rgba(102,228,255,0.26);transform:translateY(-2px)}.w3lab-daily-card button:active:not(:disabled){transform:translateY(0);box-shadow:0 4px 12px rgba(102,228,255,0.16)}.w3lab-referral-card button:hover:not(:disabled){background:rgba(255,209,102,0.24);border-color:rgba(255,209,102,0.52);box-shadow:0 8px 24px rgba(255,209,102,0.2);transform:translateY(-2px)}.w3lab-referral-card button:active:not(:disabled){transform:translateY(0);box-shadow:0 4px 12px rgba(255,209,102,0.12)}.w3lab-daily-card button:disabled,.w3lab-referral-card button:disabled{background:rgba(255,255,255,0.08);border-color:rgba(135,206,255,0.18);color:rgba(255,255,255,0.48);cursor:default}.w3lab-referral-card{background:linear-gradient(135deg,rgba(255,209,102,0.11),rgba(102,228,255,0.055)),rgba(255,255,255,0.045);border-color:rgba(255,209,102,0.18);grid-template-columns:minmax(0,1fr) minmax(112px,auto)}.w3lab-referral-card button{background:rgba(255,209,102,0.12);border-color:rgba(255,209,102,0.28);color:var(--lab-gold);min-width:112px;text-shadow:none}.w3lab-referral-card small{align-items:center;display:flex;gap:7px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3lab-referral-card .w3hp-amount{background:rgba(255,209,102,0.08);border:1px solid rgba(255,209,102,0.18);border-radius:999px;color:var(--lab-gold);font:900 0.62rem/1 var(--lab-mono);gap:0.25em;padding:3px 7px 3px 4px}.w3lab-referral-card .w3hp-amount::before{height:1.15em;width:1.15em}.w3lab-account-stats>span{background:rgba(255,255,255,0.04);border:1px solid rgba(135,206,255,0.14);border-radius:8px;display:grid;gap:4px;justify-items:center;min-height:58px;padding:10px;text-align:center}.w3lab-account-stats strong{align-items:center;color:var(--lab-gold);display:flex;font:900 0.78rem/1 var(--lab-mono);justify-content:center;min-height:1.35em;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3lab-account-stats small{color:var(--lab-dim);font:850 0.5rem/1 var(--lab-mono);line-height:1.15;min-width:0;overflow-wrap:anywhere;text-transform:uppercase}.w3lab-account-link,.w3lab-account-logout button{background:rgba(255,255,255,0.025);border:1px solid rgba(135,206,255,0.16) !important;border-radius:999px !important;min-height:40px;width:100%}.w3lab-account-link.is-tour-link{background:rgba(117,240,160,0.055);border-color:rgba(117,240,160,0.18) !important;color:var(--lab-mint-bright);min-height:38px}button.w3lab-account-link{cursor:pointer;font-family:inherit}.w3lab-account-logout{display:contents}.w3lab-account-logout button{background:rgba(255,107,138,0.045);border-color:rgba(255,107,138,0.18) !important;color:var(--lab-red-bright)}.w3lab-stage{display:grid;gap:16px;grid-template-columns:300px minmax(640px,1fr) 360px;min-height:calc(100vh - 72px);padding:16px;position:relative;z-index:1}.w3lab-side,.w3lab-main,.w3lab-control{min-width:0}.w3lab-side,.w3lab-main,.w3lab-control{display:grid;gap:14px}.w3lab-side{align-content:start}.w3lab-main{grid-template-rows:auto auto minmax(500px,1fr) minmax(150px,0.22fr)}.w3lab-control{align-content:start}.w3lab-mission-card,.w3lab-map-card,.w3lab-task-strip,.w3lab-chain,.w3lab-code-card,.w3lab-console,.w3lab-panel,.w3lab-after,.w3lab-context{background:linear-gradient(180deg,rgba(18,156,186,0.94),rgba(7,16,25,0.94)),radial-gradient(circle at 100% 0%,rgba(102,228,255,0.08),transparent 15rem);border:1px solid var(--lab-line);border-radius:var(--lab-radius);box-shadow:0 18px 54px rgba(0,0,0,0.26),inset 0 1px 0 rgba(255,255,255,0.045)}.w3lab-mission-card{background:linear-gradient(160deg,rgba(117,240,160,0.12),rgba(102,228,255,0.07) 44%,rgba(18,156,186,0.96)),rgba(18,156,186,0.96);border-color:rgba(117,240,160,0.28);padding:22px}.w3lab-kicker{color:var(--lab-cyan);font:900 0.7rem/1.2 var(--lab-mono);letter-spacing:0.08em;margin:0 0 9px;text-transform:uppercase}.w3lab-mission-card h1,.w3lab-task-strip h2,.w3lab-panel h2,.w3lab-map-card h2,.w3lab-after h2{color:var(--lab-ink);font-family:var(--lab-heading);font-weight:800;letter-spacing:0;line-height:1.1;margin:0}.w3lab-mission-card h1{font-size:clamp(1.65rem,1.78vw,2.18rem);max-width:12ch}.w3lab-mission-card p,.w3lab-after p,.w3lab-panel p{color:var(--lab-muted);line-height:1.55}.w3lab-mission-card p{margin:12px 0 0}.w3lab-reward-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.w3lab-reward-row span{background:rgba(255,255,255,0.075);border:1px solid rgba(117,240,160,0.22);border-radius:999px;color:var(--lab-mint);font-size:0.74rem;font-weight:900;padding:7px 9px}.w3lab-map-card,.w3lab-panel{padding:16px}.w3lab-card-head h2{font-size:1.12rem;line-height:1.15}.w3lab-level-list{display:grid;gap:9px;margin-top:14px}.w3lab-level-card{background:rgba(255,255,255,0.05);border:1px solid rgba(135,206,255,0.16);border-radius:var(--lab-radius);color:var(--lab-ink);cursor:pointer;display:grid;gap:4px;grid-template-columns:34px minmax(0,1fr);min-height:68px;padding:12px;text-align:left;transition:background 180ms ease,border-color 180ms ease,transform 180ms ease}.w3lab-level-card:hover,.w3lab-level-card.is-active{background:rgba(102,228,255,0.11);border-color:rgba(102,228,255,0.42);transform:translateY(-1px)}.w3lab-level-card.is-locked{opacity:0.72}.w3lab-level-card span{color:var(--lab-gold);font:900 0.8rem/1 var(--lab-mono);grid-row:1 / 3}.w3lab-level-card strong{font:800 0.96rem/1.15 var(--lab-heading);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3lab-level-card small{color:var(--lab-muted);font-weight:750}.w3lab-task-strip{align-items:center;display:flex;gap:14px;justify-content:space-between;padding:18px 20px}.w3lab-task-strip h2{font-size:clamp(1.65rem,2.05vw,2.45rem);max-width:22ch}.w3lab-chain{align-items:stretch;display:grid;gap:10px;grid-template-columns:minmax(0,1.08fr) minmax(0,1fr) minmax(0,0.92fr);padding:12px}.w3lab-chain-node{background:rgba(255,255,255,0.05);border:1px solid rgba(135,206,255,0.13);border-radius:var(--lab-radius);display:grid;gap:4px;grid-template-columns:34px minmax(0,1fr);padding:11px;transition:background 180ms ease,border-color 180ms ease,box-shadow 180ms ease,transform 180ms ease}.w3lab-chain-node span{align-items:center;background:rgba(135,206,255,0.09);border:1px solid rgba(135,206,255,0.18);border-radius:50%;color:var(--lab-muted);display:inline-flex;font:900 0.68rem/1 var(--lab-mono);grid-row:1 / 3;height:28px;justify-content:center;width:28px}.w3lab-chain-node strong{color:var(--lab-ink);font:800 0.86rem/1.15 var(--lab-heading)}.w3lab-chain-node small{color:var(--lab-muted);font-weight:800}.w3lab-chain-node.is-current{background:rgba(102,228,255,0.09);border-color:rgba(102,228,255,0.36);box-shadow:inset 0 0 0 1px rgba(102,228,255,0.08),0 12px 30px rgba(102,228,255,0.07)}.w3lab-chain-node.is-current span{background:rgba(102,228,255,0.18);border-color:rgba(102,228,255,0.42);color:var(--lab-cyan)}.w3lab-chain-node.is-complete{background:rgba(117,240,160,0.09);border-color:rgba(117,240,160,0.32)}.w3lab-chain-node.is-complete span{background:rgba(117,240,160,0.18);border-color:rgba(117,240,160,0.42);color:var(--lab-mint)}.w3lab-code-card{background:var(--lab-code);display:grid;grid-template-rows:auto auto minmax(0,1fr);min-height:0;overflow:hidden}.w3lab-code-tabs{background:rgba(255,255,255,0.04);border-bottom:1px solid rgba(135,206,255,0.15);display:flex;gap:9px;overflow-x:auto;padding:12px}.w3lab-code-tabs button,.w3lab-run,.w3lab-move-grid button{border-radius:999px;cursor:pointer;font-weight:900;transition:background 180ms ease,border-color 180ms ease,color 180ms ease,transform 180ms ease,box-shadow 180ms ease}.w3lab-code-tabs button{background:rgba(255,255,255,0.07);border:1px solid rgba(135,206,255,0.2);color:var(--lab-muted);padding:10px 15px}.w3lab-code-tabs button.is-active{background:rgba(102,228,255,0.14);border-color:rgba(102,228,255,0.48);color:var(--lab-ink)}.w3lab-code-scroll{display:none;min-height:0;overflow:auto}.w3lab-code-scroll.is-active{display:block}.w3lab-code-scroll pre{margin:0;min-width:720px;padding:22px 26px 34px}.w3lab-code-scroll code{color:var(--lab-cyan-bright);font-family:var(--lab-mono);font-size:0.88rem;line-height:1.72}.c-muted{color:var(--lab-dim)}.w3lab-code-scroll .tok-comment,.w3lesson-editor-highlight .tok-comment{color:#6d8396;font-style:italic}.w3lab-code-scroll .tok-keyword,.w3lesson-editor-highlight .tok-keyword{color:#66e4ff;font-weight:900}.w3lab-code-scroll .tok-type,.w3lesson-editor-highlight .tok-type{color:#a48cff;font-weight:850}.w3lab-code-scroll .tok-builtin,.w3lesson-editor-highlight .tok-builtin{color:#75f0a0;font-weight:850}.w3lab-code-scroll .tok-fn,.w3lesson-editor-highlight .tok-fn{color:#ffd166;font-weight:850}.w3lab-code-scroll .tok-string,.w3lesson-editor-highlight .tok-string{color:#ffb4c5}.w3lab-code-scroll .tok-number,.w3lesson-editor-highlight .tok-number{color:#f6dd8f}.w3lab-code-scroll .tok-unit,.w3lesson-editor-highlight .tok-unit{color:#ffdc7c;font-weight:850}.w3lab-code-scroll .tok-op,.w3lesson-editor-highlight .tok-op{color:#8fe9ff}.w3lab-console{background:var(--lab-bg);display:grid;grid-template-rows:auto minmax(0,1fr);min-height:0;overflow:hidden}.w3lab-console-head{align-items:center;border-bottom:1px solid rgba(135,206,255,0.14);display:flex;gap:7px;min-height:40px;padding:0 14px}.w3lab-console-head span{background:var(--lab-red);border-radius:50%;height:8px;width:8px}.w3lab-console-head span:nth-child(2){background:var(--lab-gold)}.w3lab-console-head span:nth-child(3){background:var(--lab-mint)}.w3lab-console-head strong{color:var(--lab-dim);font:900 0.76rem/1 var(--lab-mono);margin-left:6px}#w3lab-log{color:var(--lab-muted);font-family:var(--lab-mono);font-size:0.8rem;line-height:1.48;margin:0;overflow:auto;padding:14px 18px 18px 32px}#w3lab-log[hidden]{display:none}#w3lab-log li+li{margin-top:7px}#w3lab-log .is-good{color:var(--lab-mint)}#w3lab-log .is-warn{color:var(--lab-gold)}#w3lab-log .is-bad{color:var(--lab-red)}.w3lab-objectives{display:grid;gap:9px;margin-top:13px}.w3lab-objectives label{align-items:center;background:rgba(255,255,255,0.055);border:1px solid rgba(135,206,255,0.13);border-radius:var(--lab-radius);color:var(--lab-muted);display:flex;gap:10px;min-height:46px;padding:10px 12px}.w3lab-objectives input{accent-color:var(--lab-mint)}.w3lab-move-grid{display:grid;gap:10px;margin-top:13px}.w3lab-move-grid button{align-items:center;background:rgba(255,255,255,0.06);border:1px solid rgba(135,206,255,0.17);color:var(--lab-ink);display:grid;gap:3px 10px;grid-template-columns:34px minmax(0,1fr) auto;padding:12px;text-align:left}.w3lab-move-grid button:hover{background:rgba(117,240,160,0.1);border-color:rgba(117,240,160,0.42);box-shadow:0 10px 26px rgba(117,240,160,0.08);transform:translateY(-2px)}.w3lab-move-grid span{align-items:center;background:rgba(117,240,160,0.12);border:1px solid rgba(117,240,160,0.24);border-radius:50%;color:var(--lab-mint);display:inline-flex;font:900 0.75rem/1 var(--lab-mono);grid-row:1 / 3;height:30px;justify-content:center;width:30px}.w3lab-move-grid strong{font:800 0.95rem/1.15 var(--lab-mono)}.w3lab-move-grid small{color:var(--lab-muted)}.w3lab-move-grid em{align-self:center;background:rgba(255,209,102,0.1);border:1px solid rgba(255,209,102,0.22);border-radius:999px;color:var(--lab-gold);font:900 0.62rem/1 var(--lab-mono);font-style:normal;grid-column:3;grid-row:1 / 3;padding:6px 8px;text-transform:uppercase}.w3lab-move-grid button.is-current{background:rgba(102,228,255,0.11);border-color:rgba(102,228,255,0.5);box-shadow:0 16px 38px rgba(102,228,255,0.08)}.w3lab-move-grid button.is-complete{background:rgba(117,240,160,0.09);border-color:rgba(117,240,160,0.36)}.w3lab-move-grid button.is-complete em{background:rgba(117,240,160,0.12);border-color:rgba(117,240,160,0.3);color:var(--lab-mint)}.w3lab-move-grid button.is-locked{opacity:0.72}.w3lab-advanced-call{margin-top:12px}.w3lab-advanced-call summary,.w3lab-panel summary{color:var(--lab-ink);cursor:pointer;font-weight:800;list-style:none}.w3lab-advanced-call summary{color:var(--lab-muted);font-size:0.86rem}.w3lab-advanced-call summary::-webkit-details-marker,.w3lab-panel summary::-webkit-details-marker{display:none}.w3lab-form-grid{display:grid;gap:9px;margin-top:12px}.w3lab-form-grid label{color:var(--lab-dim);font:900 0.68rem/1 var(--lab-mono);text-transform:uppercase}.w3lab-form-grid select{appearance:none;background:rgba(7,13,21,0.98);border:1px solid rgba(135,206,255,0.2);border-radius:var(--lab-radius);color:var(--lab-ink);font:850 0.95rem/1.3 var(--lab-sans);min-height:44px;padding:0 12px;width:100%}.w3lab-run{background:linear-gradient(135deg,var(--lab-mint),var(--lab-cyan));border:1px solid rgba(102,228,255,0.55);color:var(--lab-bg);min-height:46px;position:relative}.w3lab-run:hover{transform:translateY(-2px)}.w3lab-run:disabled{cursor:wait;opacity:0.92;transform:none}.w3lab-run.is-checking{animation:w3lab-run-pulse 1100ms ease-in-out infinite;background:linear-gradient(90deg,rgba(255,209,102,0.92),rgba(117,240,160,0.96),rgba(102,228,255,0.94)),var(--lab-cyan);background-size:220% 100%;box-shadow:0 0 28px rgba(102,228,255,0.24)}.w3lesson-console.is-flashing,.w3lab-exp.is-flashing{animation:w3lab-flash 520ms ease}.w3lab-badges{display:grid;gap:8px;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:13px}.w3lab-badges span{background:rgba(255,255,255,0.045);border:1px solid rgba(135,206,255,0.12);border-radius:var(--lab-radius);color:var(--lab-dim);font:900 0.68rem/1 var(--lab-mono);padding:10px 7px;text-align:center;text-transform:uppercase}.w3lab-badges span.is-earned{background:rgba(117,240,160,0.12);border-color:rgba(117,240,160,0.32);box-shadow:inset 0 0 0 1px rgba(117,240,160,0.08);color:var(--lab-mint)}.w3lab-panel details{background:rgba(255,255,255,0.05);border:1px solid rgba(135,206,255,0.13);border-radius:var(--lab-radius);margin-top:9px}.w3lab-panel details summary{padding:12px}.w3lab-panel details p{border-top:1px solid rgba(135,206,255,0.12);margin:0;padding:0 12px 12px}.w3lab-after{margin:0 16px 16px;padding:clamp(20px,3vw,32px);position:relative;z-index:1}.w3lab-after{align-items:center;display:grid;gap:22px;grid-template-columns:minmax(0,1fr) minmax(280px,0.42fr)}.w3lab-after h2{font-size:clamp(1.5rem,2.15vw,2.35rem)}.w3lab-next-links{display:grid;gap:10px}.w3lab-next-links a{border-radius:var(--lab-radius);text-align:center}.w3lab-context{margin:0 16px 16px;overflow:clip;position:relative;z-index:1}.w3lab-context>summary{align-items:center;cursor:pointer;display:grid;gap:18px;grid-template-columns:minmax(0,1fr) 32px;list-style:none;min-height:72px;padding:14px 18px}.w3lab-context>summary::-webkit-details-marker{display:none}.w3lab-context-heading{display:grid;gap:5px;min-width:0}.w3lab-context-heading strong{color:var(--lab-ink);font:850 1rem/1.2 var(--lab-heading)}.w3lab-context-heading small{color:var(--lab-dim);font:800 0.66rem/1.25 var(--lab-mono);letter-spacing:0.045em;text-transform:uppercase}.w3lab-context-toggle{background:rgba(102,228,255,0.055);border:1px solid rgba(102,228,255,0.22);border-radius:8px;height:32px;position:relative;transition:background 160ms ease,border-color 160ms 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var(--lab-heading);letter-spacing:0;margin:0;position:relative;text-shadow:none;transform-origin:center;white-space:nowrap}.w3lab-level-up-title::before,.w3lab-level-up-title::after{background:linear-gradient(90deg,transparent,rgba(255,230,171,0.92),rgba(102,228,255,0.72),transparent);content:"";height:2px;left:50%;position:absolute;top:50%;transform:translate(-50%,-50%) scaleX(0);width:min(440px,92vw);z-index:-1}.w3lab-level-up-title::after{height:1px;opacity:0.78;transform:translate(-50%,calc(-50%+16px)) scaleX(0)}.w3lab-level-up-celebration.is-playing .w3lab-level-up-title::before{animation:w3lab-level-up-slash 980ms ease-out 160ms both}.w3lab-level-up-celebration.is-playing .w3lab-level-up-title::after{animation:w3lab-level-up-slash 980ms ease-out 260ms both}.w3lab-level-up-kicker{background:rgba(7,13,21,0.72);border:1px solid rgba(255,209,102,0.36);border-radius:999px;box-shadow:0 0 24px rgba(255,209,102,0.12),inset 0 1px 0 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strong{color:var(--lab-ink);display:block;font:950 1rem/1 var(--lab-heading)}.w3profile-progress-note{color:var(--lab-muted);display:block;font:850 0.72rem/1.2 var(--lab-mono);margin-top:5px;text-transform:uppercase}.w3profile-progress-meter{align-items:center;display:grid;gap:13px;grid-template-columns:minmax(0,1fr) max-content;min-width:0}.w3profile-progress-meter .w3profile-level-track{background:linear-gradient(180deg,rgba(255,255,255,0.035),transparent 45%),rgba(5,7,8,0.88);border-color:rgba(135,206,255,0.16);box-shadow:inset 0 0 0 1px rgba(255,255,255,0.025),inset 0 -8px 16px rgba(0,0,0,0.24);height:8px;min-width:0}.w3profile-progress-meter .w3profile-level-track>span{box-shadow:0 0 16px rgba(117,240,160,0.26),0 0 22px rgba(102,228,255,0.18)}.w3profile-progress-meter em{color:var(--lab-gold);font:950 0.74rem/1 var(--lab-mono);font-style:normal;letter-spacing:0.04em;min-width:38px;text-align:right;text-shadow:0 0 14px rgba(255,209,102,0.18);white-space:nowrap}.w3profile-grid{align-items:start;display:grid;gap:16px;grid-template-areas:"identity mission" "referral referral" "ledger ledger";grid-template-columns:minmax(0,0.96fr) minmax(0,1.04fr)}.w3profile-level-panel{align-items:start;background:radial-gradient(circle at 12% 0%,rgba(255,209,102,0.16),transparent 18rem),linear-gradient(135deg,rgba(102,228,255,0.07),rgba(117,240,160,0.04)),rgba(7,16,25,0.94);border:1px solid rgba(255,209,102,0.18);border-radius:var(--lab-radius);display:grid;gap:14px;grid-template-columns:minmax(220px,0.58fr) minmax(280px,0.42fr);padding:clamp(16px,2vw,22px)}.w3profile-level-panel h2{color:var(--lab-gold);font:950 clamp(1.45rem,2.6vw,2.2rem)/1.02 var(--lab-heading);margin:0 0 8px}.w3profile-level-panel p{color:var(--lab-muted);line-height:1.55;margin:0}.w3profile-level-meter{background:rgba(255,255,255,0.04);border:1px solid 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li.is-active{background:linear-gradient(135deg,rgba(255,209,102,0.13),rgba(117,240,160,0.07)),rgba(255,255,255,0.035);border-color:rgba(255,209,102,0.34);box-shadow:inset 0 1px 0 rgba(255,255,255,0.06)}.w3profile-rank-ladder span{align-items:center;background:rgba(102,228,255,0.08);border:1px solid rgba(102,228,255,0.14);border-radius:999px;color:var(--lab-dim);display:inline-flex;font:900 0.58rem/1 var(--lab-mono);grid-row:span 2;height:25px;justify-content:center;width:25px}.w3profile-rank-ladder li.is-active span{background:rgba(255,209,102,0.16);border-color:rgba(255,209,102,0.34);color:var(--lab-gold)}.w3profile-rank-ladder strong{color:var(--lab-ink);font:900 0.78rem/1.12 var(--lab-sans);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3profile-rank-ladder small{color:var(--lab-dim);font:850 0.58rem/1 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small{color:var(--lab-muted);display:block;font-size:0.72rem;margin-top:3px;overflow-wrap:anywhere}.w3profile-provider-card em{background:rgba(117,240,160,0.09);border:1px solid rgba(117,240,160,0.17);border-radius:999px;color:var(--lab-mint);font:900 0.58rem/1 var(--lab-mono);padding:6px 8px;text-transform:uppercase}.w3profile-mission-status{align-items:center;background:linear-gradient(135deg,rgba(255,209,102,0.08),rgba(102,228,255,0.045)),rgba(7,13,21,0.76);border:1px solid rgba(255,209,102,0.16);border-radius:var(--lab-radius);display:flex;gap:10px;justify-content:space-between;min-height:44px;padding:10px 12px}.w3profile-mission-status strong{color:var(--lab-gold);font:950 0.88rem/1 var(--lab-mono);text-transform:uppercase}.w3profile-mission-status span{color:var(--lab-muted);font:850 0.72rem/1 var(--lab-mono);text-transform:uppercase}.w3profile-mission-status.is-solved{border-color:rgba(117,240,160,0.22)}.w3profile-mission-status.is-solved strong{color:var(--lab-mint)}.w3profile-mission-note{color:var(--lab-muted);line-height:1.55;margin:0}.w3profile-panel-action,.w3profile-empty a{align-items:center;background:rgba(102,228,255,0.08);border:1px solid rgba(102,228,255,0.2);border-radius:999px;color:var(--lab-ink);display:inline-flex;font:900 0.82rem/1 var(--lab-sans);justify-content:center;margin-top:12px;min-height:38px;padding:0 16px;text-decoration:none;transition:background 160ms ease,border-color 160ms ease}.w3profile-panel-action:hover,.w3profile-empty a:hover{background:rgba(102,228,255,0.14);border-color:rgba(102,228,255,0.36)}.w3profile-meters{display:grid;gap:8px;grid-template-columns:repeat(4,minmax(0,1fr))}.w3profile-referral-panel{align-items:stretch;background:radial-gradient(circle at 8% 16%,rgba(117,240,160,0.16),transparent 17rem),radial-gradient(circle at 94% 6%,rgba(255,209,102,0.16),transparent 18rem),linear-gradient(140deg,rgba(117,240,160,0.1),rgba(102,228,255,0.055) 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rgba(255,255,255,0.08);display:grid;gap:7px;justify-items:center;min-height:128px;padding:18px;text-align:center}.w3profile-referral-reward small,.w3profile-referral-reward span{color:var(--lab-dim);font:850 0.62rem/1 var(--lab-mono);text-transform:uppercase}.w3profile-referral-reward strong{color:var(--lab-gold);font:950 clamp(1.55rem,2.6vw,2.35rem)/1 var(--lab-heading);justify-content:center}.w3profile-referral-box{align-items:center;background:linear-gradient(90deg,rgba(7,13,21,0.78),rgba(7,16,25,0.68)),rgba(7,13,21,0.58);border:1px solid rgba(135,206,255,0.22);border-radius:var(--lab-radius);display:grid;gap:12px;grid-template-columns:minmax(0,1fr) auto;margin:0;min-height:72px;padding:12px}.w3profile-referral-box code{color:var(--lab-cyan-bright);display:block;font:850 clamp(0.78rem,1.05vw,0.96rem)/1.45 var(--lab-mono);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3profile-referral-box button{background:linear-gradient(135deg,var(--lab-mint),var(--lab-cyan));border:1px solid rgba(102,228,255,0.36);border-radius:999px;color:var(--lab-bg);cursor:pointer;font:950 0.82rem/1 var(--lab-sans);min-height:48px;padding:0 22px;white-space:nowrap}.w3profile-data.w3profile-referral-stats{grid-template-columns:repeat(4,minmax(0,1fr))}.w3profile-referral-stats div{background:linear-gradient(135deg,rgba(255,255,255,0.045),rgba(102,228,255,0.035)),rgba(255,255,255,0.025);min-height:74px;padding:13px 14px}.w3profile-referral-stats dd{color:var(--lab-ink);font:950 1.35rem/1.05 var(--lab-heading)}.w3profile-ledger{display:grid;gap:9px;list-style:none;margin:0;padding:0}.w3profile-ledger li{align-items:center;background:rgba(255,255,255,0.035);border:1px solid rgba(135,206,255,0.11);border-radius:var(--lab-radius);display:flex;justify-content:space-between;min-height:46px;padding:10px 12px}.w3profile-ledger span{color:var(--lab-muted);text-transform:capitalize}.w3profile-ledger strong{color:var(--lab-gold);font:900 0.84rem/1 var(--lab-mono)}.w3profile-empty{background:rgba(255,255,255,0.035);border:1px dashed rgba(135,206,255,0.18);border-radius:var(--lab-radius);display:grid;gap:8px;margin:0;padding:14px}.w3profile-empty strong{color:var(--lab-ink);font:900 1rem/1.2 var(--lab-sans)}.w3profile-empty span{color:var(--lab-muted);line-height:1.55}.w3leaderboard-hero,.w3leaderboard-current,.w3leaderboard-table-card{background:linear-gradient(160deg,rgba(102,228,255,0.085),rgba(117,240,160,0.045) 48%,rgba(7,16,25,0.94)),rgba(7,16,25,0.94);border:1px solid rgba(135,206,255,0.2);border-radius:var(--lab-radius);box-shadow:0 24px 80px rgba(0,0,0,0.32)}.w3leaderboard-hero{align-items:stretch;display:grid;gap:clamp(14px,1.8vw,22px);grid-template-columns:1fr;padding:clamp(18px,2vw,24px)}.w3leaderboard-hero.has-you{column-gap:clamp(20px,2.4vw,36px);grid-template-columns:minmax(0,1fr) 1px minmax(320px,0.8fr)}.w3leaderboard-hero h1{color:var(--lab-ink);font:950 clamp(2.1rem,3.55vw,3.2rem)/0.98 var(--lab-heading);letter-spacing:0;margin:0}.w3leaderboard-hero-main{align-content:space-between;display:grid;gap:clamp(18px,2.6vw,30px)}.w3leaderboard-hero-sep{align-self:stretch;background:linear-gradient(180deg,transparent,rgba(135,206,255,0.22) 22%,rgba(135,206,255,0.22) 78%,transparent);width:1px}.w3leaderboard-hero.has-you .w3leaderboard-hero-stats{grid-template-columns:repeat(3,minmax(0,1fr))}.w3leaderboard-hero:not(.has-you) .w3leaderboard-hero-stats{grid-template-columns:repeat(4,minmax(0,1fr));max-width:760px}.w3leaderboard-you{align-content:space-between;display:grid;gap:clamp(14px,2vw,22px)}.w3leaderboard-you-head>span{color:var(--lab-gold);display:block;font:850 0.66rem/1 var(--lab-mono);margin-bottom:7px;text-transform:uppercase}.w3leaderboard-you-head>strong{color:var(--lab-ink);display:block;font:900 clamp(1.28rem,1.7vw,1.6rem)/1.04 var(--lab-heading);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3leaderboard-you 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1.5z'/%3E%3C/svg%3E")}.w3leaderboard-hero-stats,.w3leaderboard-current-stats{display:grid;gap:10px;grid-template-columns:repeat(4,minmax(0,1fr))}.w3leaderboard-hero-stats>span,.w3leaderboard-current-stats>span{background:rgba(255,255,255,0.045);border:1px solid rgba(135,206,255,0.14);border-radius:var(--lab-radius);display:grid;gap:4px;align-content:center;min-height:54px;padding:9px 12px}.w3leaderboard-hero-stats strong{align-self:center;color:var(--lab-gold);display:block;font:950 clamp(0.96rem,1.18vw,1.08rem)/1 var(--lab-heading);grid-column:2;grid-row:1;min-width:0;overflow:hidden;overflow-wrap:normal;text-overflow:ellipsis;white-space:nowrap}.w3leaderboard-hero-stats small{color:var(--lab-dim);font:850 0.62rem/1 var(--lab-mono);grid-column:2;grid-row:2;min-width:0;overflow:hidden;text-overflow:ellipsis;text-transform:uppercase;white-space:nowrap}.w3leaderboard-hero-stats>span{align-content:center;column-gap:11px;grid-template-columns:auto minmax(0,1fr);row-gap:3px}.w3leaderboard-hero-stats>span::before{align-self:center;background-position:center;background-repeat:no-repeat;background-size:18px;border:1px solid rgba(255,209,102,0.22);border-radius:9px;content:"";grid-column:1;grid-row:1 / span 2;height:34px;width:34px}.w3leaderboard-hero-stats>span:nth-child(1)::before{background-color:rgba(102,228,255,0.12);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%2366e4ff'%3E%3Ccircle cx='9' cy='8' r='3.2'/%3E%3Ccircle cx='17' cy='9' r='2.6'/%3E%3Cpath d='M9 13c-3.3 0-6 1.7-6 3.8V19h12v-2.2C15 14.7 12.3 13 9 13z'/%3E%3Cpath d='M17 13.4c-.7 0-1.4.1-2 .3 1.3.9 2 2.1 2 3.1V19h4v-1.8c0-1.9-1.8-3.8-4-3.8z'/%3E%3C/svg%3E");border-color:rgba(102,228,255,0.28)}.w3leaderboard-hero-stats>span:nth-child(2)::before{background-color:rgba(117,240,160,0.12);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' 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at 50% -12%,var(--medal-glow),transparent 15rem),linear-gradient(155deg,rgba(102,228,255,0.08),rgba(7,16,25,0.94)),rgba(7,16,25,0.94);border:1px solid rgba(135,206,255,0.18);border-radius:var(--lab-radius);box-shadow:0 22px 60px rgba(0,0,0,0.28);display:grid;align-content:start;gap:12px;grid-template-rows:auto auto;min-height:0;padding:16px 14px 14px;position:relative;transition:transform 0.24s ease,border-color 0.24s ease,box-shadow 0.24s ease}.w3leaderboard-podium-card:hover{border-color:var(--lab-line-strong);transform:translateY(-4px)}.w3leaderboard-podium-card.is-rank-1{--medal-a:#ffe6ab;--medal-b:#ffd166;--medal-glow:rgba(255,209,102,0.28);border-color:rgba(255,209,102,0.42);box-shadow:0 30px 82px rgba(255,209,102,0.14),0 24px 70px rgba(0,0,0,0.36);order:2;z-index:2}.w3leaderboard-podium-card.is-rank-2{--medal-a:#abf0ff;--medal-b:#a8b8c8;--medal-glow:rgba(171,240,255,0.15);order:1}.w3leaderboard-podium-card.is-rank-3{--medal-a:#ffd166;--medal-b:#ba8712;--medal-glow:rgba(255,209,102,0.15);order:3}.w3leaderboard-podium-card.is-rank-1::before{background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 18' fill='%23ffd166'%3E%3Cpath d='M2 15.5h20a1 1 0 0 0 1-1.2l-1.5-8.6a.6.6 0 0 0-1-.3L16 9 12.7 2.6a.8.8 0 0 0-1.4 0L8 9 3.5 5.2a.6.6 0 0 0-1 .3L1 14.3a1 1 0 0 0 1 1.2z'/%3E%3C/svg%3E") center / contain no-repeat;content:"";filter:drop-shadow(0 3px 6px rgba(255,209,102,0.45));height:26px;left:50%;position:absolute;top:-22px;transform:translateX(-50%);width:36px}.w3leaderboard-podium-card.is-current,.w3leaderboard-row.is-current{border-color:rgba(117,240,160,0.36);box-shadow:inset 0 0 0 1px rgba(117,240,160,0.08)}.w3leaderboard-rank{align-items:center;background:linear-gradient(150deg,var(--medal-a),var(--medal-b));border:none;border-radius:999px;box-shadow:0 4px 12px rgba(0,0,0,0.38),inset 0 1px 0 rgba(255,255,255,0.55);color:var(--lab-void);display:inline-flex;font:950 0.82rem/1 var(--lab-mono);height:34px;justify-content:center;position:absolute;right:12px;top:12px;width:34px}.w3leaderboard-podium-card .w3lab-avatar.is-large{height:48px;width:48px}.w3leaderboard-podium-link{align-items:center;color:var(--lab-ink);display:grid;gap:9px;grid-template-columns:auto minmax(0,1fr);margin-right:48px;min-width:0;text-decoration:none}.w3leaderboard-podium-link strong{color:var(--lab-ink);display:block;font:900 clamp(0.94rem,1.05vw,1.04rem)/1.08 var(--lab-heading);margin:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3leaderboard-podium-link small{color:var(--lab-muted);display:block;font-size:0.76rem;line-height:1.1;margin:4px 0 0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3leaderboard-podium-link:hover strong,.w3leaderboard-player-link:hover strong{color:var(--lab-cyan)}.w3leaderboard-podium-card dl{align-self:start;display:grid;gap:7px;grid-template-columns:repeat(3,minmax(0,1fr));margin:0}.w3leaderboard-podium-card dl div{align-content:center;background:rgba(255,255,255,0.04);border:1px solid rgba(135,206,255,0.12);border-radius:9px;display:grid;gap:4px;justify-items:center;min-height:50px;padding:7px 8px;text-align:center}.w3leaderboard-podium-card dt{color:var(--lab-dim);font:850 0.56rem/1 var(--lab-mono);text-transform:uppercase}.w3leaderboard-podium-card dd{color:var(--lab-gold);font:900 0.8rem/1 var(--lab-mono);margin:0;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3leaderboard-podium-card dd.w3hp-amount{justify-content:center;width:100%}.w3leaderboard-table-card{display:grid;gap:12px;padding:clamp(14px,1.6vw,18px)}.w3leaderboard-table-head{align-items:end;display:flex;gap:14px;justify-content:space-between}.w3leaderboard-table-head h2{color:var(--lab-ink);font:900 clamp(1.24rem,1.65vw,1.62rem)/1 var(--lab-heading);margin:4px 0 0}.w3leaderboard-table-actions{align-items:center;display:flex;flex-wrap:wrap;gap:8px;justify-content:flex-end}.w3leaderboard-table-actions a{align-items:center;background:linear-gradient(135deg,var(--lab-mint),var(--lab-cyan));border-radius:999px;color:var(--lab-bg);display:inline-flex;font:950 0.78rem/1 var(--lab-sans);justify-content:center;min-height:40px;padding:0 16px;text-decoration:none;white-space:nowrap}.w3leaderboard-table-actions a.is-secondary{background:rgba(255,255,255,0.045);border:1px solid rgba(135,206,255,0.2);color:var(--lab-ink)}.w3leaderboard-table-actions a:hover,.w3leaderboard-table-actions a:focus-visible{box-shadow:0 0 0 3px rgba(102,228,255,0.14);transform:translateY(-1px)}.w3leaderboard-table{display:grid;gap:6px;position:relative}.w3leaderboard-row{--rank-col:72px;--player-col:minmax(220px,1.45fr);--title-col:minmax(150px,0.58fr);--solved-col:minmax(180px,0.62fr);--exp-col:minmax(116px,0.42fr);--hp-col:minmax(138px,0.5fr);align-items:center;background:linear-gradient(90deg,rgba(102,228,255,0.045),transparent 38%),rgba(255,255,255,0.032);border:1px solid rgba(135,206,255,0.11);border-radius:var(--lab-radius);box-shadow:inset 0 1px 0 rgba(255,255,255,0.035);display:grid;column-gap:12px;grid-template-columns:var(--rank-col) var(--player-col) var(--title-col) var(--solved-col) var(--exp-col) var(--hp-col);isolation:isolate;min-height:54px;padding:8px 12px;position:relative;scroll-margin-top:96px;transition:border-color 0.18s ease,background 0.18s ease,box-shadow 0.18s ease,transform 0.18s ease}.w3leaderboard-row:not(.is-head):hover{background:linear-gradient(90deg,rgba(102,228,255,0.1),transparent 42%),rgba(255,255,255,0.046);border-color:rgba(135,206,255,0.32);box-shadow:0 0 0 1px rgba(102,228,255,0.16),0 12px 28px rgba(0,0,0,0.16),inset 0 1px 0 rgba(255,255,255,0.065)}.w3leaderboard-row.is-current{background:linear-gradient(90deg,rgba(117,240,160,0.12),transparent 46%),rgba(117,240,160,0.06);box-shadow:0 0 0 1px rgba(117,240,160,0.18),inset 0 1px 0 rgba(255,255,255,0.055)}.w3leaderboard-row.is-medal-1 .w3leaderboard-rank-cell,.w3leaderboard-row.is-medal-2 .w3leaderboard-rank-cell,.w3leaderboard-row.is-medal-3 .w3leaderboard-rank-cell{align-items:center;display:inline-flex;gap:8px}.w3leaderboard-row.is-medal-1 .w3leaderboard-rank-cell::before,.w3leaderboard-row.is-medal-2 .w3leaderboard-rank-cell::before,.w3leaderboard-row.is-medal-3 .w3leaderboard-rank-cell::before{border-radius:999px;box-shadow:0 0 8px rgba(0,0,0,0.4),inset 0 1px 0 rgba(255,255,255,0.5);content:"";flex:0 0 auto;height:11px;width:11px}.w3leaderboard-row.is-medal-1 .w3leaderboard-rank-cell{color:var(--lab-gold-bright)}.w3leaderboard-row.is-medal-1 .w3leaderboard-rank-cell::before{background:linear-gradient(150deg,var(--lab-gold-bright),var(--lab-gold))}.w3leaderboard-row.is-medal-2 .w3leaderboard-rank-cell{color:var(--lab-cyan-bright)}.w3leaderboard-row.is-medal-2 .w3leaderboard-rank-cell::before{background:linear-gradient(150deg,var(--lab-cyan-bright),var(--lab-muted))}.w3leaderboard-row.is-medal-3 .w3leaderboard-rank-cell{color:var(--lab-gold)}.w3leaderboard-row.is-medal-3 .w3leaderboard-rank-cell::before{background:linear-gradient(150deg,var(--lab-gold),var(--lab-gold-deep))}.w3leaderboard-row.is-head{align-items:center;background:linear-gradient(180deg,rgba(7,16,25,0.98),rgba(7,16,25,0.9));backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-color:rgba(135,206,255,0.12);color:var(--lab-dim);font:850 0.62rem/1 var(--lab-mono);min-height:28px;position:sticky;top:84px;text-transform:uppercase;z-index:4}.w3leaderboard-row.is-head>span:nth-child(3){justify-self:center}.w3leaderboard-row.is-head>span:nth-child(n+4){justify-self:end;text-align:right}.w3leaderboard-rank-cell{color:var(--lab-gold);font:950 0.86rem/1 var(--lab-mono);font-variant-numeric:tabular-nums}.w3leaderboard-player-cell{align-items:center;display:grid;gap:10px;grid-template-columns:minmax(0,1fr) auto;min-width:0}.w3leaderboard-player-link{align-items:center;color:var(--lab-ink);display:grid;gap:10px;grid-template-columns:auto minmax(0,1fr);min-width:0;text-decoration:none}.w3leaderboard-player-link strong{display:block;color:var(--lab-ink);font-size:0.94rem;line-height:1.1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3leaderboard-player-link small{color:var(--lab-dim);display:block;font:800 0.68rem/1.1 var(--lab-sans);margin-top:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3leaderboard-player-cell em{background:rgba(117,240,160,0.1);border:1px solid rgba(117,240,160,0.2);border-radius:999px;color:var(--lab-mint);font:900 0.58rem/1 var(--lab-mono);font-style:normal;padding:6px 8px;text-transform:uppercase}.w3leaderboard-row>span:not(.w3lab-avatar):not(.w3leaderboard-player-cell):not(.w3leaderboard-rank-cell){color:var(--lab-muted);font-size:0.9rem;font-weight:800;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3leaderboard-title-cell{align-items:center;background:rgba(164,140,255,0.09);border:1px solid rgba(164,140,255,0.18);border-radius:999px;color:var(--lab-violet-bright) !important;display:inline-flex;font:900 0.74rem/1 var(--lab-sans) !important;justify-self:center;justify-content:center;max-width:100%;min-height:30px;padding:0 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var(--lab-mono);text-transform:uppercase}.w3leaderboard-solve-meter{background:rgba(255,255,255,0.055);border-radius:999px;display:block;height:5px;overflow:hidden;width:min(100%,156px)}.w3leaderboard-solve-meter>span{background:linear-gradient(90deg,var(--lab-mint),var(--lab-cyan));border-radius:inherit;box-shadow:0 0 12px rgba(102,228,255,0.25);display:block;height:100%;transform:scaleX(calc(var(--pct,0) / 100));transform-origin:left center;transition:transform 650ms 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auto;height:1em;-webkit-mask-position:center;mask-position:center;-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;-webkit-mask-size:contain;mask-size:contain;width:1em}.w3icon-star{-webkit-mask-image:url("/static/images/icons/ctf/badge-star.svg");mask-image:url("/static/images/icons/ctf/badge-star.svg")}.w3icon-trophy{-webkit-mask-image:url("/static/images/icons/ctf/badge-trophy.svg");mask-image:url("/static/images/icons/ctf/badge-trophy.svg")}.w3icon-flag{-webkit-mask-image:url("/static/images/icons/ctf/badge-flag.svg");mask-image:url("/static/images/icons/ctf/badge-flag.svg")}.w3icon-flame{-webkit-mask-image:url("/static/images/icons/ctf/badge-flame.svg");mask-image:url("/static/images/icons/ctf/badge-flame.svg")}.w3icon-shield{-webkit-mask-image:url("/static/images/icons/ctf/badge-shield.svg");mask-image:url("/static/images/icons/ctf/badge-shield.svg")}.w3icon-coin{-webkit-mask-image:url("/static/images/icons/ctf/badge-coin.svg");mask-image:url("/static/images/icons/ctf/badge-coin.svg")}.w3icon-lock{-webkit-mask-image:url("/static/images/icons/ctf/badge-lock.svg");mask-image:url("/static/images/icons/ctf/badge-lock.svg")}.w3icon-gift{-webkit-mask-image:url("/static/images/icons/ctf/badge-gift.svg");mask-image:url("/static/images/icons/ctf/badge-gift.svg")}.w3public-avatar-frame{--pct:0;display:inline-grid;height:104px;place-items:center;position:relative;width:104px}.w3public-avatar-frame::before{background:conic-gradient(from 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var(--lab-heading);height:26px;justify-content:center;position:absolute;right:-2px;width:26px}.w3public-identity h1{color:var(--lab-ink);font:950 clamp(2.1rem,5vw,4.6rem)/0.96 var(--lab-heading);letter-spacing:0;margin:4px 0 12px;overflow-wrap:anywhere}.w3public-hero-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.w3public-hero-meta span{align-items:center;background:rgba(255,255,255,0.055);border:1px solid rgba(135,206,255,0.15);border-radius:999px;color:var(--lab-muted);display:inline-flex;font:900 0.66rem/1 var(--lab-mono);gap:6px;padding:8px 12px 8px 10px;text-transform:uppercase}.w3public-hero-meta .w3icon{height:0.95em;width:0.95em}.w3public-hero-meta span.is-class{border-color:rgba(255,209,102,0.32);color:var(--lab-gold)}.w3public-hero-meta span.is-top{border-color:rgba(102,228,255,0.4);color:var(--lab-cyan)}.w3public-xp-bar{--pct:0;display:grid;gap:6px;max-width:30rem}.w3public-xp-meter{align-items:center;display:grid;gap:13px;grid-template-columns:minmax(0,1fr) max-content;min-width:0}.w3public-xp-track{background:rgba(255,255,255,0.07);border:1px solid rgba(135,206,255,0.16);border-radius:999px;height:10px;overflow:hidden;position:relative}.w3public-xp-fill{background:linear-gradient(90deg,var(--lab-mint),var(--lab-cyan));border-radius:999px;height:100%;overflow:hidden;position:relative;transition:width 1.2s cubic-bezier(0.16,1,0.3,1);width:calc(var(--pct) * 1%)}.w3public-xp-fill::after{animation:w3publicXpSheen 2.6s ease-in-out infinite;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.55),transparent);content:"";bottom:0;left:0;position:absolute;top:0;width:40%}.w3public-xp-meter em{color:var(--lab-gold);font:950 0.74rem/1 var(--lab-mono);font-style:normal;letter-spacing:0.04em;min-width:38px;text-align:right;text-shadow:0 0 14px rgba(255,209,102,0.18);white-space:nowrap}@keyframes 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strong{align-items:center;color:var(--lab-gold);display:inline-flex;font:950 1.8rem/1 var(--lab-heading);min-height:2.1rem}.w3public-vital .w3hp-amount{display:grid;gap:0.48em;grid-template-columns:1.35em max-content;justify-content:center}.w3public-vital .w3hp-amount::before{grid-column:1;justify-self:center}.w3public-vital .w3hp-amount{justify-items:center}.w3public-vital small{color:var(--lab-muted);font:900 0.62rem/1 var(--lab-mono);text-transform:uppercase}.w3public-share-card button{align-items:center;background:linear-gradient(135deg,var(--lab-mint),var(--lab-cyan));border:1px solid rgba(102,228,255,0.36);border-radius:999px;color:var(--lab-bg);cursor:pointer;display:inline-flex;font:950 0.78rem/1 var(--lab-sans);justify-content:center;min-height:40px;padding:0 15px;transition:filter 0.2s ease;width:100%}.w3public-share-card button:hover{filter:brightness(1.08)}.w3public-section-head a,.w3public-achievements-open{align-items:center;background:linear-gradient(135deg,var(--lab-mint),var(--lab-cyan));border:1px solid rgba(102,228,255,0.36);border-radius:999px;color:var(--lab-bg);display:inline-flex;font:950 0.78rem/1 var(--lab-sans);justify-content:center;min-height:38px;padding:0 15px;text-decoration:none;white-space:nowrap}.w3public-achievements-open{cursor:pointer}.w3public-achievements-open:hover,.w3public-achievements-open:focus-visible{box-shadow:0 10px 24px rgba(102,228,255,0.2);filter:brightness(1.06);outline:0;transform:translateY(-1px)}.w3public-dossier{align-items:start;display:grid;gap:16px;grid-template-columns:minmax(0,1.2fr) minmax(320px,0.8fr)}.w3public-achievement-rail{display:grid;gap:16px;grid-template-rows:auto minmax(0,1fr)}.w3public-next-milestone{background:radial-gradient(circle at 88% 0%,rgba(255,209,102,0.14),transparent 13rem),linear-gradient(155deg,rgba(102,228,255,0.08),rgba(7,16,25,0.94)),rgba(7,16,25,0.94);border:1px solid rgba(255,209,102,0.26);border-radius:var(--lab-radius);box-shadow:0 24px 74px rgba(0,0,0,0.28);display:grid;gap:9px;min-height:178px;overflow:hidden;padding:20px;position:relative}.w3public-featured-badge{align-items:center;background:linear-gradient(140deg,rgba(255,209,102,0.12),transparent 34%),linear-gradient(165deg,rgba(102,228,255,0.075),rgba(7,16,25,0.96) 55%,rgba(7,16,25,0.98)),rgba(7,16,25,0.96);border:1px solid rgba(255,209,102,0.36);border-radius:var(--lab-radius);box-shadow:0 26px 74px rgba(0,0,0,0.34),0 0 0 1px rgba(255,209,102,0.055),inset 0 1px 0 rgba(255,255,255,0.08);display:grid;gap:18px;grid-template-columns:auto minmax(0,1fr);min-height:178px;overflow:hidden;padding:22px;position:relative}.w3public-featured-badge::before{border:1px solid rgba(255,230,171,0.12);border-radius:8px;content:"";inset:10px;pointer-events:none;position:absolute}.w3public-featured-badge::after{background:linear-gradient(120deg,transparent 18%,rgba(255,255,255,0.075) 48%,transparent 72%);content:"";inset:0;opacity:0.54;pointer-events:none;position:absolute}.w3public-featured-medallion{align-items:center;background:radial-gradient(circle at 34% 26%,rgba(255,255,255,0.2),transparent 32%),linear-gradient(145deg,rgba(255,209,102,0.22),rgba(255,209,102,0.055)),rgba(255,209,102,0.05);border:1px solid rgba(255,209,102,0.5);border-radius:999px;box-shadow:0 16px 38px rgba(0,0,0,0.34),0 0 34px rgba(255,209,102,0.14),inset 0 1px 0 rgba(255,255,255,0.18);color:var(--lab-gold);display:inline-grid;height:76px;justify-content:center;position:relative;width:76px;z-index:1}.w3public-featured-medallion::after{border:1px solid rgba(255,230,171,0.28);border-radius:inherit;content:"";inset:7px;pointer-events:none;position:absolute}.w3public-featured-copy{display:grid;gap:8px;min-width:0;position:relative;z-index:1}.w3public-featured-badge .w3icon{height:2.35rem;width:2.35rem}.w3public-featured-badge h2{color:var(--lab-ink);font:950 clamp(1.55rem,2.5vw,2.25rem)/0.96 var(--lab-heading);margin:0;overflow-wrap:anywhere;text-shadow:0 0 24px rgba(255,255,255,0.08)}.w3public-featured-copy>span,.w3public-next-milestone>span{color:var(--lab-muted);font:900 0.82rem/1.2 var(--lab-sans)}.w3public-featured-badge.is-cyan{border-color:rgba(102,228,255,0.32)}.w3public-featured-badge.is-cyan .w3public-featured-medallion{border-color:rgba(102,228,255,0.48);color:var(--lab-cyan)}.w3public-featured-badge.is-mint{border-color:rgba(117,240,160,0.3)}.w3public-featured-badge.is-mint .w3public-featured-medallion{border-color:rgba(117,240,160,0.48);color:var(--lab-mint)}.w3public-featured-badge.is-violet{border-color:rgba(164,140,255,0.32)}.w3public-featured-badge.is-violet .w3public-featured-medallion{border-color:rgba(164,140,255,0.5);color:var(--lab-violet)}.w3public-badge-shelf{background:radial-gradient(circle at 88% 0%,rgba(102,228,255,0.055),transparent 13rem),linear-gradient(160deg,rgba(102,228,255,0.045),rgba(7,16,25,0.96)),rgba(7,16,25,0.96);align-content:start;gap:14px}.w3public-badge-shelf .w3public-section-head{align-items:start}.w3public-badge-shelf .w3public-section-head h2{font-size:clamp(1.28rem,1.9vw,1.65rem);margin-top:0}.w3public-shelf-count{color:var(--lab-muted);display:block;font:850 0.7rem/1 var(--lab-mono);margin-top:7px;text-transform:uppercase}.w3public-card{display:grid;gap:14px;padding:clamp(16px,2.2vw,24px)}.w3public-section-head{align-items:end;display:flex;gap:14px;justify-content:space-between}.w3public-section-head h2{color:var(--lab-ink);font:900 clamp(1.35rem,2.4vw,2.1rem)/1 var(--lab-heading);margin:4px 0 0}.w3public-section-head>span{color:var(--lab-muted);font:850 0.72rem/1 var(--lab-mono);text-transform:uppercase}.w3public-badges{display:grid;gap:8px;grid-template-columns:repeat(2,minmax(0,1fr))}.w3public-badges>span{--badge-tone:var(--lab-cyan);align-items:center;animation:w3publicRise 0.5s cubic-bezier(0.16,1,0.3,1) both;background:linear-gradient(90deg,color-mix(in srgb,var(--badge-tone) 13%,transparent),transparent 46%),rgba(255,255,255,0.026);border:1px solid rgba(135,206,255,0.12);border-radius:8px;box-shadow:inset 0 1px 0 rgba(255,255,255,0.035);display:grid;gap:11px;grid-template-columns:28px minmax(0,1fr);min-height:66px;overflow:hidden;padding:11px 12px;position:relative;transition:border-color 0.2s ease,box-shadow 0.2s ease,transform 0.2s ease}.w3public-badges>span:nth-child(-n+2){min-height:72px}.w3public-badges>span:hover{border-color:color-mix(in srgb,var(--badge-tone) 38%,rgba(135,206,255,0.12));box-shadow:0 12px 28px rgba(0,0,0,0.16),inset 0 1px 0 rgba(255,255,255,0.055);transform:translateY(-1px)}.w3public-badges .w3icon{align-items:center;background:currentColor;color:var(--badge-tone);height:1.25rem;justify-self:center;width:1.25rem}.w3public-badges>span>.w3icon{filter:drop-shadow(0 0 10px color-mix(in srgb,var(--badge-tone) 20%,transparent))}.w3public-badge-copy{display:grid;gap:4px;min-width:0}.w3public-badges>span.is-gold{--badge-tone:var(--lab-gold);border-color:rgba(255,209,102,0.2)}.w3public-badges>span.is-cyan{--badge-tone:var(--lab-cyan);border-color:rgba(102,228,255,0.2)}.w3public-badges>span.is-mint{--badge-tone:var(--lab-mint);border-color:rgba(117,240,160,0.2)}.w3public-badges>span.is-violet{--badge-tone:var(--lab-violet);border-color:rgba(164,140,255,0.2)}.w3public-badges>span.is-locked{--badge-tone:var(--lab-dim);background:rgba(255,255,255,0.02);border-color:rgba(135,206,255,0.09)}.w3public-badges>span.is-locked:hover{transform:none}.w3public-badges>span.is-locked strong,.w3public-badges>span.is-locked small{color:var(--lab-dim)}.w3public-badges small{color:var(--lab-dim);font:850 0.58rem/1 var(--lab-mono);overflow:hidden;text-overflow:ellipsis;text-transform:uppercase;white-space:nowrap}.w3public-badges strong{color:var(--lab-ink);font:900 0.88rem/1.12 var(--lab-heading);overflow:hidden;overflow-wrap:anywhere;text-overflow:clip;white-space:normal}.w3public-badges em{color:var(--lab-dim);font:750 0.66rem/1.25 var(--lab-sans);font-style:normal;overflow:hidden;text-overflow:ellipsis}.w3public-badges>span:nth-child(-n+2) strong{font-size:0.94rem}.w3public-next-milestone{border-color:rgba(135,206,255,0.18);min-height:0;padding:16px}.w3public-next-milestone strong{color:var(--lab-ink);font:950 1.2rem/1.05 var(--lab-heading)}.w3public-badges span:nth-child(1){animation-delay:0.02s}.w3public-badges span:nth-child(2){animation-delay:0.08s}.w3public-badges span:nth-child(3){animation-delay:0.14s}.w3public-badges span:nth-child(4){animation-delay:0.2s}.w3public-badges span:nth-child(5){animation-delay:0.26s}.w3public-badges span:nth-child(6){animation-delay:0.32s}body.w3public-achievement-dialog-open{overflow:hidden}.w3public-achievement-dialog[hidden]{display:none}.w3public-achievement-dialog{align-items:center;display:grid;inset:0;justify-items:center;padding:20px;position:fixed;z-index:160}.w3public-achievement-dialog-backdrop{background:rgba(5,7,8,0.78);border:0;cursor:pointer;inset:0;position:absolute}.w3public-achievement-dialog-panel{background:radial-gradient(circle at 88% 2%,rgba(102,228,255,0.13),transparent 19rem),radial-gradient(circle at 4% 96%,rgba(117,240,160,0.08),transparent 17rem),linear-gradient(155deg,rgba(18,156,186,0.99),rgba(7,13,21,0.995));border:1px solid rgba(102,228,255,0.32);border-radius:16px;box-shadow:0 32px 110px rgba(0,0,0,0.68),0 0 0 1px rgba(255,255,255,0.035),inset 0 1px 0 rgba(255,255,255,0.08);max-height:min(800px,calc(100dvh - 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1.55rem/1 var(--lab-sans);height:38px;justify-content:center;padding:0;transition:background 0.18s ease,border-color 0.18s ease,color 0.18s ease,transform 0.18s ease;width:38px}.w3public-achievement-dialog-close:hover,.w3public-achievement-dialog-close:focus-visible{background:rgba(102,228,255,0.13);border-color:rgba(102,228,255,0.58);color:var(--lab-cyan);outline:0;transform:rotate(90deg)}.w3public-badges--dialog{gap:6px;grid-auto-rows:74px;grid-template-columns:repeat(3,minmax(0,1fr))}.w3public-badges--dialog>span,.w3public-badges--dialog>span:nth-child(-n+2){animation:none;align-items:center;background:linear-gradient(90deg,color-mix(in srgb,var(--badge-tone) 8%,transparent),transparent 48%),rgba(255,255,255,0.015);border:0;border-radius:6px;gap:10px;grid-template-columns:30px minmax(0,1fr);min-height:0;padding:8px 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auto;min-height:96px;padding-bottom:8px;padding-top:8px}.w3lesson .w3lab-brand{align-self:center;grid-area:brand;justify-content:center;justify-self:stretch;min-height:100%}.w3lesson .w3lab-hud{align-self:stretch;grid-area:hud}.w3lesson .w3lab-hud:has(.w3lab-scorebar .w3lab-metric-tip:hover),.w3lesson .w3lab-hud:has(.w3lab-scorebar .w3lab-metric-tip:focus-within){z-index:95}.w3lesson .w3lab-topbar-actions{align-self:center;grid-area:actions;height:auto;min-height:44px}.w3lesson .w3lab-topbar-actions>a,.w3lesson .w3lab-topbar-actions>button,.w3lesson .w3lab-topbar-actions>details>summary{min-height:36px}.w3lesson .w3lab-dev-menu,.w3lesson .w3lab-account-menu{display:flex;min-height:36px}.w3lesson .w3lab-dev-menu summary{min-width:84px}.w3lesson .w3lab-account-menu summary{min-width:176px;padding:0 10px}.w3lesson .w3lab-account-menu.has-daily-claim summary{padding-right:34px}.w3lesson .w3lab-account-copy{display:grid}.w3lesson .w3lab-account-panel .w3lab-account-link,.w3lesson .w3lab-account-panel .w3lab-account-logout button{border-radius:999px !important;font-size:0.8rem;justify-content:center;min-height:42px;min-width:0;padding:0 14px;width:100%}.w3lesson .w3lab-account-panel .w3lab-account-link.is-tour-link{font-size:0.72rem;min-height:38px}@media (min-width:1440px) and (max-width:1800px){.w3lesson .w3lab-topbar{gap:14px;grid-template-columns:minmax(190px,220px) minmax(0,1fr) max-content}.w3lesson .w3lab-topbar-actions>a,.w3lesson .w3lab-topbar-actions>details>summary{font-size:0.74rem;min-height:34px;min-width:58px;padding:0 9px}.w3lesson .w3lab-dev-menu summary{min-width:58px;padding:0 9px}.w3lesson .w3lab-dev-menu summary::before{display:none}.w3lesson .w3lab-account-menu summary{gap:7px;min-width:160px;padding:0 10px}.w3lesson .w3lab-account-menu.has-daily-claim summary{padding-right:34px}.w3lesson .w3lab-avatar{height:30px;width:30px}.w3lesson .w3lab-account-copy strong{font-size:0.72rem;max-width:7rem}.w3lesson .w3lab-account-copy small{font-size:0.5rem}.w3lesson .w3lab-brand{align-self:center;gap:10px;justify-content:center}.w3lesson .w3lab-hud{gap:10px;grid-template-columns:minmax(260px,1fr) minmax(150px,176px);min-height:64px;padding:8px 10px}.w3lesson .w3lab-topbar-actions{min-height:42px}.w3lesson .w3lab-topbar-actions>a,.w3lesson .w3lab-topbar-actions>button,.w3lesson .w3lab-topbar-actions>details>summary{min-height:34px}.w3lesson .w3lab-exp-rank strong{font-size:0.96rem}.w3lesson .w3lab-exp{gap:6px;min-height:48px}.w3lesson .w3lab-exp-rank{gap:4px 8px}.w3lesson .w3lab-exp-rank span{font-size:0.6rem;letter-spacing:0.08em}.w3lesson .w3lab-exp-rank small{font-size:0.56rem}.w3lesson .w3lab-exp-rank em{display:none}.w3lesson .w3lab-exp-track{height:15px}.w3lesson .w3lab-scorebar{min-height:44px}.w3lesson .w3lab-scorebar>span{gap:10px;grid-template-columns:34px max-content;min-height:50px;padding:7px 12px;width:min(100%,178px)}.w3lesson .w3lab-hp-token{height:34px;width:34px}.w3lesson .w3lab-scorebar strong{font-size:0.78rem}.w3lesson .w3lab-scorebar .w3lab-token-balance strong{font-size:0.86rem}.w3lesson .w3lab-scorebar small{font-size:0.43rem;letter-spacing:0.035em}}@media (min-width:1440px) and (max-width:1459px){.w3lesson .w3lab-account-menu summary{min-width:58px}.w3lesson .w3lab-account-copy{display:none}}@media (min-width:1801px){.w3lesson .w3lab-topbar{gap:16px;grid-template-columns:minmax(180px,218px) minmax(0,1fr) max-content}.w3lesson .w3lab-hud{grid-template-columns:330px minmax(260px,1fr) minmax(252px,278px)}.w3lesson .w3lab-topbar-actions>a,.w3lesson .w3lab-topbar-actions>details>summary{min-width:68px;padding:0 10px}.w3lesson .w3lab-account-menu summary{min-width:150px}.w3lesson .w3lab-account-copy strong{max-width:6.4rem}}.w3lesson-level-rail{align-items:center;display:grid;gap:6px;grid-area:levels;grid-auto-columns:max-content;grid-auto-flow:column;min-width:0;overflow-x:auto;padding:0 2px 4px;scrollbar-color:rgba(102,228,255,0.34) transparent;scrollbar-width:thin}.w3lesson-level-rail::-webkit-scrollbar{height:6px}.w3lesson-level-rail::-webkit-scrollbar-track{background:transparent}.w3lesson-level-rail::-webkit-scrollbar-thumb{background:rgba(102,228,255,0.26);border-radius:999px}.w3lesson-level-rail a,.w3lesson-level-rail>span{align-items:center;background:linear-gradient(180deg,rgba(255,255,255,0.035),rgba(255,255,255,0.012)),rgba(7,16,25,0.72);border:1px solid rgba(135,206,255,0.13);border-radius:999px;color:var(--lab-ink);display:inline-grid;column-gap:7px;grid-template-columns:auto max-content auto;height:38px;min-width:0;padding:0 10px;text-decoration:none;transition:background 180ms ease,border-color 180ms ease,box-shadow 180ms ease,color 180ms ease}.w3lesson-level-rail a:hover{background:rgba(102,228,255,0.1);border-color:rgba(102,228,255,0.32)}.w3lesson-level-rail .is-active{background:linear-gradient(135deg,rgba(102,228,255,0.18),rgba(117,240,160,0.1)),rgba(7,16,25,0.94);border-color:rgba(102,228,255,0.46);box-shadow:0 0 0 1px rgba(102,228,255,0.08),0 0 24px rgba(102,228,255,0.08),inset 0 1px 0 rgba(255,255,255,0.08)}.w3lesson-level-rail .is-solved{border-color:rgba(117,240,160,0.34)}.w3lesson-level-rail .is-solved .w3lesson-level-check{align-items:center;display:inline-flex;justify-content:center}.w3lesson-level-rail .w3lesson-level-check,.w3lesson-level-rail .w3lesson-level-playable,.w3lesson-level-rail .w3lesson-level-lock{align-items:center;display:inline-flex;justify-content:center}.w3lesson-level-check span,.w3lesson-level-playable span,.w3lesson-level-lock span{background:linear-gradient(135deg,rgba(179,247,203,0.24),transparent 58%),rgba(117,240,160,0.14);border:1px solid rgba(117,240,160,0.72);border-radius:50%;box-shadow:0 0 12px rgba(117,240,160,0.28),inset 0 0 8px rgba(117,240,160,0.14);display:inline-block;height:16px;position:relative;width:16px}.w3lesson-level-check span::after{border-bottom:2px solid var(--lab-mint-bright);border-right:2px solid var(--lab-mint-bright);content:"";height:8px;left:50%;position:absolute;top:50%;transform:translate(-50%,-58%) rotate(45deg);width:5px}.w3lesson-level-playable span{background:linear-gradient(135deg,rgba(171,240,255,0.22),transparent 58%),rgba(102,228,255,0.12);border-color:rgba(102,228,255,0.64);box-shadow:0 0 12px rgba(102,228,255,0.24),inset 0 0 8px rgba(102,228,255,0.12)}.w3lesson-level-playable span::after{background:var(--lab-cyan);clip-path:polygon(18% 8%,18% 92%,88% 50%);content:"";height:10px;left:50%;position:absolute;top:50%;transform:translate(-43%,-50%);width:9px}.w3lesson-level-lock span{background:linear-gradient(135deg,rgba(168,184,200,0.16),transparent 58%),rgba(114,132,152,0.11);border-color:rgba(168,184,200,0.34);box-shadow:0 0 10px rgba(7,16,25,0.32),inset 0 0 8px rgba(168,184,200,0.08)}.w3lesson-level-lock span::before{border:1.2px solid rgba(168,184,200,0.78);border-bottom:0;border-radius:6px 6px 0 0;box-sizing:border-box;content:"";height:5.4px;left:50%;position:absolute;top:1.7px;transform:translateX(-50%);width:6.6px}.w3lesson-level-lock span::after{background:radial-gradient(circle at 50% 42%,rgba(7,13,21,0.92) 0 1px,transparent 1.15px),rgba(168,184,200,0.82);box-sizing:border-box;border-radius:2px;content:"";height:5.6px;left:50%;position:absolute;top:6.4px;transform:translateX(-50%);width:7.4px}.w3lesson-level-rail .is-locked{opacity:0.72}.w3lesson-level-rail .is-locked:hover,.w3lesson-level-rail .is-locked:focus-visible{background:rgba(168,184,200,0.1);border-color:rgba(168,184,200,0.38);opacity:1}.w3lesson-level-rail .is-reviewable em{color:var(--lab-cyan)}.w3lesson-level-rail span span,.w3lesson-level-rail a span{color:var(--lab-gold);font:950 0.72rem/1 var(--lab-mono);min-width:18px;white-space:nowrap}.w3lesson-level-rail strong{color:var(--lab-ink);font:850 0.78rem/1 var(--lab-heading);min-width:max-content;white-space:nowrap}.w3lesson-level-rail em{color:var(--lab-dim);font:850 0.53rem/1 var(--lab-mono);font-style:normal;text-transform:uppercase;white-space:nowrap}.w3lesson-level-rail .is-solved em:not(.w3lesson-level-check),.w3lesson-level-rail em.w3lesson-level-playable{color:var(--lab-mint)}.w3lesson-shell{display:grid;grid-template-columns:minmax(360px,0.42fr) minmax(520px,0.58fr);min-height:calc(100vh - 114px);position:relative;z-index:1}.w3lesson-reader{background:rgba(7,13,21,0.92);border-right:1px solid rgba(135,206,255,0.18);min-height:0;overflow:auto}.w3lesson-reader-inner{margin:0 auto;max-width:760px;padding:clamp(26px,3.2vw,52px)}.w3lesson-reader h1,.w3lesson-reader h2,.w3lesson-editor-head h2{color:var(--lab-ink);font-family:var(--lab-heading);font-weight:800;letter-spacing:0;margin:0}.w3lesson-reader h1{font-size:clamp(2rem,2.8vw,3rem);line-height:1.25}@media (min-width:981px){.w3lesson-reader h1{font-size:clamp(1.25rem,2.05vw,2.44rem);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}}.w3lesson-reader h2{font-size:clamp(1.15rem,1.35vw,1.45rem);line-height:1.18;margin-top:34px}.w3lesson-reader p,.w3lesson-steps span,.w3lesson-instruction-list,.w3lesson-help-list,.w3lesson-callout span{color:var(--lab-muted);font-size:1.02rem;line-height:1.68}.w3lesson-lede{color:var(--lab-cyan-bright);font-size:1.08rem;margin-top:18px}.w3lesson-review-pass{align-items:center;background:radial-gradient(circle at 8% 10%,rgba(102,228,255,0.16),transparent 9rem),linear-gradient(135deg,rgba(102,228,255,0.09),rgba(117,240,160,0.055)),rgba(255,255,255,0.035);border:1px solid rgba(102,228,255,0.27);border-radius:var(--lab-radius);box-shadow:0 14px 34px rgba(0,0,0,0.18),inset 0 1px 0 rgba(255,255,255,0.07);display:grid;gap:14px;grid-template-columns:minmax(0,1fr) auto;margin-top:22px;padding:15px 16px}.w3lesson-review-pass.is-progress-locked{background:radial-gradient(circle at 8% 10%,rgba(255,209,102,0.13),transparent 9rem),linear-gradient(135deg,rgba(255,209,102,0.07),rgba(102,228,255,0.045)),rgba(255,255,255,0.035);border-color:rgba(255,209,102,0.24)}.w3lesson-review-pass>div{display:grid;gap:6px}.w3lesson-review-pass strong{color:var(--lab-ink);font:900 0.98rem/1.25 var(--lab-heading)}.w3lesson-review-pass span{color:var(--lab-muted);font-size:0.9rem;line-height:1.45}.w3lesson-review-pass a,.w3lesson-review-lock a{align-items:center;background:linear-gradient(120deg,rgba(117,240,160,0.96),rgba(102,228,255,0.96));border:1px solid rgba(179,247,203,0.64);border-radius:999px;color:var(--lab-bg);display:inline-flex;font-size:0.82rem;font-weight:950;justify-content:center;min-height:42px;padding:0 16px;text-decoration:none;white-space:nowrap}.w3lesson-review-pass a:hover,.w3lesson-review-pass a:focus-visible,.w3lesson-review-lock a:hover,.w3lesson-review-lock a:focus-visible{box-shadow:0 10px 24px rgba(102,228,255,0.2);transform:translateY(-1px)}.w3lesson-title-row{align-items:center;display:flex;flex-wrap:nowrap;gap:8px;justify-content:space-between;margin-bottom:12px;min-width:0}.w3lesson-title-row .w3lab-kicker{margin:0;white-space:nowrap}.w3lesson-source-link{align-items:center;background:rgba(255,255,255,0.03);border:1px solid rgba(255,209,102,0.2);border-radius:999px;color:var(--lab-ink);display:inline-flex;flex:0 0 auto;gap:5px;max-width:100%;min-width:0;padding:3px 8px 3px 4px;text-decoration:none;transition:border-color 160ms ease,background 160ms ease}.w3lesson-heading-row{align-items:center;display:flex;gap:16px;justify-content:space-between;min-width:0}.w3lesson-heading-row h1{flex:1 1 auto;min-width:0}.w3lesson-heading-row #w3lesson-title>span{color:var(--lab-mint)}@supports ((background-clip:text) or (-webkit-background-clip:text)){.w3lesson-heading-row #w3lesson-title>span{-webkit-background-clip:text;background-clip:text;background-image:linear-gradient(90deg,var(--lab-gold),var(--lab-mint),var(--lab-cyan));filter:drop-shadow(0 0 14px rgba(117,240,160,0.13));-webkit-text-fill-color:transparent}}@media (forced-colors:active){.w3lesson-heading-row #w3lesson-title>span{background:none;color:CanvasText;filter:none;-webkit-text-fill-color:currentColor}}.w3lesson-heading-row .w3lab-ethernaut-mark{width:82px}.w3lesson-source-link:hover,.w3lesson-source-link:focus-visible{background:rgba(255,230,171,0.06);border-color:rgba(255,230,171,0.5);outline:none}.w3lesson-source-link strong{color:var(--lab-ink);font:750 0.84rem/1.2 var(--lab-sans);min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3lesson-source-link-icon{color:rgba(255,230,171,0.6);flex:0 0 auto;height:12px;transition:color 160ms ease,transform 160ms ease;width:12px}.w3lesson-source-link:hover .w3lesson-source-link-icon,.w3lesson-source-link:focus-visible .w3lesson-source-link-icon{color:var(--lab-gold);transform:translate(1px,-1px)}.w3lesson-reader code{color:var(--lab-cyan-bright);font-family:var(--lab-mono);font-size:0.92em}.w3lesson-callout{background:rgba(102,228,255,0.08);border:1px solid rgba(102,228,255,0.24);border-radius:var(--lab-radius);display:grid;gap:7px;margin-top:22px;padding:15px 16px}.w3lesson-callout strong,.w3lesson-steps strong,.w3lesson-instruction-list strong{color:var(--lab-ink);font-weight:800}.w3lesson-instruction-list,.w3lesson-help-list{display:grid;gap:9px;list-style-position:inside;margin:14px 0 0;padding-left:0}.w3lesson-instruction-list li,.w3lesson-help-list li{padding-left:0}.w3lesson-instruction-list li::marker{color:var(--lab-mint);font-family:var(--lab-mono);font-weight:900}.w3lesson-help-list li::marker{color:var(--lab-gold)}.w3lesson-steps{display:grid;gap:10px;list-style:none;margin:18px 0 0;padding:0}.w3lesson-steps li{background:rgba(255,255,255,0.045);border:1px solid rgba(135,206,255,0.13);border-radius:var(--lab-radius);counter-increment:step;display:grid;gap:6px;padding:14px 16px 14px 54px;position:relative}.w3lesson-steps li::before{align-items:center;background:rgba(117,240,160,0.12);border:1px solid rgba(117,240,160,0.3);border-radius:50%;color:var(--lab-mint);content:counter(step);display:inline-flex;font:900 0.76rem/1 var(--lab-mono);height:28px;justify-content:center;left:15px;position:absolute;top:15px;width:28px}.w3lesson-hints-panel{background:radial-gradient(circle at 0% 0%,rgba(255,209,102,0.12),transparent 14rem),linear-gradient(180deg,rgba(18,156,186,0.98),rgba(7,13,21,0.98)),rgba(7,13,21,0.98);border:1px solid rgba(255,209,102,0.24);border-radius:var(--lab-radius);box-shadow:0 24px 70px rgba(0,0,0,0.48),0 0 0 1px rgba(255,255,255,0.035),inset 0 1px 0 rgba(255,255,255,0.06);display:grid;gap:12px;max-height:min(68vh,520px);max-width:min(460px,calc(100vw - 28px));overflow:hidden;padding:15px;position:fixed;right:22px;width:460px;z-index:55}.w3lesson-hints-panel[hidden]{display:none}.w3lesson-hints-panel.is-pulsing{animation:hint-panel-pulse 1.3s ease}@keyframes hint-panel-pulse{0%,100%{box-shadow:0 18px 54px rgba(0,0,0,0.24)}35%{border-color:rgba(255,209,102,0.55);box-shadow:0 20px 60px rgba(0,0,0,0.3),0 0 0 3px rgba(255,209,102,0.1),0 0 42px rgba(255,209,102,0.16)}}.w3lesson-hints-head{align-items:end;border-bottom:1px solid rgba(255,209,102,0.12);display:flex;gap:14px;justify-content:space-between;margin:-15px -15px 0;padding:15px}.w3lesson-hints-head h2{color:var(--lab-ink);font:900 1.25rem/1 var(--lab-heading);margin-top:4px}.w3lesson-hints-head>span{align-items:center;background:rgba(255,209,102,0.1);border:1px solid rgba(255,209,102,0.24);border-radius:7px;color:var(--lab-gold);display:inline-flex;font:900 0.66rem/1 var(--lab-mono);justify-content:center;min-height:38px;min-width:48px;padding:0 10px;white-space:nowrap}.w3lesson-hints-head-actions{align-items:center;display:flex;flex-shrink:0;gap:10px}.w3lesson-hints-head-actions>span{align-items:center;background:rgba(255,209,102,0.1);border:1px solid rgba(255,209,102,0.24);border-radius:7px;color:var(--lab-gold);display:inline-flex;font:900 0.66rem/1 var(--lab-mono);justify-content:center;min-height:38px;min-width:48px;padding:0 10px;white-space:nowrap}#w3lesson-hints-close{background:rgba(255,255,255,0.06);border:1px solid rgba(135,206,255,0.2);border-radius:7px;color:var(--lab-ink);cursor:pointer;font-weight:850;min-height:38px;padding:0 15px}.w3lesson-hint-list{display:grid;gap:10px;list-style:none;margin:0;max-height:360px;overflow:auto;padding:0}.w3lesson-hint-list li{background:rgba(255,255,255,0.045);border:1px solid rgba(255,209,102,0.16);border-radius:var(--lab-radius);display:grid;gap:9px;padding:13px 14px}.w3lesson-hint-list span{color:var(--lab-gold);font:950 0.64rem/1 var(--lab-mono);letter-spacing:0.08em;text-transform:uppercase}.w3lesson-hint-list p,.w3lesson-hints-empty{color:var(--lab-muted);font-size:0.98rem;line-height:1.55;margin:0}.w3lesson-hints-empty{border:1px dashed rgba(135,206,255,0.18);border-radius:var(--lab-radius);padding:13px 14px}.w3lesson-workspace{background:radial-gradient(circle at 78% 20%,rgba(102,228,255,0.08),transparent 22rem),rgba(7,13,21,0.88);display:grid;grid-template-rows:auto minmax(0,1fr) auto;min-height:0;overflow:hidden}.w3lesson-actionbar{align-items:center;background:linear-gradient(90deg,rgba(18,156,186,0.98),rgba(7,13,21,0.98)),rgba(7,13,21,0.98);border-bottom:1px solid rgba(102,228,255,0.22);box-shadow:0 12px 34px rgba(0,0,0,0.26),inset 0 1px 0 rgba(255,255,255,0.04);display:grid;gap:14px;grid-template-columns:minmax(0,1fr) auto;min-height:62px;padding:10px 16px;position:relative;z-index:4}.w3lesson-actionbar::before{background:linear-gradient(90deg,rgba(102,228,255,0.62),rgba(117,240,160,0.2),transparent);bottom:-1px;content:"";height:1px;left:0;position:absolute;right:0}.w3lesson-actionbar-meta{display:grid;gap:3px;min-width:0}.w3lesson-actionbar-meta strong{color:var(--lab-ink);font-weight:850;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3lesson-actionbar-meta span{color:var(--lab-muted);font-size:0.82rem}.w3lesson-editor-card{background:var(--lab-code);display:grid;grid-template-rows:auto minmax(0,1fr);min-height:0}.w3lesson-editor-tabs{background:radial-gradient(circle at 26px 14px,rgba(255,209,102,0.09),transparent 4.8rem),rgba(255,255,255,0.03);border-bottom:1px solid rgba(102,228,255,0.2);display:flex;gap:5px;min-height:58px;overflow:visible;padding:10px 12px 0;position:relative;z-index:8}.w3lesson-editor-tabs.is-multifile{overflow-x:auto;overflow-y:hidden;scrollbar-color:rgba(102,228,255,0.28) transparent;scrollbar-width:thin}.w3lesson-editor-tabs.is-multifile button{min-width:152px}.w3lesson-editor-tabs button{align-items:center;background:linear-gradient(180deg,rgba(255,255,255,0.07),transparent 48%),rgba(255,255,255,0.045);border:1px solid rgba(135,206,255,0.16);border-bottom:0;border-radius:var(--lab-radius) var(--lab-radius) 0 0;color:var(--lab-muted);cursor:pointer;display:inline-flex;gap:10px;font-weight:800;min-height:48px;min-width:164px;padding:0 18px 0 12px;position:relative;transition:background 180ms ease,border-color 180ms ease,color 180ms ease,box-shadow 180ms ease}.w3lesson-editor-tabs button.is-active{background:linear-gradient(180deg,rgba(255,255,255,0.1),transparent 46%),linear-gradient(135deg,rgba(102,228,255,0.2),rgba(117,240,160,0.1)),rgba(18,156,186,0.92);border-color:rgba(102,228,255,0.44);box-shadow:0 -10px 26px rgba(102,228,255,0.08),inset 0 1px 0 rgba(255,255,255,0.12);color:var(--lab-ink)}.w3lesson-editor-tabs button:hover{border-color:rgba(102,228,255,0.34);color:var(--lab-ink)}.w3lesson-editor-tabs button.w3lesson-tab-needs-attention:not(.is-active){animation:w3lesson-exploit-tab-pulse 2600ms ease-in-out infinite;border-color:rgba(102,228,255,0.36);color:var(--lab-cyan-bright)}.w3lesson-editor-tabs button.w3lesson-tab-needs-attention:not(.is-active)::after{background:var(--lab-gold);border-radius:50%;box-shadow:0 0 0 0 rgba(255,209,102,0.32),0 0 16px rgba(255,209,102,0.28);content:"";height:7px;position:absolute;right:12px;top:11px;width:7px}.w3lesson-editor-tabs button.w3lesson-tab-needs-attention:not(.is-active) .w3file-icon{animation:w3lesson-exploit-icon-pulse 2600ms ease-in-out infinite}.w3file-icon{align-items:center;background:linear-gradient(180deg,rgba(255,255,255,0.11),transparent 48%),rgba(7,16,25,0.9);border:1px solid rgba(135,206,255,0.18);border-radius:10px;box-shadow:inset 0 1px 0 rgba(255,255,255,0.1),0 8px 20px rgba(0,0,0,0.2);display:inline-flex;flex:0 0 auto;height:32px;justify-content:center;width:32px}.w3file-icon img{aspect-ratio:1;display:block;flex:0 0 auto;height:24px;object-fit:contain;width:24px}.w3file-icon--contract{border-color:rgba(255,209,102,0.24)}.w3file-icon--contract img{filter:drop-shadow(0 0 3px rgba(255,209,102,0.14))}.w3file-icon--exploit{border-color:rgba(102,228,255,0.28)}.w3file-icon--exploit img{filter:drop-shadow(0 0 3px rgba(102,228,255,0.16));height:26px;width:26px}.w3file-tooltip{background:linear-gradient(180deg,rgba(255,255,255,0.08),transparent 58%),rgba(7,13,21,0.98);border:1px solid rgba(135,206,255,0.24);border-radius:999px;box-shadow:0 14px 30px rgba(0,0,0,0.34),inset 0 1px 0 rgba(255,255,255,0.07);color:var(--lab-ink);font:850 0.68rem/1 var(--lab-sans);left:50%;opacity:0;padding:8px 11px;pointer-events:none;position:absolute;top:56px;transform:translate(-50%,-4px);transition:opacity 150ms ease,transform 150ms ease,visibility 150ms ease;visibility:hidden;white-space:nowrap;z-index:20}.w3file-tooltip::before{background:rgba(135,206,255,0.24);clip-path:polygon(50% 0,100% 100%,0 100%);content:"";height:6px;left:50%;position:absolute;top:-6px;transform:translateX(-50%);width:10px}.w3lesson-editor-tabs button:hover .w3file-tooltip,.w3lesson-editor-tabs button:focus-visible .w3file-tooltip{opacity:1;transform:translate(-50%,0);visibility:visible}.w3lesson-panel{display:none;grid-template-rows:auto minmax(0,1fr);min-height:0}.w3lesson-panel.is-active{display:grid}.w3lesson-editor-tabs button.is-review-locked{border-color:rgba(168,184,200,0.22);color:rgba(168,184,200,0.8)}.w3lesson-review-lock{align-content:center;background:radial-gradient(circle at 50% 30%,rgba(102,228,255,0.08),transparent 15rem),linear-gradient(180deg,rgba(7,16,25,0.96),rgba(7,13,21,0.98));display:grid;justify-items:center;min-height:100%;padding:clamp(32px,7vw,72px) clamp(22px,5vw,56px);text-align:center}.w3lesson-review-lock-mark{background:radial-gradient(circle at 50% 45%,rgba(102,228,255,0.2),transparent 65%),rgba(102,228,255,0.08);border:1px solid rgba(102,228,255,0.3);border-radius:50%;box-shadow:0 0 32px rgba(102,228,255,0.1);height:58px;margin-bottom:20px;position:relative;width:58px}.w3lesson-review-lock-mark::before{border:2px solid var(--lab-cyan);border-bottom:0;border-radius:10px 10px 0 0;content:"";height:13px;left:50%;position:absolute;top:13px;transform:translateX(-50%);width:17px}.w3lesson-review-lock-mark::after{background:var(--lab-cyan);border-radius:4px;content:"";height:18px;left:50%;position:absolute;top:25px;transform:translateX(-50%);width:25px}.w3lesson-review-lock h2{color:var(--lab-ink);font:850 clamp(1.35rem,2.2vw,1.9rem)/1.18 var(--lab-heading);margin:8px 0 0}.w3lesson-review-lock p:not(.w3lab-kicker){color:var(--lab-muted);line-height:1.6;margin:14px 0 22px;max-width:36rem}.w3lesson-editor-head{align-items:center;border-bottom:1px solid rgba(135,206,255,0.14);display:flex;justify-content:space-between;gap:14px;min-height:74px;padding:14px 18px}.w3lesson-editor-head h2{font-size:clamp(1.12rem,1.35vw,1.42rem);line-height:1.18}.w3lesson-editor-note{color:var(--lab-muted);font-size:0.86rem;line-height:1.35;margin:7px 0 0;max-width:42rem}.w3lesson-editor-badges{align-items:center;display:flex;flex:0 0 auto;flex-wrap:wrap;gap:8px;justify-content:flex-end}.w3lesson-editor-status,.w3lesson-workspace-pill{background:rgba(255,209,102,0.1);border:1px solid rgba(255,209,102,0.26);border-radius:999px;color:var(--lab-gold);font:900 0.68rem/1 var(--lab-mono);padding:8px 10px;white-space:nowrap}.w3lesson-workspace-pill{background:rgba(102,228,255,0.1);border-color:rgba(102,228,255,0.25);color:var(--lab-cyan)}.w3lesson-editor-status.is-complete{background:rgba(117,240,160,0.13);border-color:rgba(117,240,160,0.32);color:var(--lab-mint)}.w3lesson-editor-wrap{display:grid;grid-template-columns:58px minmax(0,1fr);min-height:0;overflow:hidden;position:relative}.w3lesson-lines{background:rgba(255,255,255,0.025);border-right:1px solid rgba(135,206,255,0.11);color:var(--lab-dim);font:0.92rem/1.68 var(--lab-mono);padding:18px 14px 18px 0;text-align:right;user-select:none}#w3lab-editor{background:transparent;border:0;caret-color:var(--lab-ink);color:transparent;font:0.95rem/1.68 var(--lab-mono);grid-column:2;grid-row:1;min-height:100%;outline:0;padding:18px 20px;resize:none;tab-size:4;white-space:pre;width:100%;z-index:2}#w3lab-editor:focus{box-shadow:inset 0 0 0 2px rgba(102,228,255,0.34)}#w3lab-editor::selection{background:rgba(102,228,255,0.28);color:transparent}@media (forced-colors:active){#w3lab-editor{color:CanvasText}#w3lab-editor::selection{color:HighlightText}.w3lesson-editor-highlight{display:none}}.w3lesson-editor-highlight{background:var(--lab-code);color:var(--lab-cyan-bright);font:0.95rem/1.68 var(--lab-mono);grid-column:2;grid-row:1;margin:0;min-height:100%;overflow:hidden;padding:18px 20px;pointer-events:none;tab-size:4;white-space:pre;z-index:1}.w3lesson-editor-highlight code{font:inherit}.w3lesson-autocomplete{background:linear-gradient(180deg,rgba(18,156,186,0.98),rgba(7,13,21,0.99)),var(--lab-code);border:1px solid rgba(102,228,255,0.28);border-radius:8px;box-shadow:0 18px 40px rgba(0,0,0,0.42),0 0 0 1px rgba(117,240,160,0.06),inset 0 1px 0 rgba(255,255,255,0.06);color:var(--lab-cyan-bright);font:0.82rem/1.35 var(--lab-mono);left:72px;max-height:236px;overflow:auto;padding:6px;position:absolute;top:64px;width:min(340px,calc(100% - 86px));z-index:6}.w3lesson-autocomplete[hidden]{display:none}.w3lesson-autocomplete-option{align-items:center;border:1px solid transparent;border-radius:6px;color:rgba(171,240,255,0.86);cursor:default;display:grid;gap:10px;grid-template-columns:minmax(0,1fr) auto;min-height:42px;padding:7px 9px}.w3lesson-autocomplete-option+.w3lesson-autocomplete-option{margin-top:2px}.w3lesson-autocomplete-option span{display:grid;gap:1px;min-width:0}.w3lesson-autocomplete-option strong{color:var(--lab-ink);font-size:0.86rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3lesson-autocomplete-option small{color:rgba(168,184,200,0.9);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3lesson-autocomplete-option em{border:1px solid rgba(102,228,255,0.14);border-radius:999px;color:rgba(117,240,160,0.9);font-size:0.66rem;font-style:normal;letter-spacing:0.06em;max-width:112px;overflow:hidden;padding:3px 7px;text-overflow:ellipsis;text-transform:uppercase;white-space:nowrap}.w3lesson-autocomplete-option.is-active{background:linear-gradient(90deg,rgba(102,228,255,0.16),rgba(117,240,160,0.08)),rgba(255,255,255,0.035);border-color:rgba(102,228,255,0.34);color:#ffffff}.w3lesson-autocomplete-option.is-active em{background:rgba(117,240,160,0.1);border-color:rgba(117,240,160,0.28)}.w3lesson-panel .w3lab-code-scroll{background:var(--lab-code);display:block;min-height:0;overflow:auto}.w3lesson-panel .w3lab-code-scroll pre{margin:0;min-width:720px;padding:18px 22px 36px}.w3lesson-console{background:linear-gradient(90deg,rgba(102,228,255,0.035),rgba(117,240,160,0.025)),rgba(7,13,21,0.94);border-top:1px solid rgba(135,206,255,0.16);display:block;min-height:0;overflow:hidden}.w3lesson-console[hidden]{display:none}.w3lesson-output{display:grid;grid-template-rows:auto minmax(0,1fr);min-height:0;position:relative}.w3lab-checker-summary{align-items:center;background:linear-gradient(90deg,rgba(102,228,255,0.045),rgba(117,240,160,0.025)),rgba(7,13,21,0.86);border-bottom:1px solid rgba(135,206,255,0.16);display:grid;gap:12px;grid-template-columns:28px minmax(0,1fr) auto;min-height:62px;padding:10px 14px}.w3lab-checker-summary::before{background:var(--lab-cyan);border:6px solid rgba(102,228,255,0.12);border-radius:50%;box-shadow:0 0 18px rgba(102,228,255,0.22);box-sizing:border-box;content:'';height:16px;justify-self:center;width:16px}.w3lab-checker-summary[data-tone="success"]{border-bottom-color:rgba(117,240,160,0.2)}.w3lab-checker-summary[data-tone="success"]::before{background:var(--lab-mint);border-color:rgba(117,240,160,0.14);box-shadow:0 0 18px rgba(117,240,160,0.26)}.w3lab-checker-summary[data-tone="failure"]{border-bottom-color:rgba(255,209,102,0.2)}.w3lab-checker-summary[data-tone="failure"]::before{background:var(--lab-gold);border-color:rgba(255,209,102,0.14);box-shadow:0 0 18px rgba(255,209,102,0.24)}.w3lab-checker-summary[data-tone="error"]{border-bottom-color:rgba(255,107,138,0.22)}.w3lab-checker-summary[data-tone="error"]::before{background:var(--lab-red);border-color:rgba(255,107,138,0.14);box-shadow:0 0 18px rgba(255,107,138,0.24)}.w3lab-checker-summary p{color:var(--lab-muted);font:850 0.74rem/1.4 var(--lab-mono);margin:0;min-width:0}.w3lab-checker-summary button{align-items:center;background:linear-gradient(180deg,rgba(102,228,255,0.12),rgba(102,228,255,0.035)),rgba(7,16,25,0.92);border:1px solid rgba(102,228,255,0.32);border-radius:999px;box-shadow:inset 0 1px 0 rgba(255,255,255,0.08),0 10px 24px rgba(0,0,0,0.18);color:var(--lab-ink);cursor:pointer;display:inline-flex;font:950 0.7rem/1 var(--lab-mono);justify-content:center;min-height:36px;padding:0 13px;transition:border-color 160ms ease,box-shadow 160ms ease,color 160ms ease,transform 160ms ease;white-space:nowrap}.w3lab-checker-summary button:hover:not(:disabled){border-color:rgba(102,228,255,0.58);box-shadow:inset 0 1px 0 rgba(255,255,255,0.1),0 12px 28px rgba(102,228,255,0.12);color:var(--lab-cyan-bright);transform:translateY(-1px)}.w3lab-checker-summary button:disabled{cursor:not-allowed;opacity:0.46}.w3lesson-output #w3lab-log{border-top:1px solid rgba(135,206,255,0.1);min-height:0}.w3lab-checking{align-items:center;background:linear-gradient(180deg,rgba(5,7,8,0.98),rgba(5,7,8,0.99)),repeating-linear-gradient(0deg,rgba(117,240,160,0.04) 0 1px,transparent 1px 10px);border-top:1px solid rgba(117,240,160,0.18);display:grid;gap:18px;grid-template-columns:minmax(168px,0.44fr) minmax(0,1fr);inset:40px 0 0;min-height:132px;padding:18px 22px;position:absolute;z-index:6}.w3lab-checking[hidden]{display:none}.w3lab-checking::before{animation:w3lab-terminal-scan 1600ms linear infinite;background:linear-gradient(90deg,transparent,rgba(117,240,160,0.38),transparent);content:"";height:1px;left:0;position:absolute;right:0;top:0}.w3lab-checking-core{align-self:stretch;background:radial-gradient(circle at 50% 0%,rgba(117,240,160,0.16),transparent 48%),linear-gradient(180deg,rgba(5,7,8,0.96),rgba(5,7,8,0.98));border:1px solid rgba(117,240,160,0.34);border-radius:8px;display:grid;isolation:isolate;min-height:116px;overflow:hidden;padding:14px;position:relative;box-shadow:inset 0 0 0 1px rgba(117,240,160,0.08),inset 0 -24px 44px rgba(0,0,0,0.7),0 0 26px rgba(117,240,160,0.13)}.w3lab-checking-core::before{background:repeating-linear-gradient(0deg,rgba(255,255,255,0.035) 0 1px,transparent 1px 4px),linear-gradient(90deg,transparent,rgba(117,240,160,0.08),transparent);content:"";inset:0;opacity:0.72;position:absolute;z-index:2}.w3lab-checking-core::after{animation:w3lab-terminal-glow 1800ms ease-in-out infinite;background:radial-gradient(circle,rgba(117,240,160,0.18),transparent 58%);content:"";height:82px;left:50%;position:absolute;top:50%;transform:translate(-50%,-50%);width:82px;z-index:0}.w3lab-checking-screen{align-self:end;background:linear-gradient(180deg,rgba(0,0,0,0.34),rgba(0,0,0,0.78)),rgba(5,7,8,0.72);border-top:1px solid rgba(117,240,160,0.18);color:rgba(179,247,203,0.78);display:grid;font-family:var(--lab-mono);font-size:0.62rem;gap:4px;letter-spacing:0;line-height:1.25;margin:0 -14px -14px;min-width:0;padding:8px 10px 7px;position:relative;text-shadow:0 0 9px rgba(117,240,160,0.42);z-index:3}.w3lab-checking-prompt{color:var(--lab-mint-bright);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3lab-checking-line{color:rgba(117,240,160,0.54);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3lab-checking-line::before{color:rgba(117,240,160,0.62);content:">"}.w3lab-checking-caret{animation:w3lab-check-caret 760ms steps(2) infinite;color:var(--lab-mint-bright)}.w3lab-checking-rain{inset:-78px 0 -18px;overflow:hidden;pointer-events:none;position:absolute;z-index:1}.w3lab-checking-rain span{animation:w3lab-matrix-fall 1500ms linear infinite;color:rgba(117,240,160,0.58);display:block;font-family:var(--lab-mono);font-size:0.7rem;left:var(--rain-left);line-height:0.98;position:absolute;text-orientation:upright;text-shadow:0 0 8px rgba(117,240,160,0.66),0 0 18px rgba(117,240,160,0.22);top:0;transform:translateY(-100%);writing-mode:vertical-rl}.w3lab-checking-rain span:nth-child(1){--rain-left:8%;animation-duration:1700ms}.w3lab-checking-rain span:nth-child(2){--rain-left:24%;animation-delay:-520ms;animation-duration:1350ms}.w3lab-checking-rain span:nth-child(3){--rain-left:42%;animation-delay:-860ms;animation-duration:1900ms}.w3lab-checking-rain span:nth-child(4){--rain-left:61%;animation-delay:-260ms;animation-duration:1450ms}.w3lab-checking-rain span:nth-child(5){--rain-left:78%;animation-delay:-1040ms;animation-duration:2100ms}.w3lab-checking-rain span:nth-child(6){--rain-left:91%;animation-delay:-680ms;animation-duration:1580ms}.w3lab-checking-terminal{color:var(--lab-muted);display:grid;font-family:var(--lab-mono);gap:8px;min-width:0}.w3lab-checking-terminal strong{color:var(--lab-mint-bright);font-size:0.94rem;letter-spacing:0;text-shadow:0 0 14px rgba(117,240,160,0.22)}.w3lab-checking-terminal strong::after{animation:w3lab-dots 1000ms steps(4) infinite;content:""}.w3lab-checking-terminal span{color:var(--lab-dim);font-size:0.76rem;overflow:hidden;padding-left:18px;position:relative;text-overflow:ellipsis;text-transform:uppercase;white-space:nowrap}.w3lab-checking-terminal span::before{animation:w3lab-check-step 1300ms ease-in-out infinite;background:var(--lab-mint);border-radius:50%;box-shadow:0 0 10px rgba(117,240,160,0.55);content:"";height:6px;left:1px;position:absolute;top:0.38rem;width:6px}.w3lab-checking-terminal span:nth-child(3)::before{animation-delay:220ms;background:var(--lab-mint-bright)}.w3lab-checking-terminal span:nth-child(4)::before{animation-delay:440ms;background:var(--lab-mint-bright)}.w3lab-checking-modal{align-items:center;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);background:rgba(7,16,25,0.64);display:flex;inset:0;justify-content:center;position:fixed;z-index:9999}.w3lab-checking-modal[hidden]{display:none}.w3lab-checking-modal-backdrop{inset:0;position:absolute;z-index:0}.w3lab-checking-modal-content{align-items:center;background:linear-gradient(180deg,rgba(5,7,8,0.98),rgba(5,7,8,0.99)),repeating-linear-gradient(0deg,rgba(117,240,160,0.04) 0 1px,transparent 1px 10px);border:1px solid rgba(117,240,160,0.28);border-radius:12px;display:grid;gap:32px;grid-template-columns:minmax(200px,0.44fr) minmax(0,1fr);max-width:720px;min-height:280px;padding:32px;position:relative;z-index:1;box-shadow:0 0 48px rgba(117,240,160,0.16),inset 0 0 0 1px rgba(117,240,160,0.12);animation:w3lab-modal-in 320ms cubic-bezier(0.34,1.56,0.64,1)}@keyframes w3lab-modal-in{0%{opacity:0;transform:scale(0.92)}100%{opacity:1;transform:scale(1)}}.w3lab-checking-modal .w3lab-checking-core{box-shadow:inset 0 0 0 1px rgba(117,240,160,0.08),inset 0 -24px 44px rgba(0,0,0,0.7),0 0 36px rgba(117,240,160,0.18)}.w3lab-checking-modal .w3lab-checking-core::after{height:120px;width:120px}.w3lab-checking-modal .w3lab-checking-terminal{align-items:center}.w3lab-checking-modal .w3lab-checking-terminal strong{font-size:1.12rem}.w3lesson-actionbar-actions{--action-button-height:52px;--action-button-width:clamp(164px,10.5vw,192px);align-items:center;display:flex;gap:14px;justify-content:flex-end;min-width:0}.w3lab-page[data-can-attempt="false"] #w3lab-hint,.w3lab-page[data-can-attempt="false"] #w3lab-video-trigger,.w3lab-page[data-can-attempt="false"] #w3lab-hints-open{display:none}.w3lesson-actionbar button{border-radius:999px;cursor:pointer;font-weight:850;min-height:var(--action-button-height);white-space:nowrap}.w3lesson-action-button{align-items:center;border:1px solid rgba(135,206,255,0.24);box-shadow:0 12px 28px rgba(0,0,0,0.18),inset 0 1px 0 rgba(255,255,255,0.11);display:inline-flex;gap:8px;isolation:isolate;justify-content:center;min-height:var(--action-button-height);overflow:hidden;padding:0 14px;position:relative;transition:background 180ms ease,border-color 180ms ease,color 180ms ease,transform 180ms ease,box-shadow 180ms ease,opacity 180ms ease}.w3lesson-action-button::after{background:linear-gradient(90deg,transparent,rgba(255,255,255,0.28),transparent);content:"";height:100%;left:-70%;opacity:0;position:absolute;top:0;transform:skewX(-18deg);transition:left 520ms ease,opacity 180ms ease;width:46%;z-index:-1}.w3lesson-action-button:hover::after,.w3lesson-action-button:focus-visible::after{left:124%;opacity:1}.w3lesson-action-button>*{position:relative;z-index:1}.w3lesson-actionbar-actions .w3lesson-action-button{flex:0 0 var(--action-button-width);width:var(--action-button-width)}.w3action-price{align-items:center;border-inline-start:1px solid rgba(255,255,255,0.2);display:inline-flex;flex:0 0 auto;margin-inline-start:3px;min-height:22px;padding-inline-start:12px}.w3action-price[hidden]{display:none}.w3action-price .w3hp-amount{font-size:0.72rem;gap:0.42em;letter-spacing:0.035em}.w3action-price .w3hp-amount::before{height:1.22em;width:1.22em}.w3action-icon{align-items:center;background:transparent;border:0;border-radius:0;box-shadow:none;display:inline-flex;flex:0 0 auto;height:26px;justify-content:center;width:26px}.w3action-icon::before{background:currentColor;content:"";display:block;filter:drop-shadow(0 0 8px color-mix(in srgb,currentColor 28%,transparent));height:19px;mask-position:center;mask-repeat:no-repeat;mask-size:contain;-webkit-mask-position:center;-webkit-mask-repeat:no-repeat;-webkit-mask-size:contain;width:19px}.w3action-icon--hint::before{mask-image:url("/static/images/icons/ctf/action-hint.svg");-webkit-mask-image:url("/static/images/icons/ctf/action-hint.svg")}.w3action-icon--solution::before{mask-image:url("/static/images/icons/ctf/action-solution.svg");-webkit-mask-image:url("/static/images/icons/ctf/action-solution.svg")}.w3action-icon--run::before{mask-image:url("/static/images/icons/ctf/action-run.svg");-webkit-mask-image:url("/static/images/icons/ctf/action-run.svg")}#w3lab-hint,#w3lab-hints-open{background:radial-gradient(circle at 18% 0%,rgba(255,209,102,0.15),transparent 4rem),linear-gradient(180deg,rgba(255,255,255,0.08),transparent 52%),rgba(7,16,25,0.9);border-color:rgba(255,209,102,0.34);color:var(--lab-gold);min-width:156px;text-shadow:0 0 16px rgba(255,209,102,0.18)}#w3lab-hint .w3action-icon,#w3lab-hints-open .w3action-icon{color:var(--lab-gold);box-shadow:none}#w3lab-hint .w3action-price,#w3lab-hints-open .w3action-price{border-color:rgba(255,209,102,0.32)}#w3lab-hints-open{min-width:118px}#w3lab-hints-open[hidden]{display:none}#w3lab-hints-open em{color:inherit;font:900 0.72rem/1 var(--lab-mono);font-style:normal}#w3lab-hint.is-costly{border-color:rgba(255,209,102,0.24);color:var(--lab-gold)}#w3lab-hint.is-free{background:radial-gradient(circle at 18% 0%,rgba(117,240,160,0.18),transparent 4rem),linear-gradient(180deg,rgba(255,255,255,0.08),transparent 52%),rgba(7,16,25,0.9);border-color:rgba(117,240,160,0.32);color:var(--lab-mint)}#w3lab-hint:disabled,#w3lab-hints-open:disabled,#w3lab-video-trigger:disabled,#w3lab-run:disabled:not(.is-checking){cursor:not-allowed;opacity:0.6;transform:none}.w3lesson-actionbar #w3lab-run:disabled:not(.is-checking){background:rgba(168,184,200,0.11);border-color:rgba(168,184,200,0.24);box-shadow:none;color:rgba(171,240,255,0.72);text-shadow:none}.w3lesson-actionbar #w3lab-run:disabled:not(.is-checking)::before,.w3lesson-actionbar #w3lab-run:disabled:not(.is-checking) .w3action-icon{animation:none;color:rgba(171,240,255,0.72)}#w3lab-video-trigger{background:radial-gradient(circle at 20% 0%,rgba(117,240,160,0.12),transparent 4rem),linear-gradient(180deg,rgba(255,255,255,0.08),transparent 52%),rgba(7,16,25,0.92);border-color:rgba(135,206,255,0.26);color:var(--lab-ink);flex-basis:clamp(190px,12.5vw,220px);min-width:190px}#w3lab-video-trigger .w3action-icon{color:var(--lab-mint);box-shadow:none}#w3lab-video-trigger em{color:var(--lab-gold);font:900 0.72rem/1 var(--lab-mono);font-style:normal}#w3lab-video-trigger .w3action-price{border-color:rgba(255,209,102,0.3)}#w3lab-video-trigger.is-unlocked{background:radial-gradient(circle at 20% 0%,rgba(117,240,160,0.2),transparent 4rem),linear-gradient(180deg,rgba(255,255,255,0.08),transparent 52%),rgba(7,16,25,0.92);border-color:rgba(117,240,160,0.28);color:var(--lab-mint)}#w3lab-video-trigger.is-unlocked em{color:var(--lab-mint)}.w3lesson-actionbar #w3lab-run{background:radial-gradient(circle at 20% 0%,rgba(255,255,255,0.38),transparent 4.4rem),radial-gradient(circle at 84% 110%,rgba(102,228,255,0.14),transparent 4.8rem),linear-gradient(120deg,var(--lab-mint) 0%,var(--lab-cyan) 48%,var(--lab-cyan) 100%);border-color:rgba(179,247,203,0.76);box-shadow:0 14px 30px rgba(102,228,255,0.24),0 0 0 1px rgba(117,240,160,0.16),0 0 28px rgba(117,240,160,0.16),inset 0 1px 0 rgba(255,255,255,0.48),inset 0 -7px 18px rgba(18,156,186,0.13);color:var(--lab-bg);font-weight:950;letter-spacing:0;padding:0 16px;text-shadow:0 1px 0 rgba(255,255,255,0.18)}.w3lesson-actionbar #w3lab-run::before{animation:w3lesson-run-glow 3600ms ease-in-out infinite;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.34),transparent),radial-gradient(circle at 50% 50%,rgba(255,255,255,0.22),transparent 60%);border-radius:inherit;content:"";inset:2px;opacity:0.58;pointer-events:none;position:absolute;transform:translateX(-58%);z-index:0}.w3lesson-actionbar #w3lab-run .w3action-icon{animation:w3lesson-run-icon-pop 2400ms ease-in-out infinite;background:transparent;border-color:transparent;box-shadow:none;color:var(--lab-bg)}.w3lesson-action-button:hover,.w3lesson-action-button:focus-visible{transform:translateY(-1px)}.w3lesson-actionbar #w3lab-run:hover,.w3lesson-actionbar #w3lab-run:focus-visible{box-shadow:0 18px 38px rgba(102,228,255,0.32),0 0 0 1px rgba(255,255,255,0.18),0 0 40px rgba(117,240,160,0.24),inset 0 1px 0 rgba(255,255,255,0.58),inset 0 -8px 20px rgba(18,156,186,0.15);transform:translateY(-1px)}.w3lesson-actionbar #w3lab-run:hover::before,.w3lesson-actionbar #w3lab-run:focus-visible::before{animation-duration:1900ms;opacity:0.82}.w3lesson-actionbar #w3lab-run.is-checking{background:linear-gradient(90deg,rgba(255,209,102,0.92),rgba(117,240,160,0.96),rgba(102,228,255,0.94)),var(--lab-cyan);background-size:220% 100%;box-shadow:0 18px 42px rgba(102,228,255,0.28),0 0 36px rgba(255,209,102,0.16)}@keyframes w3lesson-run-glow{0%,100%{transform:translateX(-58%)}48%,62%{transform:translateX(58%)}}@keyframes w3lesson-run-icon-pop{0%,100%{transform:translateY(0) rotate(-3deg) scale(1)}48%{transform:translateY(-1px) rotate(-3deg) scale(1.08)}}.w3lesson-video-panel{--lab-cyan:#66e4ff;--lab-gold:#ffd166;--lab-ink:#f7fbff;--lab-mint:#75f0a0;--lab-muted:#a8b8c8;--lab-radius:8px;--lab-mono:var(--font-mono,"JetBrains Mono","SFMono-Regular",Menlo,Monaco,Consolas,monospace);background:linear-gradient(180deg,rgba(18,156,186,0.98),rgba(7,13,21,0.98)),rgba(7,13,21,0.98);border:1px solid rgba(102,228,255,0.24);border-radius:var(--lab-radius);bottom:84px;box-shadow:0 24px 70px rgba(0,0,0,0.48),0 0 0 1px rgba(255,255,255,0.035),inset 0 1px 0 rgba(255,255,255,0.06);max-width:min(560px,calc(100vw - 28px));overflow:hidden;position:fixed;right:22px;width:560px;z-index:54}.w3lesson-video-panel[hidden]{display:none}.w3lesson-video-panel-head{align-items:center;border-bottom:1px solid rgba(135,206,255,0.14);display:flex;gap:14px;justify-content:space-between;padding:13px 14px}.w3lesson-video-panel-head div{display:grid;gap:4px;min-width:0}.w3lesson-video-panel-head span{color:var(--lab-cyan);font:900 0.6rem/1 var(--lab-mono);letter-spacing:0.1em;text-transform:uppercase}.w3lesson-video-panel-head strong{color:var(--lab-ink);font-weight:850;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.w3lesson-video-panel-head button{background:rgba(255,255,255,0.06);border:1px solid rgba(135,206,255,0.2);border-radius:999px;color:var(--lab-muted);cursor:pointer;font-weight:800;min-height:34px;padding:0 12px}.w3lesson-video-panel-head button:hover{border-color:rgba(102,228,255,0.34);color:var(--lab-ink)}.w3lesson-video-frame{aspect-ratio:16 / 9}.w3lesson-solution-body{display:grid;gap:14px;padding-bottom:14px}.w3lesson-video-frame.yt-facade-container{border-radius:0}.w3lesson-video-frame .yt-facade-img{inset:0;position:absolute}.w3lesson-solution-link{background:linear-gradient(180deg,rgba(18,156,186,0.82),rgba(7,13,21,0.92));border:1px solid rgba(117,240,160,0.18);border-radius:12px;color:var(--lab-ink);display:grid;gap:7px;margin:0 14px;padding:16px;text-decoration:none;transition:border-color 160ms ease,box-shadow 160ms ease,transform 160ms ease}.w3lesson-solution-link:hover,.w3lesson-solution-link:focus-visible{border-color:rgba(117,240,160,0.34);box-shadow:0 16px 34px rgba(117,240,160,0.08);outline:none;transform:translateY(-1px)}.w3lesson-solution-link span{color:var(--lab-mint);font:900 0.64rem/1 var(--lab-mono);letter-spacing:0.12em;text-transform:uppercase}.w3lesson-solution-link strong{color:var(--lab-ink);font:800 0.98rem/1.3 var(--lab-mono)}.w3lesson-solution-link small{color:var(--lab-muted);font-size:0.83rem;line-height:1.45}.w3lesson .w3lab-context{margin-bottom:16px}body.w3lab-has-special-unlock{overflow:hidden}.w3lab-special-unlock{align-items:center;display:grid;inset:0;justify-items:center;padding:20px;position:fixed;z-index:140}.w3lab-special-unlock[hidden]{display:none}.w3lab-special-unlock-backdrop{backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);background:radial-gradient(circle at 50% 18%,rgba(255,209,102,0.13),transparent 27rem),radial-gradient(circle at 72% 76%,rgba(102,228,255,0.1),transparent 30rem),rgba(5,7,8,0.86);inset:0;position:absolute}.w3lab-special-unlock-card{animation:w3lab-special-unlock-enter 480ms cubic-bezier(0.2,0.78,0.2,1) both;background:radial-gradient(circle at 50% -12%,rgba(255,209,102,0.2),transparent 20rem),radial-gradient(circle at 100% 100%,rgba(102,228,255,0.09),transparent 22rem),linear-gradient(155deg,rgba(18,156,186,0.99),rgba(7,13,21,0.995) 58%,rgba(7,13,21,0.995));border:1px solid rgba(255,209,102,0.42);border-radius:20px;box-shadow:0 40px 110px rgba(0,0,0,0.68),0 0 58px rgba(255,209,102,0.1),inset 0 1px 0 rgba(255,255,255,0.08);display:grid;gap:18px;isolation:isolate;justify-items:center;max-height:calc(100svh - 40px);max-width:min(660px,calc(100vw - 28px));overflow:hidden auto;padding:38px 42px 34px;position:relative;text-align:center;width:660px}.w3lab-special-unlock-card::before{background-image:linear-gradient(rgba(255,209,102,0.045) 1px,transparent 1px),linear-gradient(90deg,rgba(102,228,255,0.035) 1px,transparent 1px);background-size:32px 32px;content:"";inset:0;mask-image:linear-gradient(180deg,#000,transparent 78%);opacity:0.72;pointer-events:none;position:absolute;z-index:-2}.w3lab-special-unlock-card::after{animation:w3lab-special-unlock-scan 4.8s ease-in-out infinite;background:linear-gradient(90deg,transparent,rgba(255,230,171,0.36),rgba(102,228,255,0.24),transparent);content:"";height:1px;left:7%;pointer-events:none;position:absolute;right:7%;top:0;z-index:2}.w3lab-special-unlock-close{align-items:center;background:rgba(255,255,255,0.045);border:1px solid rgba(135,206,255,0.16);border-radius:9px;color:var(--lab-muted);cursor:pointer;display:inline-flex;font:900 0.82rem/1 var(--lab-mono);height:36px;justify-content:center;position:absolute;right:16px;top:16px;transition:background 160ms ease,border-color 160ms ease,color 160ms ease;width:36px;z-index:4}.w3lab-special-unlock-close:hover,.w3lab-special-unlock-close:focus-visible{background:rgba(102,228,255,0.1);border-color:rgba(102,228,255,0.36);color:#ffffff;outline:none}.w3lab-special-unlock-mark{align-items:center;animation:w3lab-special-unlock-mark 3.2s ease-in-out infinite;background:linear-gradient(145deg,rgba(255,209,102,0.18),rgba(102,228,255,0.08)),var(--lab-bg);border:1px solid rgba(255,209,102,0.68);border-radius:18px;box-shadow:0 0 0 7px rgba(255,209,102,0.055),0 18px 46px rgba(0,0,0,0.34),inset 0 0 22px rgba(102,228,255,0.08);display:inline-flex;height:70px;justify-content:center;margin:4px 0 2px;transform:rotate(45deg);width:70px}.w3lab-special-unlock-mark span{color:var(--lab-gold);font:950 1.35rem/1 var(--lab-mono);letter-spacing:0.08em;transform:rotate(-45deg)}.w3lab-special-unlock-card .w3lab-kicker{color:var(--lab-gold);font-size:0.7rem;letter-spacing:0.2em;margin:2px 0 -6px}.w3lab-special-unlock-card h2{background:linear-gradient(92deg,var(--lab-gold-bright) 0%,var(--lab-gold) 42%,var(--lab-mint) 72%,var(--lab-cyan) 100%);background-clip:text;-webkit-background-clip:text;color:transparent;font:950 clamp(2.65rem,6vw,4.1rem)/0.98 var(--lab-heading);letter-spacing:-0.045em;margin:0;text-wrap:balance}.w3lab-special-unlock-copy{color:var(--lab-muted);font-size:1.06rem;line-height:1.6;margin:0;max-width:34rem;text-wrap:balance}.w3lab-special-unlock-actions{display:grid;gap:10px;grid-template-columns:minmax(0,0.8fr) minmax(0,1.35fr);margin-top:2px;width:100%}.w3lab-special-unlock-actions button{align-items:center;border-radius:10px;cursor:pointer;display:inline-flex;font:900 0.84rem/1 var(--lab-sans);justify-content:center;min-height:50px;overflow:hidden;padding:0 18px;position:relative;transition:background 220ms ease,border-color 220ms ease,box-shadow 220ms ease,color 220ms ease,transform 220ms ease;white-space:nowrap}.w3lab-special-unlock-actions button::before{background:linear-gradient(90deg,transparent,rgba(255,255,255,0.32),transparent);content:"";inset:0;pointer-events:none;position:absolute;transform:translateX(-120%);transition:transform 560ms ease}.w3lab-special-unlock-actions button:hover::before{transform:translateX(120%)}.w3lab-special-unlock-actions button:first-child{background:linear-gradient(180deg,rgba(255,255,255,0.055),transparent),rgba(7,16,25,0.92);border:1px solid rgba(135,206,255,0.24);box-shadow:inset 0 1px 0 rgba(255,255,255,0.055);color:var(--lab-cyan-bright)}.w3lab-special-unlock-actions button:first-child:hover,.w3lab-special-unlock-actions button:first-child:focus-visible{background:rgba(135,206,255,0.1);border-color:rgba(135,206,255,0.48);box-shadow:0 12px 28px rgba(0,0,0,0.24),inset 0 1px 0 rgba(255,255,255,0.1);color:#ffffff;outline:none;transform:translateY(-2px)}#w3lab-special-unlock-begin{background:linear-gradient(135deg,var(--lab-mint-deep) 0%,var(--lab-cyan-deep) 100%);border:1px solid rgba(102,228,255,0.5);box-shadow:0 14px 32px rgba(20,184,77,0.26),0 0 40px rgba(102,228,255,0.2);color:#ffffff;gap:10px;text-shadow:0 1px 10px rgba(7,13,21,0.5)}#w3lab-special-unlock-begin::after{content:"→";font-size:1rem;transition:transform 220ms ease}#w3lab-special-unlock-begin:hover,#w3lab-special-unlock-begin:focus-visible{border-color:rgba(255,255,255,0.42);box-shadow:0 20px 46px rgba(20,184,77,0.34),0 0 58px rgba(102,228,255,0.3);outline:none;transform:translateY(-2px)}#w3lab-special-unlock-begin:hover::after{transform:translateX(3px)}@keyframes w3lab-special-unlock-enter{from{opacity:0;transform:translateY(18px) scale(0.975)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes w3lab-special-unlock-mark{0%,100%{box-shadow:0 0 0 7px rgba(255,209,102,0.055),0 18px 46px rgba(0,0,0,0.34),inset 0 0 22px rgba(102,228,255,0.08)}50%{box-shadow:0 0 0 10px rgba(255,209,102,0.035),0 18px 52px rgba(0,0,0,0.4),0 0 34px rgba(255,209,102,0.13),inset 0 0 24px rgba(102,228,255,0.11)}}@keyframes w3lab-special-unlock-scan{0%,100%{opacity:0.2;transform:translateY(0)}50%{opacity:0.78;transform:translateY(510px)}}@media (max-width:560px){.w3lab-special-unlock{padding:12px}.w3lab-special-unlock-card{border-radius:16px;gap:15px;max-height:calc(100svh - 24px);padding:30px 20px 20px}.w3lab-special-unlock-close{right:12px;top:12px}.w3lab-special-unlock-mark{border-radius:15px;height:58px;margin-top:2px;width:58px}.w3lab-special-unlock-card h2{font-size:clamp(1.75rem,8vw,2.3rem);white-space:nowrap}.w3lab-special-unlock-copy{font-size:0.93rem;line-height:1.52}.w3lab-special-unlock-actions{grid-template-areas:"begin" "dismiss";grid-template-columns:minmax(0,1fr)}.w3lab-special-unlock-actions button:first-child{grid-area:dismiss}#w3lab-special-unlock-begin{grid-area:begin}}@media (prefers-reduced-motion:reduce){.w3lab-special-unlock-card,.w3lab-special-unlock-card::after,.w3lab-special-unlock-mark{animation:none}}body.w3lab-has-promo{overflow:hidden}.w3lab-promo{align-items:center;display:grid;inset:0;justify-items:center;padding:20px;position:fixed;z-index:141}.w3lab-promo[hidden]{display:none}.w3lab-promo-backdrop{backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);background:radial-gradient(circle at 50% 14%,rgba(255,209,102,0.2),transparent 30rem),radial-gradient(circle at 76% 80%,rgba(102,228,255,0.08),transparent 30rem),rgba(5,7,8,0.88);inset:0;position:absolute}.w3lab-promo-card{animation:w3lab-special-unlock-enter 480ms cubic-bezier(0.2,0.78,0.2,1) both;background:radial-gradient(circle at 50% -10%,rgba(255,209,102,0.22),transparent 22rem),radial-gradient(circle at 100% 100%,rgba(102,228,255,0.08),transparent 24rem),linear-gradient(155deg,rgba(18,156,186,0.99),rgba(7,13,21,0.995) 58%,rgba(7,13,21,0.995));border:1px solid rgba(255,209,102,0.5);border-radius:20px;box-shadow:0 40px 110px rgba(0,0,0,0.68),0 0 58px rgba(255,209,102,0.12),inset 0 1px 0 rgba(255,255,255,0.08);display:grid;gap:18px;isolation:isolate;justify-items:center;max-height:calc(100svh - 40px);max-width:min(680px,calc(100vw - 28px));outline:none;overflow:hidden auto;padding:42px 44px 32px;position:relative;text-align:center;width:680px}.w3lab-promo-card::before{background-image:linear-gradient(rgba(255,209,102,0.045) 1px,transparent 1px),linear-gradient(90deg,rgba(102,228,255,0.035) 1px,transparent 1px);background-size:34px 34px;content:"";inset:0;mask-image:linear-gradient(180deg,#000,transparent 82%);opacity:0.7;pointer-events:none;position:absolute;z-index:-2}.w3lab-promo-close{align-items:center;background:rgba(255,255,255,0.045);border:1px solid rgba(255,209,102,0.24);border-radius:9px;color:var(--lab-muted);cursor:pointer;display:inline-flex;font:900 0.82rem/1 var(--lab-mono);height:36px;justify-content:center;position:absolute;right:16px;top:16px;transition:background 160ms ease,border-color 160ms ease,color 160ms ease;width:36px;z-index:4}.w3lab-promo-close:hover,.w3lab-promo-close:focus-visible{background:rgba(255,209,102,0.12);border-color:rgba(255,209,102,0.44);color:#ffffff;outline:none}.w3lab-promo:not([hidden]) .w3lab-reward-glyphs span{animation:w3lab-reward-glyph 2.7s cubic-bezier(0.17,0.8,0.22,1) forwards}.w3lab-promo-mark{align-items:center;animation:w3lab-special-unlock-mark 3.2s ease-in-out infinite;background:linear-gradient(145deg,rgba(255,209,102,0.2),rgba(102,228,255,0.06)),var(--lab-bg);border:1px solid rgba(255,209,102,0.7);border-radius:18px;box-shadow:0 0 0 7px rgba(255,209,102,0.06),0 18px 46px rgba(0,0,0,0.34),inset 0 0 22px rgba(102,228,255,0.08);display:inline-flex;height:72px;justify-content:center;margin:2px 0;transform:rotate(45deg);width:72px}.w3lab-promo-mark .w3icon{color:var(--lab-gold);font-size:1.9rem;transform:rotate(-45deg)}.w3lab-promo-card h2{animation:w3lab-promo-shine 4s linear infinite;background-image:linear-gradient(90deg,var(--lab-gold) 0%,var(--lab-gold-bright) 25%,var(--lab-cyan) 50%,var(--lab-gold-bright) 75%,var(--lab-gold) 100%);background-size:200% auto;background-clip:text;-webkit-background-clip:text;color:transparent;-webkit-text-fill-color:transparent;font:950 clamp(2.1rem,4.4vw,2.9rem)/1.04 var(--lab-heading);letter-spacing:-0.04em;margin:0;text-wrap:balance}@keyframes w3lab-promo-shine{0%{background-position:0% center}100%{background-position:200% center}}.w3lab-promo-copy{color:var(--lab-gold);font:800 1.05rem/1.4 var(--lab-sans);letter-spacing:0.01em;margin:-4px 0 0}.w3lab-promo-prizes{align-items:stretch;display:grid;gap:10px;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);width:100%}.w3lab-promo-or{align-self:center;background:rgba(7,13,21,0.92);border:1px solid rgba(255,255,255,0.14);border-radius:999px;color:var(--lab-dim);font:900 0.72rem/1 var(--lab-mono);justify-self:center;letter-spacing:0.12em;padding:9px 10px;text-transform:uppercase}.w3lab-promo-prize{align-content:center;background:linear-gradient(165deg,rgba(18,156,186,0.96),rgba(7,13,21,0.98));border:1px solid rgba(255,209,102,0.28);border-radius:16px;display:grid;gap:7px;justify-items:center;min-height:96px;padding:20px 18px;text-align:center}.w3lab-promo-prize.is-clear{border-color:rgba(102,228,255,0.32)}.w3lab-promo-prize.is-grind{border-color:rgba(255,209,102,0.38)}.w3lab-promo-prize h3{color:var(--lab-ink);font:900 clamp(1.08rem,1.6vw,1.3rem)/1.3 var(--lab-heading);margin:0;text-wrap:balance}.w3lab-promo-prize-sub{color:var(--lab-dim);font:700 0.72rem/1.4 var(--lab-mono);letter-spacing:0.08em;margin:0;text-transform:uppercase}.w3lab-promo-hl{animation:w3lab-promo-shine 3s linear infinite;background-image:linear-gradient(90deg,var(--lab-gold) 0%,var(--lab-gold-bright) 25%,var(--lab-cyan) 50%,var(--lab-gold-bright) 75%,var(--lab-gold) 100%);background-size:200% auto;background-clip:text;-webkit-background-clip:text;color:transparent;-webkit-text-fill-color:transparent;font-weight:900}.w3lab-promo-countdown{display:grid;gap:8px;justify-items:center}.w3lab-promo-countdown-label{color:var(--lab-muted);font:800 0.68rem/1 var(--lab-mono);letter-spacing:0.18em;text-transform:uppercase}.w3lab-promo-countdown.is-expired .w3lab-promo-countdown-label{color:var(--lab-red)}.w3lab-promo-countdown-grid{align-items:stretch;display:flex;gap:10px}.w3lab-promo-count-cell{background:rgba(7,13,21,0.9);border:1px solid rgba(255,209,102,0.3);border-radius:12px;display:grid;gap:3px;justify-items:center;min-width:80px;padding:13px 10px 10px}.w3lab-promo-count-cell strong{color:var(--lab-gold);font:900 1.85rem/1 var(--lab-mono);font-variant-numeric:tabular-nums}.w3lab-promo-count-cell small{color:var(--lab-dim);font:800 0.62rem/1 var(--lab-mono);letter-spacing:0.14em;text-transform:uppercase}.w3lab-promo-actions{display:grid;gap:10px;grid-template-columns:minmax(0,1.35fr) minmax(0,0.8fr);margin-top:2px;width:100%}.w3lab-promo-actions.is-solo{grid-template-columns:minmax(0,1fr)}.w3lab-promo-cta{align-items:center;border-radius:12px;cursor:pointer;display:inline-flex;font:900 0.98rem/1 var(--lab-sans);justify-content:center;min-height:58px;overflow:hidden;padding:0 18px;position:relative;text-decoration:none;transition:background 220ms ease,border-color 220ms ease,box-shadow 220ms ease,color 220ms ease,transform 220ms ease;white-space:nowrap}.w3lab-promo-cta::before{background:linear-gradient(90deg,transparent,rgba(255,255,255,0.32),transparent);content:"";inset:0;pointer-events:none;position:absolute;transform:translateX(-120%);transition:transform 560ms ease}.w3lab-promo-cta:hover::before{transform:translateX(120%)}.w3lab-promo-cta.is-primary{background:linear-gradient(135deg,var(--lab-gold-bright) 0%,var(--lab-gold) 46%,var(--lab-gold) 100%);border:1px solid rgba(255,230,171,0.7);box-shadow:0 14px 32px rgba(255,209,102,0.22),0 0 40px rgba(255,209,102,0.18);color:var(--lab-void);text-shadow:0 1px 8px rgba(255,230,171,0.35)}.w3lab-promo-cta.is-primary:hover,.w3lab-promo-cta.is-primary:focus-visible{border-color:rgba(255,255,255,0.7);box-shadow:0 20px 46px rgba(255,209,102,0.3),0 0 58px rgba(255,209,102,0.28);outline:none;transform:translateY(-2px)}.w3lab-promo-cta.is-ghost{background:linear-gradient(180deg,rgba(255,255,255,0.055),transparent),rgba(7,16,25,0.92);border:1px solid rgba(135,206,255,0.24);box-shadow:inset 0 1px 0 rgba(255,255,255,0.055);color:var(--lab-cyan-bright)}.w3lab-promo-cta.is-ghost:hover,.w3lab-promo-cta.is-ghost:focus-visible{background:rgba(135,206,255,0.1);border-color:rgba(135,206,255,0.48);box-shadow:0 12px 28px rgba(0,0,0,0.24),inset 0 1px 0 rgba(255,255,255,0.1);color:#ffffff;outline:none;transform:translateY(-2px)}.w3lab-promo-fineprint{color:var(--lab-dim);font-size:0.78rem;line-height:1.55;margin:0;max-width:40rem}.w3lab-arena-menu-panel a[data-promo-menu-item]{align-items:center;background:var(--lab-code);border:1px solid rgba(255,209,102,0.30);border-radius:2px;column-gap:10px;display:grid;grid-template-columns:auto minmax(0,1fr) auto;margin-bottom:5px;min-height:54px;padding:9px 11px}.w3lab-arena-menu-panel a[data-promo-menu-item]::after{content:none}.w3lab-arena-menu-panel a[data-promo-menu-item]:hover,.w3lab-arena-menu-panel a[data-promo-menu-item]:focus-visible{background:var(--lab-code);border-color:var(--lab-gold-deep)}.w3lab-promo-menu-glyph{color:var(--lab-gold);font-size:1.05rem}.w3lab-promo-menu-copy{display:grid;gap:4px}.w3lab-promo-menu-copy strong{color:var(--lab-gold);font:850 0.8rem/1 var(--lab-mono)}.w3lab-promo-menu-copy small{color:var(--lab-gold);font:700 0.6rem/1 var(--lab-mono);letter-spacing:0.07em;text-transform:uppercase}.w3lab-promo-menu-clock{background:var(--lab-void);border:1px solid rgba(255,209,102,0.30);border-radius:2px;color:var(--lab-gold-bright);font:800 0.66rem/1 var(--lab-mono);font-variant-numeric:tabular-nums;padding:5px 7px;white-space:nowrap}.w3lab-arena-menu-panel a[hidden]{display:none}@media (max-width:640px){.w3lab-promo{padding:12px}.w3lab-promo-card{border-radius:16px;gap:13px;max-height:calc(100svh - 24px);padding:30px 18px 20px}.w3lab-promo-close{right:12px;top:12px}.w3lab-promo-card h2{font-size:clamp(1.85rem,8.4vw,2.4rem)}.w3lab-promo-copy{font-size:1rem;line-height:1.5}.w3lab-promo-mark{border-radius:15px;height:66px;width:66px}.w3lab-promo-mark .w3icon{font-size:1.75rem}.w3lab-promo-prizes{grid-template-columns:1fr}.w3lab-promo-prize{min-height:0;padding:18px 16px}.w3lab-promo-prize h3{font-size:1.12rem}.w3lab-promo-count-cell{min-width:64px;padding:10px 7px 8px}.w3lab-promo-count-cell strong{font-size:1.4rem}.w3lab-promo-actions{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){.w3lab-promo-card,.w3lab-promo-mark,.w3lab-promo-card h2,.w3lab-promo-hl,.w3lab-promo:not([hidden]) .w3lab-reward-glyphs span{animation:none}}.w3lab-has-confirm{overflow:hidden}.w3lab-confirm{align-items:center;display:grid;inset:0;justify-items:center;padding:18px;position:fixed;z-index:80}.w3lab-confirm[hidden]{display:none}.w3lab-confirm-backdrop{backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);background:radial-gradient(circle at 50% 22%,rgba(102,228,255,0.13),transparent 30rem),rgba(5,7,8,0.82);inset:0;position:absolute}.w3lab-confirm-card{background:radial-gradient(circle at 100% 0%,rgba(255,209,102,0.16),transparent 15rem),linear-gradient(160deg,rgba(18,156,186,0.98),rgba(7,13,21,0.98)),rgba(7,13,21,0.98);border:1px solid rgba(255,209,102,0.24);border-radius:18px;box-shadow:0 32px 90px rgba(0,0,0,0.58),0 0 0 1px rgba(255,255,255,0.04),inset 0 1px 0 rgba(255,255,255,0.08);display:grid;gap:20px;max-width:min(560px,calc(100vw - 28px));padding:36px;position:relative;width:560px}.w3lab-confirm-card h2{color:var(--lab-ink);font:900 clamp(2rem,4vw,2.7rem)/1.04 var(--lab-heading);letter-spacing:-0.035em;margin:0}.w3lab-confirm-card p:not(.w3lab-kicker){color:var(--lab-muted);font-size:1rem;line-height:1.5;margin:0}.w3lab-confirm-cost{align-items:center;background:rgba(255,209,102,0.09);border:1px solid rgba(255,209,102,0.24);border-radius:12px;display:flex;justify-content:space-between;min-height:64px;padding:12px 16px;width:100%}.w3lab-confirm-cost span{color:var(--lab-ink);font:850 0.78rem/1 var(--lab-mono);letter-spacing:0.06em;text-transform:uppercase}.w3lab-confirm-cost strong{color:var(--lab-gold);font:950 1.3rem/1 var(--lab-mono)}.w3lab-confirm-actions{display:grid;gap:10px;grid-template-columns:repeat(2,minmax(0,1fr));margin-top:2px}.w3lab-confirm-actions button{border-radius:11px;cursor:pointer;font-weight:900;min-height:54px;padding:0 16px;transition:background 200ms ease,border-color 200ms ease,box-shadow 200ms ease,color 200ms ease,transform 200ms ease}#w3lab-confirm-cancel{background:rgba(255,255,255,0.055);border:1px solid rgba(135,206,255,0.17);color:var(--lab-ink)}#w3lab-confirm-cancel:hover{background:rgba(135,206,255,0.12);border-color:rgba(135,206,255,0.4);color:#ffffff;transform:translateY(-2px)}#w3lab-confirm-accept{background:linear-gradient(135deg,var(--lab-mint-deep) 0%,var(--lab-cyan-deep) 100%);border:1px solid rgba(102,228,255,0.5);box-shadow:0 12px 30px rgba(20,184,77,0.24),0 0 34px rgba(102,228,255,0.18);color:#ffffff;text-shadow:0 1px 10px rgba(7,13,21,0.5)}#w3lab-confirm-accept:hover{border-color:rgba(255,255,255,0.42);box-shadow:0 18px 40px rgba(20,184,77,0.32),0 0 50px rgba(102,228,255,0.28);transform:translateY(-2px)}@media (max-width:560px){.w3lab-confirm{padding:14px}.w3lab-confirm-card{border-radius:15px;gap:17px;padding:28px 22px 22px}.w3lab-confirm-card h2{font-size:2rem}.w3lab-confirm-actions{grid-template-areas:"accept" "cancel";grid-template-columns:minmax(0,1fr)}#w3lab-confirm-accept{grid-area:accept}#w3lab-confirm-cancel{grid-area:cancel}}.w3lab-has-onboarding{overflow:hidden}.w3lab-onboarding{--tour-card-left:24px;--tour-card-top:24px;--tour-h:120px;--tour-w:260px;--tour-x:24px;--tour-y:24px;inset:0;position:fixed;z-index:120}.w3lab-onboarding[hidden]{display:none}.w3lab-onboarding-backdrop{inset:0;position:absolute}.w3lab-onboarding-spotlight{border:2px solid rgba(102,228,255,0.9);border-radius:16px;box-shadow:0 0 0 9999px rgba(5,7,8,0.76),0 0 34px rgba(102,228,255,0.26),inset 0 0 24px rgba(117,240,160,0.08);height:var(--tour-h);left:var(--tour-x);pointer-events:none;position:absolute;top:var(--tour-y);transition:height 220ms ease,left 220ms ease,top 220ms ease,width 220ms ease;width:var(--tour-w)}.w3lab-onboarding-card{background:radial-gradient(circle at 92% 6%,rgba(117,240,160,0.17),transparent 12rem),linear-gradient(160deg,rgba(18,156,186,0.98),rgba(7,13,21,0.98));border:1px solid rgba(102,228,255,0.26);border-radius:8px;box-shadow:0 28px 80px rgba(0,0,0,0.55),0 0 0 1px rgba(255,255,255,0.04),inset 0 1px 0 rgba(255,255,255,0.08);color:var(--lab-ink);display:grid;gap:13px;left:var(--tour-card-left);max-width:min(374px,calc(100vw - 28px));padding:20px;position:fixed;top:var(--tour-card-top);transition:left 220ms ease,top 220ms ease;width:374px}.w3lab-onboarding-card>.w3lab-kicker{margin:0;padding-right:48px}.w3lab-onboarding-card:focus{outline:none}.w3lab-onboarding-close{align-items:center;background:rgba(255,255,255,0.055);border:1px solid rgba(135,206,255,0.17);border-radius:999px;color:var(--lab-ink);cursor:pointer;display:inline-flex;font:900 0.9rem/1 var(--lab-mono);height:34px;justify-content:center;margin:0;position:absolute;right:20px;top:20px;width:34px;z-index:1}.w3lab-onboarding-card h2{color:var(--lab-ink);font:900 1.52rem/1.08 var(--lab-heading);margin:0}.w3lab-onboarding-card p:not(.w3lab-kicker){color:var(--lab-muted);font-size:0.98rem;line-height:1.55;margin:0}.w3lab-onboarding-dots{display:flex;gap:7px;margin-top:3px}.w3lab-onboarding-dots span{background:rgba(135,206,255,0.22);border-radius:999px;height:7px;transition:width 180ms ease,background 180ms ease;width:7px}.w3lab-onboarding-dots span.is-active{background:linear-gradient(135deg,var(--lab-mint),var(--lab-cyan));width:24px}.w3lab-onboarding-actions{display:grid;gap:9px;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:4px}.w3lab-onboarding-actions button{border-radius:999px;cursor:pointer;font-weight:900;min-height:43px;min-width:0;padding:0 15px;transition:background 200ms ease,border-color 200ms ease,box-shadow 200ms ease,color 200ms ease,transform 200ms ease}#w3lab-onboarding-skip,#w3lab-onboarding-back{background:rgba(255,255,255,0.055);border:1px solid rgba(135,206,255,0.17);color:var(--lab-ink)}#w3lab-onboarding-skip:hover,#w3lab-onboarding-back:hover:not(:disabled){background:rgba(135,206,255,0.12);border-color:rgba(135,206,255,0.4);color:#ffffff}#w3lab-onboarding-back:disabled{cursor:not-allowed;opacity:0.44}#w3lab-onboarding-next{background:linear-gradient(135deg,var(--lab-mint-deep) 0%,var(--lab-cyan-deep) 100%);border:1px solid rgba(102,228,255,0.5);box-shadow:0 12px 30px rgba(20,184,77,0.24),0 0 34px rgba(102,228,255,0.18);color:#ffffff;text-shadow:0 1px 10px rgba(7,13,21,0.5)}#w3lab-onboarding-next:hover{border-color:rgba(255,255,255,0.42);box-shadow:0 18px 40px rgba(20,184,77,0.32),0 0 50px rgba(102,228,255,0.28)}@media (max-width:700px){.w3lab-onboarding-actions{grid-template-columns:repeat(3,minmax(0,1fr))}.w3lab-onboarding-actions button{padding-inline:10px}#w3lab-onboarding-skip{grid-column:auto}}@media (max-width:980px){.w3lesson-shell{grid-template-columns:1fr}.w3lesson-reader{border-right:0;max-height:none}.w3lesson-workspace{min-height:760px}.w3lesson-console{min-height:0}}@media (max-width:560px){.w3lesson-reader-inner{padding:22px 16px}.w3lesson-reader h1{font-size:1.8rem}.w3lesson-review-pass{align-items:stretch;grid-template-columns:1fr}.w3lesson-review-pass a{width:100%}.w3lesson-editor-head{align-items:flex-start;flex-direction:column}.w3lesson-editor-badges{justify-content:flex-start}.w3lesson-editor-wrap{grid-template-columns:42px minmax(0,1fr)}.w3lesson-lines{font-size:0.78rem;padding-right:9px}#w3lab-editor{font-size:0.82rem;padding:14px}.w3lesson-actionbar{grid-template-columns:1fr;padding:10px}.w3lesson-actionbar-actions{--action-button-height:50px;--action-button-width:100%;display:grid;grid-template-columns:minmax(0,1fr);width:100%}.w3lesson-actionbar-actions button{font-size:0.82rem;justify-content:center;min-width:0;padding:0 10px;width:100%}.w3lesson-actionbar-actions #w3lab-hint,.w3lesson-actionbar-actions #w3lab-hints-open,.w3lesson-actionbar-actions #w3lab-video-trigger,.w3lesson-actionbar-actions #w3lab-run{min-width:0}.w3lesson-video-panel{left:10px;max-width:none;right:10px;width:auto}.w3lab-checker-summary{align-items:center;grid-template-columns:24px minmax(0,1fr);padding:12px}.w3lab-checker-summary button{grid-column:1 / -1;width:100%}.w3lab-reward-burst-card{min-height:0;padding:24px 18px 22px}.w3lab-reward-burst.is-daily .w3lab-reward-burst-card{padding:24px 16px 20px}.w3lab-reward-burst.is-daily .w3lab-kicker{margin-bottom:12px}.w3lab-reward-burst.is-daily h2.has-token-title{gap:10px}.w3lab-reward-title-token{height:52px;width:52px}.w3lab-reward-lines{gap:8px;grid-template-columns:repeat(2,minmax(0,1fr));margin-top:18px;max-width:300px}.w3lab-reward-line{min-height:66px;padding:10px 8px}.w3lab-reward-burst.is-daily .w3lab-reward-lines{gap:8px;justify-content:center;margin-top:16px;max-width:320px}.w3lab-reward-burst.is-daily .w3lab-reward-line{min-height:66px;padding:10px 12px}.w3lab-reward-burst.is-share .w3lab-reward-lines{max-width:320px}.w3lab-reward-burst.is-daily .w3lab-reward-lines strong{font-size:0.84rem}.w3lab-reward-lines strong{font-size:1.08rem}.w3lab-reward-lines small{font-size:0.54rem;letter-spacing:0.06em}.w3lab-reward-next{font-size:0.82rem;margin-top:18px;min-height:42px;min-width:140px;padding:0 18px}.w3lab-reward-burst.is-daily .w3lab-reward-next{min-height:46px;min-width:min(100%,220px)}.w3lesson-hints-panel{left:10px;max-width:none;right:10px;width:auto}.w3profile-referral-box{grid-template-columns:1fr}.w3profile-referral-box button{width:100%}.w3lab-victory-card .w3lab-victory-actions{gap:8px;margin-top:16px}.w3lab-victory-card .w3lab-victory-actions a,.w3lab-victory-card .w3lab-victory-actions button{min-height:42px}.w3lab-victory-fireworks{inset:-74px -12px -18px;overflow:hidden}.w3lab-victory-fireworks.is-canvas-active .w3lab-victory-firework-canvas{opacity:0.48}.w3lab-failure-mark{height:64px;margin-bottom:16px;width:64px}.w3lab-failure-message{padding:14px}.w3profile-referral-box code{overflow:visible;overflow-wrap:anywhere;text-overflow:clip;white-space:normal}.w3lab-daily-card,.w3lab-referral-card{grid-template-columns:minmax(0,1fr) auto}.w3lab-daily-card button,.w3lab-referral-card button{min-width:96px}}@media (max-width:430px){.w3lab-account-panel{gap:9px;padding:10px}.w3lab-account-card .w3lab-avatar.is-large{height:46px;width:46px}.w3lab-rank-card,.w3lab-daily-card,.w3lab-referral-card{border-radius:9px}.w3lab-account-stats{gap:7px}.w3lab-account-stats>span{min-height:54px;padding:8px}.w3lab-account-stats strong{font-size:0.7rem}.w3lab-account-stats small{font-size:0.46rem}}@media (max-width:1439px){.w3lesson .w3lab-topbar{grid-template-areas:"brand actions" "hud hud" "levels levels";grid-template-columns:minmax(0,1fr) auto;min-height:154px}.w3lesson .w3lab-account-menu summary{min-width:58px;padding:0 10px}.w3lesson .w3lab-account-menu summary>.w3lab-daily-claim-marker{right:10px;top:50%;transform:translateY(-50%)}.w3lesson .w3lab-account-copy{display:none}.w3lesson-shell{min-height:calc(100vh - 154px)}.w3lesson-level-rail{padding-bottom:2px}}@media (max-width:820px){.w3lesson .w3lab-topbar{grid-template-areas:"brand" "hud" "levels" "actions";grid-template-columns:minmax(0,1fr);min-height:0}.w3lesson-level-rail{margin:0 -2px}.w3lesson .w3lab-topbar-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));height:auto;overflow:hidden}.w3lesson .w3lab-topbar-actions>a,.w3lesson .w3lab-topbar-actions>button,.w3lesson .w3lab-topbar-actions>details>summary{min-height:54px;min-width:0}.w3lesson .w3lab-topbar-actions .w3lab-login-pill{grid-column:1 / -1}.w3lesson-level-rail a,.w3lesson-level-rail>span{min-width:0}.w3lesson-shell{min-height:0}}@media (max-width:560px){.w3lesson-level-rail a,.w3lesson-level-rail>span{grid-template-columns:auto max-content auto;height:42px;min-width:0}.w3lesson-level-rail em{display:inline-flex}}.w3lesson .w3lab-hud{--hud-brass:#ffd166;--hud-brass-hot:#ffe6ab;--hud-ember:#ff6b8a;--hud-rune:#66e4ff;--hud-venom:#75f0a0;background:radial-gradient(circle at 12% 50%,rgba(255,230,171,0.16),transparent 15rem),radial-gradient(circle at 76% 46%,rgba(102,228,255,0.14),transparent 22rem),linear-gradient(180deg,rgba(7,16,25,0.98),rgba(7,16,25,0.98) 54%,rgba(7,13,21,0.98));border:1px solid rgba(255,209,102,0.42);border-radius:18px;box-shadow:0 18px 50px rgba(0,0,0,0.34),0 0 0 1px rgba(102,228,255,0.08),0 0 42px rgba(102,228,255,0.08),inset 0 0 0 1px rgba(255,255,255,0.055),inset 0 1px 0 rgba(255,230,171,0.18),inset 0 -18px 30px rgba(0,0,0,0.26);gap:20px;grid-template-columns:max-content minmax(390px,1fr) minmax(200px,240px);isolation:isolate;min-height:76px;padding:8px 14px}.w3lesson .w3lab-exp,.w3lesson .w3lab-scorebar{position:relative;z-index:1}.w3lesson .w3lab-exp{background:linear-gradient(180deg,rgba(102,228,255,0.085),rgba(7,13,21,0.5)),rgba(7,13,21,0.42);border:1px solid rgba(102,228,255,0.18);border-radius:11px;box-shadow:inset 0 1px 0 rgba(255,255,255,0.08),inset 0 -1px 0 rgba(102,228,255,0.08);gap:6px;padding:7px 10px}.w3lesson .w3lab-exp-rank{align-items:center;gap:7px 10px;grid-template-columns:auto minmax(0,1fr) max-content}.w3lesson .w3lab-exp-rank span{align-items:center;background:linear-gradient(180deg,rgba(255,230,171,0.96),rgba(255,209,102,0.9));border:1px solid rgba(255,230,171,0.64);border-radius:999px;box-shadow:0 0 0 3px rgba(255,209,102,0.1),0 0 20px rgba(255,107,138,0.12),inset 0 1px 0 rgba(255,255,255,0.58);color:var(--lab-code);display:inline-flex;height:26px;letter-spacing:0.08em;padding:0 11px;text-shadow:0 1px 0 rgba(255,255,255,0.22)}.w3lesson .w3lab-exp-rank strong{color:var(--lab-ink);font-size:clamp(0.92rem,1.08vw,1.06rem);line-height:1.08;min-width:0;overflow:visible;text-shadow:0 0 14px rgba(102,228,255,0.24),0 1px 0 rgba(0,0,0,0.38);text-overflow:clip;white-space:nowrap}.w3lesson .w3lab-exp-rank small{background:rgba(5,7,8,0.58);border:1px solid rgba(255,230,171,0.18);border-radius:999px;color:var(--hud-brass-hot);justify-self:end;padding:5px 9px}.w3lesson .w3lab-exp-rank em{color:rgba(171,240,255,0.78);display:none;letter-spacing:0.08em}.w3lesson .w3lab-exp-track{background:repeating-linear-gradient(90deg,rgba(255,255,255,0.045) 0 1px,transparent 1px 10%),linear-gradient(180deg,rgba(0,0,0,0.46),rgba(7,16,25,0.9));border-color:rgba(102,228,255,0.25);box-shadow:0 0 0 1px rgba(5,7,8,0.62),0 0 24px rgba(102,228,255,0.1),inset 0 0 0 1px rgba(255,255,255,0.05),inset 0 -10px 18px rgba(0,0,0,0.34);height:16px}.w3lesson .w3lab-exp-track>span{animation:w3lab-hud-exp-flow 3.6s linear infinite;background:linear-gradient(90deg,rgba(255,255,255,0.28),transparent 18%,rgba(255,255,255,0.18) 36%,transparent 54%),linear-gradient(90deg,var(--hud-brass-hot),var(--hud-venom) 54%,var(--hud-rune));background-size:180px 100%,100% 100%;box-shadow:0 0 18px rgba(117,240,160,0.38),0 0 26px rgba(102,228,255,0.28),inset 0 1px 0 rgba(255,255,255,0.38)}.w3lesson .w3lab-exp-percent{color:rgba(255,230,171,0.92);font-size:0.66rem}.w3lesson .w3lab-exp.is-level-syncing{border-color:rgba(255,230,171,0.38);box-shadow:0 0 0 1px rgba(255,230,171,0.08),0 0 34px rgba(102,228,255,0.16),inset 0 1px 0 rgba(255,255,255,0.12),inset 0 -1px 0 rgba(102,228,255,0.14);overflow:hidden}.w3lesson .w3lab-exp.is-level-syncing::before{animation:w3lab-level-sync-scan 1450ms ease-out both;background:linear-gradient(90deg,transparent,rgba(255,230,171,0.38),rgba(102,228,255,0.28),transparent);content:"";inset:-30% auto -30% -40%;pointer-events:none;position:absolute;transform:skewX(-18deg);width:40%;z-index:0}.w3lesson .w3lab-exp.is-level-syncing .w3lab-exp-track{border-color:rgba(255,230,171,0.42);box-shadow:0 0 0 1px rgba(5,7,8,0.62),0 0 28px rgba(255,230,171,0.18),0 0 38px rgba(102,228,255,0.16),inset 0 0 0 1px rgba(255,255,255,0.08),inset 0 -10px 18px rgba(0,0,0,0.34)}.w3lesson .w3lab-exp.is-level-syncing .w3lab-exp-track>span{transition:width 120ms linear}.w3lesson .w3lab-exp.is-exp-gain .w3lab-exp-track>span{box-shadow:0 0 22px rgba(255,230,171,0.42),0 0 32px rgba(102,228,255,0.34),inset 0 1px 0 rgba(255,255,255,0.52)}.w3lesson .w3lab-exp.is-exp-gain .w3lab-exp-percent,.w3lesson .w3lab-exp.is-exp-gain .w3lab-exp-rank small{color:var(--lab-gold-bright);text-shadow:0 0 12px rgba(255,230,171,0.28),0 0 18px rgba(102,228,255,0.16)}.w3lesson .w3lab-exp.is-threshold-hit .w3lab-exp-track{animation:w3lab-exp-threshold-track 780ms cubic-bezier(0.18,0.88,0.24,1) both}.w3lesson .w3lab-exp.is-threshold-hit .w3lab-exp-track::before{animation:w3lab-exp-threshold-wave 760ms ease-out both;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.86),rgba(255,230,171,0.82),transparent);content:"";inset:0 auto 0 -35%;position:absolute;width:34%;z-index:2}.w3lesson .w3lab-exp-rank span.is-swapping{animation:w3lab-level-badge-swap 760ms cubic-bezier(0.18,0.92,0.22,1) both}.w3lesson .w3lab-exp-rank strong.is-decoding{color:var(--hud-rune);text-shadow:0 0 16px rgba(102,228,255,0.45),0 0 28px rgba(255,230,171,0.18)}.w3lesson .w3lab-exp.is-rank-swapping .w3lab-exp-rank small{animation:w3lab-exp-chip-pop 640ms ease-out both}.w3lesson .w3lab-exp.is-settled{animation:w3lab-exp-settled-glow 2200ms ease-out both}.w3lesson .w3lab-scorebar>span{background:radial-gradient(circle at 21% 50%,rgba(255,230,171,0.26),transparent 4.8rem),radial-gradient(circle at 84% 22%,rgba(117,240,160,0.22),transparent 6rem),linear-gradient(135deg,rgba(255,255,255,0.095),transparent 36%),rgba(7,13,21,0.68);border-color:rgba(255,209,102,0.44);border-radius:11px;box-shadow:0 16px 42px rgba(0,0,0,0.32),0 0 28px rgba(117,240,160,0.1),inset 0 1px 0 rgba(255,255,255,0.16),inset 0 -1px 0 rgba(117,240,160,0.2);grid-template-columns:42px max-content;min-height:54px;padding:7px 13px 7px 10px}.w3lesson .w3lab-token-balance::before{background:linear-gradient(115deg,transparent 8%,rgba(255,255,255,0.2) 18%,transparent 34%),linear-gradient(180deg,rgba(255,230,171,0.16),transparent 52%)}.w3lesson .w3lab-hp-token{height:42px;width:42px}.w3lesson .w3lab-scorebar .w3lab-token-balance strong{color:var(--lab-mint);font-size:0.98rem;letter-spacing:0.08em;text-shadow:0 0 14px rgba(117,240,160,0.42),0 0 22px rgba(255,230,171,0.12)}.w3lesson .w3lab-token-balance small{color:rgba(171,240,255,0.78);letter-spacing:0.12em}@keyframes w3lab-hud-exp-flow{from{background-position:0 0,0 0}to{background-position:180px 0,0 0}}@keyframes w3lab-level-sync-scan{0%{opacity:0;transform:translateX(0) skewX(-18deg)}18%{opacity:0.9}100%{opacity:0;transform:translateX(420%) skewX(-18deg)}}@keyframes w3lab-exp-threshold-track{0%,100%{transform:translateX(0)}16%{box-shadow:0 0 0 1px rgba(255,230,171,0.44),0 0 42px rgba(255,230,171,0.34),0 0 54px rgba(102,228,255,0.22),inset 0 0 0 1px rgba(255,255,255,0.14);transform:translateX(-1px)}32%{transform:translateX(1px)}48%{transform:translateX(-1px)}}@keyframes w3lab-exp-threshold-wave{0%{opacity:0;transform:translateX(0)}18%{opacity:1}100%{opacity:0;transform:translateX(410%)}}@keyframes w3lab-level-badge-swap{0%{filter:brightness(1);transform:translateY(0) rotateX(0deg) scale(1)}36%{filter:brightness(1.35);transform:translateY(-2px) rotateX(76deg) scale(0.96)}68%{filter:brightness(1.22);transform:translateY(-2px) rotateX(0deg) scale(1.12)}100%{filter:brightness(1);transform:translateY(0) rotateX(0deg) scale(1)}}@keyframes w3lab-exp-chip-pop{0%{opacity:0.72;transform:translateY(3px) scale(0.94)}48%{opacity:1;transform:translateY(-1px) scale(1.08)}100%{opacity:1;transform:translateY(0) scale(1)}}@keyframes w3lab-exp-settled-glow{0%{box-shadow:0 0 0 1px rgba(255,230,171,0.2),0 0 44px rgba(102,228,255,0.18),inset 0 1px 0 rgba(255,255,255,0.12)}100%{box-shadow:inset 0 1px 0 rgba(255,255,255,0.08),inset 0 -1px 0 rgba(102,228,255,0.08)}}@media (min-width:1440px) and (max-width:1800px){.w3lesson .w3lab-hud{gap:9px;grid-template-columns:max-content minmax(330px,1fr) minmax(163px,193px);min-height:70px;padding:7px}.w3lesson .w3lab-mission-summary strong{max-width:220px}.w3lesson .w3lab-exp{padding:7px 9px}.w3lesson .w3lab-exp-rank strong{font-size:0.86rem}.w3lesson .w3lab-exp-track{height:15px}.w3lesson .w3lab-scorebar{box-sizing:border-box;padding-right:12px}.w3lesson .w3lab-scorebar>span{grid-template-columns:34px max-content;min-height:54px;padding:7px 9px 7px 8px;width:min(100%,178px)}.w3lesson .w3lab-hp-token{height:34px;width:34px}.w3lesson .w3lab-scorebar .w3lab-token-balance strong{font-size:0.9rem}}@media (max-width:1439px){.w3lesson .w3lab-hud{grid-template-columns:max-content minmax(370px,1fr) minmax(200px,230px);min-height:74px}}@media (max-width:980px){.w3lesson .w3lab-hud{grid-template-columns:minmax(0,1fr)}}@media (max-width:640px){.w3lesson .w3lab-hud{border-radius:14px;gap:10px;padding:10px}.w3lesson .w3lab-exp,.w3lesson .w3lab-scorebar>span{border-radius:11px}.w3lesson .w3lab-exp-rank{grid-template-columns:auto minmax(0,1fr) auto}.w3lesson .w3lab-exp-rank span{justify-self:start}.w3lesson .w3lab-exp-rank small{justify-self:end}.w3lesson .w3lab-scorebar>span{justify-content:start;width:100%}}@media (prefers-reduced-motion:reduce){.w3lesson .w3lab-exp-track>span{animation:none}}.w3lesson-level-rail a.is-bonus{background:linear-gradient(180deg,rgba(255,209,102,0.12),rgba(255,209,102,0.025)),rgba(5,7,8,0.72);border-color:rgba(255,209,102,0.36)}.w3lesson-level-rail a.is-bonus strong{color:var(--lab-gold-bright)}.w3lesson-level-rail a.is-bonus:hover{background:rgba(255,209,102,0.14);border-color:rgba(255,209,102,0.58)}.w3lesson-level-rail a.is-bonus.is-active{background:linear-gradient(135deg,rgba(255,209,102,0.24),rgba(255,209,102,0.1)),rgba(5,7,8,0.94);border-color:rgba(255,209,102,0.66);box-shadow:0 0 0 1px rgba(255,209,102,0.1),0 0 24px rgba(255,209,102,0.16),inset 0 1px 0 rgba(255,255,255,0.07)}.w3lesson-level-rail a.is-bonus.is-solved{border-color:rgba(255,209,102,0.46)}.is-bonus-challenge .w3lesson-title-row .w3lab-kicker{color:var(--lab-gold)}.is-bonus-challenge .w3lab-ethernaut-mark{background:linear-gradient(135deg,var(--lab-gold-bright),var(--lab-gold));border-color:rgba(255,209,102,0.55);box-shadow:inset 0 1px 0 rgba(255,255,255,0.6);color:var(--lab-code);font:900 0.62rem/1 var(--lab-mono);letter-spacing:0.16em;min-width:52px;padding:4px 12px;width:auto}.w3lesson-source-link.is-bonus{border-color:rgba(255,209,102,0.32)}.w3lesson-source-link.is-bonus:hover,.w3lesson-source-link.is-bonus:focus-visible{background:rgba(255,209,102,0.08);border-color:rgba(255,209,102,0.58)}.w3lesson-source-link.is-bonus strong{color:var(--lab-gold-bright)}.is-bonus-challenge .w3lab-level-tip .w3lab-level-label{color:var(--lab-gold-bright)}.is-bonus-challenge .w3lesson-reader h1{font-size:clamp(2.1rem,3.2vw,3.35rem);letter-spacing:-0.035em}.w3lesson-bonus-callout{align-items:start;border:1px solid rgba(255,209,102,0.32);border-radius:10px;column-gap:12px;display:grid;grid-template-columns:7px minmax(0,1fr);row-gap:6px;margin:20px 0 0;padding:7px 14px;background:linear-gradient(90deg,rgba(255,209,102,0.09),transparent 72%);transition:border-color 180ms ease}.w3lesson-bonus-callout:hover{border-color:rgba(255,209,102,0.6)}.w3lesson-reader .w3lesson-bonus-callout p{color:var(--lab-muted);font:600 0.82rem/1.4 var(--lab-sans);grid-column:2;grid-row:1;margin:0}.w3lesson-bonus-callout-spark{background:linear-gradient(135deg,var(--lab-gold-bright),var(--lab-gold));box-shadow:0 0 10px rgba(255,209,102,0.7);display:inline-block;flex:0 0 auto;grid-column:1;grid-row:1;height:7px;margin-top:6px;width:7px;rotate:45deg;border-radius:2px}.w3lesson-bonus-callout a{color:var(--lab-gold-bright);font:800 0.78rem/1.2 var(--lab-sans);grid-column:2;grid-row:2;justify-self:start;text-decoration:none;white-space:nowrap}.w3lesson-bonus-callout a:hover{color:var(--lab-gold-bright);text-decoration:underline;text-underline-offset:3px}.w3lesson-bonus-callout a:focus-visible{border-radius:2px;color:var(--lab-gold-bright);outline:2px solid rgba(255,230,171,0.9);outline-offset:3px;text-decoration:underline;text-underline-offset:3px}@media (max-width:560px){.is-bonus-challenge .w3lesson-reader h1{font-size:2.15rem}}.w3lesson{--lab-muted:#a8b8c8;--lab-dim:#728498;--lesson-frame-inset:14px;--lesson-reader-column:500px;overflow-x:clip;padding-bottom:0}.w3lesson .w3lab-topbar{background:rgba(7,13,21,0.98);border-bottom-color:rgba(102,228,255,0.14);gap:8px 14px;grid-template-areas:"command player hud";grid-template-columns:minmax(238px,max-content) max-content minmax(600px,1fr);grid-template-rows:auto;min-height:0;padding:8px 18px}.w3lab-player-console{display:contents}.w3lab-command-left{align-items:center;display:flex;gap:18px;grid-area:command;min-width:0}.w3lesson .w3lab-command-left .w3lab-brand{flex:0 0 auto}.w3lab-arena-menu{position:relative}.w3lab-arena-menu>summary{border-radius:9px;cursor:pointer;list-style:none;margin:-5px 0 -5px -5px;padding:5px 10px 5px 5px;transition:background 160ms ease,box-shadow 160ms ease}.w3lab-arena-menu>summary::-webkit-details-marker{display:none}.w3lab-arena-menu>summary::after{border-bottom:2px solid var(--lab-dim);border-right:2px solid var(--lab-dim);content:"";height:7px;margin-left:2px;transform:rotate(45deg) translateY(-2px);transition:border-color 160ms ease,transform 160ms ease;width:7px}.w3lab-arena-menu[open]>summary,.w3lab-arena-menu>summary:hover,.w3lab-arena-menu>summary:focus-visible{background:rgba(102,228,255,0.065);box-shadow:inset 0 0 0 1px rgba(102,228,255,0.14);outline:none}.w3lab-arena-menu[open]>summary::after{border-color:var(--lab-cyan);transform:rotate(225deg) translate(-2px,-1px)}.w3lab-arena-menu-panel{background:linear-gradient(145deg,rgba(102,228,255,0.06),transparent 52%),rgba(7,13,21,0.99);border:1px solid rgba(102,228,255,0.22);border-radius:9px;box-shadow:0 22px 52px rgba(0,0,0,0.52);display:grid;gap:3px;left:0;min-width:210px;padding:7px;position:absolute;top:calc(100%+7px);width:max-content;z-index:90}.w3lab-arena-menu:not([open])>.w3lab-arena-menu-panel{display:none}.w3lab-arena-menu-panel a{align-items:center;border-radius:7px;color:var(--lab-cyan-bright);display:flex;font-size:0.8rem;font-weight:850;justify-content:space-between;min-height:40px;padding:0 11px;text-decoration:none;transition:background 150ms ease,color 150ms ease}.w3lab-arena-menu-panel a::after{color:var(--lab-dim);content:"›";font:800 0.72rem/1 var(--lab-mono)}.w3lab-arena-menu-panel a:hover,.w3lab-arena-menu-panel a:focus-visible{background:rgba(102,228,255,0.09);color:#ffffff;outline:none}.w3lab-primary-nav{align-items:center;display:flex;gap:3px;min-width:0}.w3lab-primary-nav>a,.w3lab-primary-nav>.w3lab-dev-menu>summary{align-items:center;border-radius:7px;color:var(--lab-muted);display:inline-flex;font-size:0.74rem;font-weight:850;justify-content:center;min-height:36px;padding:0 9px;text-decoration:none;transition:background 160ms ease,color 160ms ease;white-space:nowrap}.w3lab-primary-nav>a:hover,.w3lab-primary-nav>a:focus-visible,.w3lab-primary-nav>.w3lab-dev-menu>summary:hover,.w3lab-primary-nav>.w3lab-dev-menu>summary:focus-visible{background:rgba(102,228,255,0.08);color:var(--lab-ink);outline:none}.w3lab-primary-nav .w3lab-dev-menu summary{min-width:0}.w3lab-primary-nav .w3lab-dev-menu summary::before{content:none}.w3lab-primary-nav .w3lab-dev-menu-panel{left:0;right:auto}.w3lab-primary-nav .w3lab-dev-menu-panel button{align-items:center;background:rgba(255,255,255,0.045);border:1px solid rgba(135,206,255,0.12);border-radius:8px;color:var(--lab-ink);cursor:pointer;display:flex;font:900 0.66rem/1 var(--lab-mono);justify-content:flex-start;min-height:38px;padding:0 11px;width:100%}.w3lesson .w3lab-brand{justify-content:flex-start;min-height:56px}.w3lesson .w3lab-brand strong{font-size:1.12rem;letter-spacing:-0.015em}.w3lesson .w3lab-brand strong::after{content:none;display:none}.w3lesson .w3lab-hud{background:linear-gradient(90deg,rgba(102,228,255,0.045),transparent 72%),rgba(7,16,25,0.92);border-color:rgba(102,228,255,0.18);border-radius:9px;box-shadow:inset 0 1px 0 rgba(255,255,255,0.035);gap:10px;grid-area:hud;grid-template-columns:minmax(0,1fr);min-height:58px;padding:6px 8px}.w3lesson .w3lab-player-zone{align-self:stretch;align-items:stretch;background:rgba(7,16,25,0.92);border:1px solid rgba(102,228,255,0.18);border-radius:9px;box-shadow:inset 0 1px 0 rgba(255,255,255,0.035);display:flex;gap:0;grid-area:player;min-height:70px;padding:4px}.w3lesson .w3lab-player-zone .w3lab-scorebar{align-self:stretch;min-width:188px}.w3lesson .w3lab-player-zone .w3lab-scorebar>span{background:transparent;border:0;box-shadow:none;height:100%}.w3lesson .w3lab-player-zone .w3lab-account-menu{align-items:stretch;border-left:1px solid rgba(135,206,255,0.12);display:flex;margin-left:3px;padding-left:3px}.w3lesson .w3lab-player-zone 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72px - 52px - env(safe-area-inset-bottom,0px))}.w3lesson-reader{background:linear-gradient(180deg,rgba(7,16,25,0.64),transparent 18rem),var(--lab-code)}.w3lesson-reader-inner{display:flex;flex-direction:column;max-width:620px;min-height:100%;padding:clamp(28px,3vw,44px)}.w3lesson-reader h1,.is-bonus-challenge .w3lesson-reader h1{font-size:clamp(1.2rem,6.4vw,2.2rem);line-height:1.06;overflow:visible;text-overflow:clip;white-space:nowrap}.w3lesson-heading-row .w3lesson-source-link.is-bonus .w3lab-ethernaut-mark{width:auto}.w3lesson-reader h2{font-size:1.2rem;margin-top:26px}.w3lesson-reader p,.w3lesson-instruction-list{font-size:0.96rem;line-height:1.58}.w3lesson-starting-facts{display:grid;list-style:none;margin:10px 0 0;padding:0}.w3lesson-starting-facts li{color:var(--lab-muted);display:grid;font-size:0.96rem;gap:10px;grid-template-columns:8px minmax(0,1fr);line-height:1.5;padding:9px 0}.w3lesson-starting-facts li+li{border-top:1px solid rgba(135,206,255,0.1)}.w3lesson-starting-facts li::before{background:linear-gradient(135deg,var(--lab-gold-bright),var(--lab-gold));border-radius:2px;box-shadow:0 0 8px rgba(255,209,102,0.32);content:"";height:6px;margin-top:0.52em;rotate:45deg;width:6px}.w3lesson-instruction-list{counter-reset:objective;gap:7px;list-style:none;margin-top:12px}.w3lesson-instruction-list li{align-items:start;background:rgba(255,255,255,0.025);border:1px solid rgba(135,206,255,0.1);border-radius:7px;counter-increment:objective;display:grid;gap:10px;grid-template-columns:24px minmax(0,1fr);padding:10px 12px}.w3lesson-instruction-list li::before{align-items:center;background:rgba(117,240,160,0.08);border:1px solid rgba(117,240,160,0.2);border-radius:5px;color:var(--lab-mint);content:counter(objective);display:inline-flex;font:900 0.68rem/1 var(--lab-mono);height:22px;justify-content:center;width:22px}.w3lesson-review-pass{background:rgba(102,228,255,0.045);border-color:rgba(102,228,255,0.2);border-radius:8px;box-shadow:none;margin-top:20px;padding:13px 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.w3lab-ethernaut-mark{width:76px}.w3lesson-review-pass{align-items:start;grid-template-columns:minmax(0,1fr) auto}.w3lesson-review-badge{font-size:0.58rem;min-width:0;padding:0 8px}.w3lesson-actionbar{align-items:start;grid-template-columns:minmax(0,1fr);justify-items:end;padding:9px 10px}.w3lesson-actionbar-actions{width:100%}.w3lesson-workspace-cta{min-height:40px}.w3lesson-editor-tabs{overflow-x:auto}.w3lesson-editor-tabs button{flex:0 0 auto;min-width:150px}.w3lesson-preview-head{align-items:center;flex-direction:row}.w3lesson-preview-gate{align-items:stretch;gap:10px;grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){.w3lesson-editor-tabs button.w3lesson-tab-needs-attention:not(.is-active),.w3lesson-editor-tabs button.w3lesson-tab-needs-attention:not(.is-active) .w3file-icon{animation:none}}body.w3lab-has-locked-level{overflow:hidden}.w3lab-locked-level{align-items:center;display:flex;inset:0;justify-content:center;padding:20px;position:fixed;z-index:10040}.w3lab-locked-level[hidden]{display:none}.w3lab-locked-level-backdrop{animation:w3locked-backdrop-in 220ms ease-out both;backdrop-filter:blur(11px) saturate(0.62);background:radial-gradient(circle at 50% 40%,rgba(255,209,102,0.08),transparent 34rem),rgba(5,7,8,0.84);inset:0;position:absolute}.w3lab-locked-level-backdrop::before{background-image:linear-gradient(rgba(102,228,255,0.035) 1px,transparent 1px),linear-gradient(90deg,rgba(102,228,255,0.035) 1px,transparent 1px);background-size:36px 36px;content:'';inset:0;mask-image:radial-gradient(circle at center,#000,transparent 72%);position:absolute}.w3lab-locked-level-card{animation:w3locked-card-in 360ms cubic-bezier(0.2,0.9,0.25,1) both;background:linear-gradient(135deg,rgba(255,209,102,0.075),transparent 42%),linear-gradient(180deg,rgba(18,156,186,0.98),rgba(7,13,21,0.99));border:1px solid rgba(255,209,102,0.4);border-radius:14px;box-shadow:0 28px 90px rgba(0,0,0,0.64),0 0 0 1px rgba(255,255,255,0.025) inset,0 0 45px rgba(255,209,102,0.065);isolation:isolate;max-width:520px;overflow:hidden;padding:34px;position:relative;text-align:center;width:100%}.w3lab-locked-level-card::before,.w3lab-locked-level-card::after{content:'';pointer-events:none;position:absolute}.w3lab-locked-level-card::before{background:linear-gradient(90deg,transparent,var(--lab-gold),transparent);height:2px;left:12%;opacity:0.78;right:12%;top:0}.w3lab-locked-level-card::after{border:1px solid rgba(102,228,255,0.09);border-radius:10px;inset:8px;z-index:-1}.w3lab-locked-level-mark{align-items:center;background:radial-gradient(circle at 50% 38%,rgba(255,209,102,0.22),transparent 58%),rgba(255,209,102,0.07);border:1px solid rgba(255,209,102,0.36);border-radius:50%;box-shadow:0 0 28px rgba(255,209,102,0.1);display:flex;height:72px;justify-content:center;margin:0 auto 18px;position:relative;width:72px}.w3lab-locked-level-shackle{border:3px solid var(--lab-gold);border-bottom:0;border-radius:14px 14px 0 0;height:21px;position:absolute;top:16px;width:25px}.w3lab-locked-level-keyhole{background:linear-gradient(180deg,var(--lab-gold),var(--lab-gold-deep));border-radius:5px;box-shadow:0 0 16px rgba(255,209,102,0.28);height:26px;position:absolute;top:34px;width:34px}.w3lab-locked-level-keyhole::before,.w3lab-locked-level-keyhole::after{background:rgba(255,209,102,0.16);content:'';left:50%;position:absolute;transform:translateX(-50%)}.w3lab-locked-level-keyhole::before{border-radius:50%;height:6px;top:7px;width:6px}.w3lab-locked-level-keyhole::after{border-radius:1px;height:7px;top:11px;width:3px}.w3lab-locked-level-card h2{color:var(--lab-ink);font:900 clamp(1.85rem,5vw,2.45rem)/1 var(--lab-heading);letter-spacing:-0.035em;margin:0}.w3lab-locked-level-card>p:not(.w3lab-kicker){color:var(--lab-muted);font-size:0.95rem;line-height:1.62;margin:15px auto 0;max-width:410px}.w3lab-locked-level-card>p strong{color:var(--lab-cyan-bright);font-weight:850}.w3lab-locked-level-actions{display:grid;gap:9px;margin-top:18px}.w3lab-locked-level-action{align-items:center;background:linear-gradient(180deg,var(--lab-cyan),var(--lab-mint));border:1px solid var(--lab-mint-bright);border-radius:8px;box-shadow:0 10px 30px rgba(117,240,160,0.13);color:var(--lab-code);display:flex;font:950 0.88rem/1 var(--lab-heading);justify-content:center;min-height:50px;padding:0 18px;text-decoration:none;transition:background 160ms ease,box-shadow 160ms ease,transform 160ms ease}.w3lab-locked-level-action span{font-size:1.1rem;margin-left:10px;transition:transform 160ms ease}.w3lab-locked-level-action:hover{background:linear-gradient(180deg,var(--lab-cyan-bright),var(--lab-mint));box-shadow:0 12px 34px rgba(117,240,160,0.2);transform:translateY(-1px)}.w3lab-locked-level-action:hover span{transform:translateX(3px)}.w3lab-locked-level-action:focus-visible{outline:2px solid #fff;outline-offset:4px}.w3lab-locked-level-preview{align-items:center;background:rgba(102,228,255,0.055);border:1px solid rgba(102,228,255,0.2);border-radius:8px;color:var(--lab-muted);cursor:pointer;display:flex;font:850 0.82rem/1 var(--lab-heading);justify-content:center;min-height:44px;padding:0 18px;transition:background 160ms ease,border-color 160ms ease,color 160ms ease;width:100%}.w3lab-locked-level-preview::before{background:radial-gradient(circle,currentColor 0 2px,transparent 2.5px);border:1.5px solid currentColor;border-radius:50% / 62%;content:'';height:9px;margin-right:9px;opacity:0.72;width:15px}.w3lab-locked-level-preview:hover{background:rgba(102,228,255,0.1);border-color:rgba(102,228,255,0.38);color:var(--lab-cyan-bright)}.w3lab-locked-level-preview:focus-visible{outline:2px solid #fff;outline-offset:2px}@keyframes w3locked-backdrop-in{from{opacity:0}to{opacity:1}}@keyframes w3locked-card-in{from{opacity:0;transform:translateY(14px) scale(0.975)}to{opacity:1;transform:translateY(0) scale(1)}}@media (max-width:560px){.w3lab-locked-level{align-items:flex-end;padding:10px}.w3lab-locked-level-card{border-radius:14px;padding:28px 20px 20px}.w3lab-locked-level-mark{height:62px;margin-bottom:15px;width:62px}.w3lab-locked-level-shackle{top:12px}.w3lab-locked-level-keyhole{top:30px}}@media (prefers-reduced-motion:reduce){.w3lab-locked-level-backdrop,.w3lab-locked-level-card{animation:none}.w3lab-locked-level-action,.w3lab-locked-level-action span,.w3lab-locked-level-preview{transition:none}}.w3lab-arena-menu .w3lab-brand{position:relative}.w3lab-brand .w3quest-brand-badge{position:absolute;top:-2px;right:-8px;min-width:1.15rem;height:1.15rem;padding:0 0.3rem;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;background:var(--lab-gold);color:var(--lab-void);font:950 0.62rem/1 var(--lab-mono);box-shadow:0 0 0 2px var(--lab-bg);animation:w3questPulse 1.8s ease-in-out infinite;pointer-events:none}.w3lab-brand .w3quest-brand-badge[hidden]{display:none}.w3lab-arena-menu-panel a[data-quest-open].has-claimable{color:var(--lab-gold)}@keyframes w3questPulse{0%,100%{box-shadow:0 0 0 2px var(--lab-bg),0 0 0 0 rgba(255,209,102,0.55)}50%{box-shadow:0 0 0 2px var(--lab-bg),0 0 0 6px rgba(255,209,102,0)}}.w3quest-backdrop{position:fixed;inset:0;background:rgba(5,7,8,0.62);backdrop-filter:blur(2px);opacity:0;transition:opacity 0.3s ease;z-index:70}.w3quest-backdrop.is-open{opacity:1}.w3quest-board{position:fixed;top:0;right:0;height:100dvh;width:min(430px,94vw);display:flex;flex-direction:column;background:linear-gradient(180deg,rgba(7,16,25,0.98),rgba(7,13,21,0.98));border-left:1px solid var(--lab-line-strong);box-shadow:-24px 0 60px rgba(5,7,8,0.6);transform:translateX(100%);transition:transform 0.34s cubic-bezier(0.22,1,0.36,1);z-index:71}.w3quest-board.is-open{transform:translateX(0)}.w3quest-head{display:flex;align-items:center;gap:0.6rem;padding:1.1rem 1.15rem;border-bottom:1px solid var(--lab-line)}.w3quest-head-glyph{color:var(--lab-gold);font-size:1.1rem}.w3quest-title{flex:1;color:var(--lab-ink);font:950 1.02rem/1 var(--lab-display);letter-spacing:0.04em;text-transform:uppercase}.w3quest-close{width:2rem;height:2rem;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--lab-line);border-radius:8px;background:transparent;color:var(--lab-muted);font-size:1.3rem;cursor:pointer;transition:border-color 0.2s ease,color 0.2s ease}.w3quest-close:hover{border-color:var(--lab-cyan);color:var(--lab-ink)}.w3quest-tabs{display:flex;gap:0.4rem;padding:0.85rem 1.15rem 0}.w3quest-tab{flex:1;padding:0.55rem 0.4rem;border:1px solid var(--lab-line);border-radius:8px 8px 0 0;background:transparent;color:var(--lab-dim);font:900 0.66rem/1 var(--lab-mono);letter-spacing:0.08em;text-transform:uppercase;cursor:pointer;transition:color 0.2s ease,border-color 0.2s ease,background 0.2s ease}.w3quest-tab{position:relative}.w3quest-tab-badge{position:absolute;top:-7px;right:-5px;min-width:1.05rem;height:1.05rem;padding:0 0.28rem;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;background:var(--lab-gold);color:var(--lab-void);font:950 0.6rem/1 var(--lab-mono);box-shadow:0 0 0 2px var(--lab-bg);pointer-events:none}.w3quest-tab-badge[hidden]{display:none}.w3quest-tab:hover{color:var(--lab-ink);border-color:var(--lab-line-strong)}.w3quest-tab.is-active{color:var(--lab-ink);border-color:var(--lab-line-strong);background:rgba(102,228,255,0.08)}.w3quest-body{flex:1;overflow-y:auto;padding:1rem 1.15rem 1.5rem}.w3quest-tabpanel{display:none}.w3quest-tabpanel.is-active{display:block}.w3quest-reset{margin:0 0 0.9rem;color:var(--lab-dim);font:850 0.64rem/1 var(--lab-mono);letter-spacing:0.06em;text-transform:uppercase}.w3quest-reset-clock{color:var(--lab-cyan);font-variant-numeric:tabular-nums}.w3quest-list,.w3quest-chains{display:flex;flex-direction:column;gap:0.75rem}.w3quest-empty{margin:0;padding:1.5rem 1rem;text-align:center;color:var(--lab-dim);font:700 0.82rem/1.5 var(--lab-sans)}.w3quest-card{--q:var(--lab-cyan);position:relative;padding:0.9rem 1rem;border:1px solid var(--lab-line);border-radius:var(--lab-radius);background:var(--lab-panel-soft);transition:border-color 0.2s ease,box-shadow 0.2s ease,transform 0.2s ease}.w3quest-card.is-mint{--q:var(--lab-mint)}.w3quest-card.is-cyan{--q:var(--lab-cyan)}.w3quest-card.is-violet{--q:var(--lab-violet)}.w3quest-card.is-gold{--q:var(--lab-gold)}.w3quest-card:hover{border-color:color-mix(in srgb,var(--q) 60%,transparent)}.w3quest-card.is-completed{border-color:var(--q);box-shadow:0 0 0 1px color-mix(in srgb,var(--q) 45%,transparent),0 10px 30px rgba(5,7,8,0.4)}.w3quest-card.is-locked{opacity:0.55}.w3quest-card.is-claimed{padding:0.6rem 1rem;opacity:0.72}.w3quest-card-head{display:flex;align-items:center;gap:0.55rem}.w3quest-gem{width:1.7rem;height:1.7rem;display:inline-flex;align-items:center;justify-content:center;border-radius:7px;border:1px solid color-mix(in srgb,var(--q) 55%,transparent);background:color-mix(in srgb,var(--q) 16%,transparent);color:var(--q);font-size:0.9rem;flex:none}.w3quest-card-title{flex:1;color:var(--lab-ink);font:900 0.94rem/1.1 var(--lab-heading)}.w3quest-rarity{color:var(--q);font:900 0.56rem/1 var(--lab-mono);letter-spacing:0.1em;text-transform:uppercase}.w3quest-card-desc{margin:0.55rem 0 0;color:var(--lab-muted);font:600 0.8rem/1.45 var(--lab-sans)}.w3quest-card.is-claimed .w3quest-card-desc{display:none}.w3quest-meter{display:flex;align-items:center;gap:0.6rem;margin-top:0.7rem}.w3quest-meter-track{flex:1;height:7px;border-radius:999px;background:rgba(135,206,255,0.14);overflow:hidden}.w3quest-meter-fill{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,color-mix(in srgb,var(--q) 70%,transparent),var(--q));transition:width 0.5s cubic-bezier(0.22,1,0.36,1)}.w3quest-meter-count{color:var(--lab-dim);font:900 0.66rem/1 var(--lab-mono);font-variant-numeric:tabular-nums}.w3quest-locked{display:flex;align-items:center;gap:0.4rem;margin:0.6rem 0 0;color:var(--lab-dim);font:700 0.74rem/1.3 var(--lab-sans)}.w3quest-lock-glyph{color:var(--lab-dim)}.w3quest-card-foot{display:flex;align-items:center;justify-content:space-between;gap:0.6rem;margin-top:0.85rem}.w3quest-card.is-claimed .w3quest-card-foot{margin-top:0.4rem}.w3quest-reward{display:inline-flex;gap:0.4rem;flex-wrap:wrap}.w3quest-chip{padding:0.28rem 0.55rem;border-radius:999px;font:950 0.62rem/1 var(--lab-mono);letter-spacing:0.04em;white-space:nowrap}.w3quest-chip--hp{background:color-mix(in srgb,var(--lab-mint) 18%,transparent);color:var(--lab-mint)}.w3quest-chip--xp{background:color-mix(in srgb,var(--lab-gold) 18%,transparent);color:var(--lab-gold)}.w3quest-claim{padding:0.5rem 1.1rem;border:1px solid var(--q);border-radius:999px;background:color-mix(in srgb,var(--q) 20%,transparent);color:var(--lab-ink);font:950 0.68rem/1 var(--lab-mono);letter-spacing:0.08em;text-transform:uppercase;cursor:pointer;animation:w3questClaimPulse 1.6s ease-in-out infinite;transition:background 0.2s ease,transform 0.15s ease}.w3quest-claim:hover{background:color-mix(in srgb,var(--q) 34%,transparent);transform:translateY(-1px)}.w3quest-claim.is-claiming{opacity:0.6;cursor:default;animation:none}@keyframes w3questClaimPulse{0%,100%{box-shadow:0 0 0 0 color-mix(in srgb,var(--q) 45%,transparent)}50%{box-shadow:0 0 0 5px transparent}}.w3quest-claimed{display:inline-flex;align-items:center;gap:0.3rem;color:var(--lab-mint);font:900 0.66rem/1 var(--lab-mono);letter-spacing:0.06em;text-transform:uppercase}.w3quest-claimed::before{content:"\2713";font-size:0.85rem}.w3quest-chain{margin-bottom:0.4rem}.w3quest-chain-title{margin:0 0 0.7rem;color:var(--lab-gold);font:950 0.72rem/1 var(--lab-mono);letter-spacing:0.1em;text-transform:uppercase}.w3quest-chain-track{position:relative;display:flex;flex-direction:column;gap:0.75rem;padding-left:1.1rem}.w3quest-chain-track::before{content:"";position:absolute;left:4px;top:0.6rem;bottom:0.6rem;width:2px;background:linear-gradient(180deg,var(--lab-line-strong),rgba(135,206,255,0.05))}.w3quest-chain-track .w3quest-card::before{content:"";position:absolute;left:-1.1rem;top:1.1rem;width:10px;height:10px;border-radius:999px;border:2px solid var(--q);background:var(--lab-bg)}.w3quest-chain-track .w3quest-card.is-claimed::before{background:var(--q)}.w3quest-coin-fly{position:fixed;width:18px;height:18px;border-radius:999px;background:radial-gradient(circle at 35% 30%,var(--lab-gold-bright),var(--lab-gold) 60%,var(--lab-gold-deep));box-shadow:0 0 10px rgba(255,209,102,0.7);pointer-events:none;z-index:90;transform:translate(-50%,-50%);animation:w3questCoinFly 0.75s cubic-bezier(0.5,0,0.75,0.4) forwards;animation-delay:var(--w3q-delay,0ms)}@keyframes w3questCoinFly{0%{opacity:0;transform:translate(-50%,-50%) scale(0.5)}15%{opacity:1;transform:translate(-50%,-50%) scale(1)}100%{opacity:0;transform:translate(calc(-50%+var(--w3q-dx)),calc(-50%+var(--w3q-dy))) scale(0.4)}}.w3quest-ribbon{position:fixed;top:5.5rem;left:50%;display:inline-flex;align-items:center;gap:0.7rem;padding:0.7rem 1.2rem;border:1px solid var(--lab-gold);border-radius:999px;background:linear-gradient(135deg,rgba(5,7,8,0.96),rgba(7,16,25,0.96));box-shadow:0 12px 40px rgba(5,7,8,0.55);transform:translate(-50%,-14px);opacity:0;transition:opacity 0.3s ease,transform 0.3s cubic-bezier(0.22,1,0.36,1);pointer-events:none;z-index:92}.w3quest-ribbon.is-live{opacity:1;transform:translate(-50%,0)}.w3quest-ribbon-glyph{color:var(--lab-gold);font-size:1.15rem}.w3quest-ribbon-copy{display:flex;flex-direction:column;gap:0.15rem}.w3quest-ribbon-copy small{color:var(--lab-gold);font:900 0.56rem/1 var(--lab-mono);letter-spacing:0.14em;text-transform:uppercase}.w3quest-ribbon-copy strong{color:var(--lab-ink);font:900 0.92rem/1 var(--lab-heading)}@media (max-width:560px){.w3quest-board{width:100vw;border-left:none}}@media (prefers-reduced-motion:reduce){.w3quest-board{transition:none}.w3quest-brand-badge,.w3quest-claim,.w3quest-meter-fill,.w3quest-coin-fly,.w3quest-ribbon{animation:none;transition:none}}.w3lab-page{--lab-bg:#050708;--lab-ink:#b3f7cb;--lab-muted:#a8b8c8;--lab-dim:#728498;--lab-panel:#050708;--lab-panel-soft:#070d15;--lab-line:rgba(114,132,152,0.2);--lab-line-strong:rgba(117,240,160,0.42);--lab-code:#050708;--lab-cyan:#66e4ff;--lab-mint:#75f0a0;--lab-gold:#ffd166;--lab-red:#ff6b8a;--lab-violet:#cdc0ff;--lab-radius:3px;background:var(--lab-void)}.w3lab-page::before{background-image:none}.w3lesson,.w3lesson *{letter-spacing:0 !important}.w3lesson .w3lab-topbar{background:var(--lab-void);border-bottom:1px solid rgba(117,240,160,0.16);padding:7px 14px}.w3lesson .w3lab-brand{min-height:54px}.w3lesson .w3lab-brand>span:first-child{background:var(--lab-code);border:1px solid rgba(117,240,160,0.16);border-radius:3px;box-shadow:none;height:42px;width:42px}.w3lesson .w3lab-brand strong{color:var(--lab-mint-bright);font-family:var(--lab-mono);font-size:0.98rem;font-weight:800}.w3lab-arena-menu>summary{border-radius:3px}.w3lab-arena-menu[open]>summary,.w3lab-arena-menu>summary:hover,.w3lab-arena-menu>summary:focus-visible{background:var(--lab-code);box-shadow:inset 0 0 0 1px rgba(117,240,160,0.16)}.w3lab-arena-menu-panel{background:var(--lab-void);border:1px solid rgba(117,240,160,0.30);border-radius:3px;box-shadow:0 18px 42px rgba(0,0,0,0.58);padding:5px}.w3lab-arena-menu-panel a{border-radius:2px;font-family:var(--lab-mono)}.w3lab-arena-menu-panel a:hover,.w3lab-arena-menu-panel a:focus-visible{background:var(--lab-bg);color:var(--lab-mint)}.w3lesson .w3lab-player-console,.w3lesson .w3lab-hud,.w3lesson .w3lab-player-zone,.w3lesson .w3lab-exp,.w3lesson .w3lab-scorebar>span{background:var(--lab-void);box-shadow:none}.w3lesson .w3lab-player-console{border:1px solid rgba(117,240,160,0.16);border-radius:3px}.w3lesson .w3lab-exp,.w3lesson 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