.w3tracks .w3profile-shell,.w3track .w3profile-shell{gap:clamp(20px,3vw,34px)}.is-accent-cyan{--track-accent:var(--lab-cyan);--track-bright:var(--lab-cyan-bright);--track-deep:var(--lab-cyan-deep)}.is-accent-mint{--track-accent:var(--lab-mint);--track-bright:var(--lab-mint-bright);--track-deep:var(--lab-mint-deep)}.is-accent-gold{--track-accent:var(--lab-gold);--track-bright:var(--lab-gold-bright);--track-deep:var(--lab-gold-deep)}.is-accent-violet{--track-accent:var(--lab-violet);--track-bright:var(--lab-violet-bright);--track-deep:var(--lab-violet-deep)}.is-accent-red{--track-accent:var(--lab-red);--track-bright:var(--lab-red-bright);--track-deep:var(--lab-red-deep)}.w3track-ico{background-color:currentColor;display:inline-block;flex:none;height:1.05em;-webkit-mask-position:center;mask-position:center;-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;-webkit-mask-size:contain;mask-size:contain;vertical-align:-.16em;width:1.05em}.w3track-ico.is-levels{-webkit-mask-image:url("../images/ctfs/icon-levels.svg");mask-image:url("../images/ctfs/icon-levels.svg")}.w3track-ico.is-hours{-webkit-mask-image:url("../images/ctfs/icon-hours.svg");mask-image:url("../images/ctfs/icon-hours.svg")}.w3track-ico.is-lock{-webkit-mask-image:url("../images/ctfs/icon-lock.svg");mask-image:url("../images/ctfs/icon-lock.svg")}.w3track-ico.is-solved{-webkit-mask-image:url("../images/ctfs/icon-solved.svg");mask-image:url("../images/ctfs/icon-solved.svg")}.w3track-rank-meter{align-items:flex-end;display:inline-flex;flex:none;gap:3px}.w3track-rank-meter i{background:var(--lab-line-strong);border-radius:1px;display:block;width:3px}.w3track-rank-meter i:nth-child(1){height:6px}.w3track-rank-meter i:nth-child(2){height:9px}.w3track-rank-meter i:nth-child(3){height:12px}.w3track-rank-meter i:nth-child(4){height:15px}.w3track-rank-meter i.is-on{background:var(--track-accent)}.w3track-rank-meter.is-small i:nth-child(1){height:5px}.w3track-rank-meter.is-small i:nth-child(2){height:7px}.w3track-rank-meter.is-small i:nth-child(3){height:9px}.w3track-rank-meter.is-small i:nth-child(4){height:11px}.w3tracks-hero{align-items:center;border:1px solid var(--lab-line);border-radius:calc(var(--lab-radius) * 2);background:radial-gradient(120% 140% at 88% 8%,rgba(102,228,255,0.14),transparent 60%),var(--lab-panel);display:grid;gap:clamp(16px,2.4vw,28px);grid-template-columns:minmax(0,1fr) 150px;overflow:hidden;padding:clamp(16px,2vw,24px) clamp(18px,2.4vw,28px)}.w3tracks-hero-copy h1{color:var(--lab-ink);font:900 clamp(1.7rem,3.2vw,2.3rem) / 1.05 var(--lab-display);letter-spacing:-.02em;margin:0 0 8px}.w3tracks-hero-copy p{color:var(--lab-muted);font:500 clamp(0.95rem,1.2vw,1.02rem) / 1.5 var(--lab-sans);margin:0 0 14px}.w3tracks-hero-stats{display:flex;flex-wrap:wrap;gap:8px;margin:0}.w3tracks-hero-stats div{border:1px solid var(--lab-line);border-radius:var(--lab-radius);background:var(--lab-panel-soft);padding:7px 13px}.w3tracks-hero-stats dt{color:var(--lab-dim);font:900 .58rem / 1 var(--lab-mono);letter-spacing:.16em;text-transform:uppercase}.w3tracks-hero-stats dd{color:var(--lab-ink);font:900 1.2rem / 1 var(--lab-display);margin:5px 0 0}.w3tracks-hero-art{align-items:center;display:flex;justify-content:center}.w3tracks-hero-art img{filter:drop-shadow(0 14px 32px rgba(0,0,0,0.5));height:auto;max-width:min(150px,100%);width:100%}.w3tracks-grid{display:grid;gap:clamp(12px,1.4vw,18px);grid-template-columns:minmax(0,1fr);width:100%}@media (min-width:720px){.w3tracks-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (min-width:1060px){.w3tracks-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}.w3track-card{border:1px solid var(--lab-line);border-radius:calc(var(--lab-radius) * 2);background:var(--lab-panel);display:flex;min-width:0;overflow:hidden;transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease}.w3track-card:hover,.w3track-card:focus-within{border-color:color-mix(in srgb,var(--track-accent) 62%,var(--lab-line));box-shadow:0 16px 44px rgba(0,0,0,0.46);transform:translateY(-3px)}.w3track-card-link{color:inherit;display:flex;flex:1;flex-direction:column;min-width:0;text-decoration:none}.w3track-art{align-items:center;background:radial-gradient(120% 150% at 50% 108%,color-mix(in srgb,var(--track-accent) 26%,transparent),transparent 62%),radial-gradient(circle,rgba(255,255,255,0.06) 1px,transparent 1px) 0 0 / 14px 14px,linear-gradient(180deg,rgba(5,10,16,0.72),rgba(8,16,25,0.94));border-bottom:1px solid var(--lab-line);display:flex;height:clamp(118px,10vw,138px);justify-content:center;position:relative}.w3track-art-wordmark img{background:#f0e6dc;border-radius:6px;box-shadow:0 6px 22px rgba(0,0,0,0.5);display:block;height:auto;padding:7px 13px;width:min(72%,230px)}.w3track-art-logo img{border-radius:8px;display:block;height:auto;width:min(80%,250px)}.w3track-art-seal img{border:2px solid color-mix(in srgb,var(--track-accent) 70%,transparent);border-radius:50%;box-shadow:0 6px 26px rgba(0,0,0,0.55);display:block;height:86px;object-fit:cover;width:86px}.w3track-monogram{align-items:center;border:2px solid color-mix(in srgb,var(--track-accent) 60%,transparent);border-radius:50%;color:var(--track-accent);display:flex;font:900 1.45rem / 1 var(--lab-display);height:86px;justify-content:center;letter-spacing:.04em;width:86px}.w3track-art .w3track-chip{position:absolute;right:12px;top:12px}.w3track-chip{align-items:center;background:rgba(5,10,16,0.82);border:1px solid var(--lab-line);border-radius:999px;color:var(--lab-muted);display:inline-flex;font:900 .58rem / 1 var(--lab-mono);gap:5px;letter-spacing:.12em;padding:6px 10px;text-transform:uppercase}.w3track-chip.is-lock{border-color:color-mix(in srgb,var(--lab-gold) 50%,transparent);color:var(--lab-gold)}.w3track-chip.is-done{border-color:color-mix(in srgb,var(--lab-mint) 50%,transparent);color:var(--lab-mint)}.w3track-card.is-soon{--track-accent:var(--lab-dim);--track-bright:var(--lab-muted);background:color-mix(in srgb,var(--lab-panel) 62%,#04070b);border-color:color-mix(in srgb,var(--lab-line) 70%,transparent)}.w3track-card.is-soon .w3track-card-link{cursor:default}.w3track-card.is-soon:hover,.w3track-card.is-soon:focus-within{border-color:color-mix(in srgb,var(--lab-line) 70%,transparent);box-shadow:none;transform:none}.w3track-card.is-soon .w3track-art img,.w3track-card.is-soon .w3track-monogram{filter:grayscale(1) brightness(1.45);opacity:.62}.w3track-card.is-soon .w3track-card-name{color:var(--lab-muted)}.w3track-card.is-soon .w3track-card-tagline,.w3track-card.is-soon .w3track-rank-text,.w3track-card.is-soon .w3track-origin{color:var(--lab-dim)}.w3track-chip.is-soon{border-color:color-mix(in srgb,var(--lab-gold) 55%,transparent);color:var(--lab-gold)}.w3track-card-body{display:flex;flex:1;flex-direction:column;gap:7px;padding:13px clamp(14px,1.4vw,17px)}.w3track-card-name{color:var(--lab-ink);font:900 clamp(1.1rem,1.5vw,1.28rem) / 1.15 var(--lab-display);letter-spacing:-.01em;margin:0}.w3track-card-tagline{color:var(--lab-muted);font:500 .84rem / 1.45 var(--lab-sans)}.w3track-card-meta{color:var(--lab-ink);display:flex;flex-wrap:wrap;gap:8px 16px;margin-top:2px}.w3track-meta-item{align-items:center;display:inline-flex;font:800 .82rem / 1 var(--lab-heading);gap:6px}.w3track-meta-item .w3track-ico{color:var(--track-accent)}.w3track-rank{align-items:center;display:flex;gap:9px}.w3track-rank-text{color:var(--lab-muted);font:700 .78rem / 1 var(--lab-sans)}.w3track-progress{display:block;margin-top:auto;padding-top:8px}.w3track-progress-bar{background:var(--lab-code);border-radius:999px;display:block;height:7px;overflow:hidden}.w3track-progress-bar span{background:linear-gradient(90deg,var(--track-deep),var(--track-accent));border-radius:999px;display:block;height:100%}.w3track-progress-bar.is-large{height:10px}.w3track-progress-text{color:var(--lab-muted);display:inline-block;font:800 .72rem / 1 var(--lab-mono);letter-spacing:.04em;margin-top:8px}.w3track-card-foot{align-items:center;border-top:1px solid var(--lab-line);color:var(--lab-dim);display:flex;gap:12px;justify-content:space-between;padding:9px clamp(14px,1.4vw,17px)}.w3track-origin{font:700 .7rem / 1.2 var(--lab-sans)}.w3track-card-cta{color:var(--track-accent);font:900 .72rem / 1 var(--lab-mono);letter-spacing:.1em;text-transform:uppercase;white-space:nowrap}.w3track-back a{color:var(--lab-muted);font:800 .8rem / 1 var(--lab-sans);text-decoration:none}.w3track-back a:hover{color:var(--lab-ink)}.w3track-hero{align-items:center;border:1px solid var(--lab-line);border-radius:calc(var(--lab-radius) * 2);background:radial-gradient(90% 130% at 92% 0,color-mix(in srgb,var(--track-accent) 16%,transparent),transparent 58%),var(--lab-panel);display:grid;gap:clamp(18px,3vw,40px);grid-template-columns:minmax(0,1fr) minmax(240px,0.5fr);overflow:hidden;padding:clamp(20px,3vw,40px)}.w3track-hero h1{color:var(--lab-ink);font:900 clamp(2rem,5vw,3.1rem) / 1 var(--lab-display);letter-spacing:-.02em;margin:0 0 12px}.w3track-hero-tagline{color:var(--lab-muted);font:500 clamp(1rem,1.5vw,1.12rem) / 1.6 var(--lab-sans);margin:0 0 20px;max-width:50ch}.w3track-hero-chips{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0 0 22px;padding:0}.w3track-hero-chips li{align-items:center;border:1px solid var(--lab-line);border-radius:999px;color:var(--lab-muted);display:inline-flex;font:800 .76rem / 1 var(--lab-sans);gap:7px;padding:8px 14px}.w3track-hero-chips li .w3track-ico{color:var(--track-accent)}.w3track-hero-chips li.is-lock{border-color:color-mix(in srgb,var(--lab-gold) 45%,transparent);color:var(--lab-gold)}.w3track-hero-chips li.is-lock .w3track-ico{color:inherit}.w3track-hero-progress{margin:0 0 22px;max-width:420px}.w3track-hero-actions{align-items:center;display:flex;flex-wrap:wrap;gap:14px}.w3track-hero-art{align-items:center;display:flex;flex-direction:column;gap:12px}.w3track-hero-art .w3track-art{border:1px solid var(--lab-line);border-radius:calc(var(--lab-radius) * 1.6);height:168px;width:100%}.w3track-art-caption{color:var(--lab-dim);font:700 .72rem / 1.4 var(--lab-sans);text-align:center}.w3track-cta-primary{background:linear-gradient(120deg,var(--track-accent),var(--track-bright));border-radius:var(--lab-radius);color:var(--lab-void);font:900 .95rem / 1 var(--lab-heading);padding:15px 26px;text-decoration:none;transition:transform .16s ease,box-shadow .16s ease}.w3track-cta-primary:hover{box-shadow:0 12px 30px color-mix(in srgb,var(--track-accent) 30%,transparent);transform:translateY(-2px)}.w3track-cta-secondary{border:1px solid var(--lab-line-strong);border-radius:var(--lab-radius);color:var(--lab-ink);font:800 .9rem / 1 var(--lab-heading);padding:14px 22px;text-decoration:none;transition:border-color .16s ease}.w3track-cta-secondary:hover{border-color:var(--track-accent)}.w3track-cta-note{color:var(--lab-dim);flex:1 1 260px;font:500 .82rem / 1.5 var(--lab-sans);min-width:240px}.w3track-levels{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}.w3track-level{border:1px solid var(--lab-line);border-radius:calc(var(--lab-radius) * 1.5);background:radial-gradient(120% 120% at 100% 0,color-mix(in srgb,var(--track-accent) 9%,transparent),transparent 58%),var(--lab-panel);transition:border-color .16s ease,transform .16s ease}.w3track-level:hover{border-color:color-mix(in srgb,var(--track-accent) 55%,var(--lab-line));transform:translateY(-2px)}.w3track-level.is-locked,.w3track-level.is-gated{opacity:.6}.w3track-level-link{color:inherit;display:flex;flex-direction:column;gap:8px;height:100%;padding:14px 15px 13px;text-decoration:none}.w3track-level-head{align-items:center;display:flex;gap:8px}.w3track-level-head .w3lab-level-glyph{color:var(--track-accent);font-size:1.05rem}.w3track-level.is-locked .w3track-level-head .w3lab-level-glyph,.w3track-level.is-gated .w3track-level-head .w3lab-level-glyph{color:var(--lab-dim)}.w3track-level-index{color:var(--lab-dim);flex:none;font:900 .92rem / 1.25 var(--lab-mono);letter-spacing:.02em}.w3track-level .w3track-ico.is-mark{align-self:center;font-size:1rem;margin-left:auto}.w3track-level.is-solved .w3track-level-index{color:var(--track-accent)}.w3track-level.is-solved .w3track-ico.is-mark{color:var(--lab-mint)}.w3track-level.is-locked .w3track-ico.is-mark,.w3track-level.is-gated .w3track-ico.is-mark{color:var(--lab-dim)}.w3track-level-title{color:var(--lab-ink);font:800 1rem / 1.25 var(--lab-heading)}.w3track-level-facts{align-items:center;display:flex;gap:8px}.w3track-level-diff{color:var(--lab-muted);font:700 .74rem / 1 var(--lab-sans)}.w3track-level-foot{color:var(--lab-dim);display:flex;flex-wrap:wrap;font:800 .68rem / 1.3 var(--lab-mono);gap:4px 10px;margin-top:auto;padding-top:4px}.w3track-level.is-bonus{--track-accent:var(--lab-violet);border-color:color-mix(in srgb,var(--lab-violet) 45%,transparent);background:radial-gradient(130% 130% at 100% 0,color-mix(in srgb,var(--lab-violet) 22%,transparent),transparent 62%),var(--lab-panel)}.w3track-level.is-bonus:hover{border-color:color-mix(in srgb,var(--lab-violet) 78%,transparent);box-shadow:0 10px 30px color-mix(in srgb,var(--lab-violet) 20%,transparent)}.w3track-level.is-bonus .w3track-level-index{color:var(--lab-violet)}.w3track-level-bonus{background:color-mix(in srgb,var(--lab-violet) 22%,transparent);border:1px solid color-mix(in srgb,var(--lab-violet) 55%,transparent);border-radius:999px;color:var(--lab-violet-bright);letter-spacing:.1em;padding:4px 9px;text-transform:uppercase}.w3track-level-status{align-self:flex-start;border:1px solid var(--lab-line);border-radius:999px;color:var(--lab-dim);font:900 .54rem / 1 var(--lab-mono);letter-spacing:.1em;padding:5px 9px;text-transform:uppercase}.w3track-level-status.is-solved{border-color:color-mix(in srgb,var(--lab-mint) 50%,transparent);color:var(--lab-mint)}.w3track-level-status.is-students-only{border-color:color-mix(in srgb,var(--lab-gold) 45%,transparent);color:var(--lab-gold)}@media (max-width:900px){.w3tracks-hero,.w3track-hero{grid-template-columns:minmax(0,1fr)}.w3tracks-hero-art{display:none}.w3track-hero-art .w3track-art{height:132px}.w3track-card{max-width:none}}@media (max-width:560px){.w3track-levels{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}.w3track-art{height:126px}}