:root{--bg:#090b12;--panel:#141925;--panel2:#1b2231;--line:#2a354b;--text:#f7f9fc;--muted:#98a4b8;--accent:#7c5cff;--accent2:#2dd4bf;--ok:#34c77b;--warn:#f4b942}*{box-sizing:border-box}body{margin:0;min-width:320px;background:radial-gradient(circle at 0 0,rgba(124,92,255,.18),transparent 34rem),radial-gradient(circle at 100% 0,rgba(45,212,191,.11),transparent 30rem),var(--bg);color:var(--text);font-family:Inter,system-ui,sans-serif}button,input{font:inherit}button{cursor:pointer}.wrap{width:min(1200px,calc(100% - 24px));margin:auto}header{position:sticky;top:0;z-index:20;background:#090b12d6;backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.top{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{font-weight:900;display:flex;align-items:center;gap:11px}.logo{width:38px;height:38px;display:grid;place-items:center;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent2))}.muted{color:var(--muted)}main{padding:42px 0 60px}h1{margin:0 0 12px;font-size:clamp(2.5rem,7vw,5.2rem);line-height:.95;letter-spacing:-.06em}.gradient{background:linear-gradient(90deg,#c9beff,#76efe4);background-clip:text;color:transparent}.hero p{max-width:760px;color:var(--muted);line-height:1.65}.layout{display:grid;grid-template-columns:300px minmax(0,1fr);gap:20px;align-items:start}.card{background:#141925e6;border:1px solid var(--line);border-radius:20px}aside{position:sticky;top:88px;padding:14px;max-height:calc(100vh - 108px);overflow:auto}.category h3{margin:10px 8px 7px;color:var(--muted);font-size:.72rem;text-transform:uppercase;letter-spacing:.1em}.algo-btn{width:100%;text-align:left;border:1px solid transparent;background:transparent;color:var(--text);padding:10px 11px;border-radius:12px;margin:2px 0}.algo-btn strong{display:block}.algo-btn small{color:var(--muted)}.algo-btn.active{background:#7c5cff26;border-color:#7c5cff8c}.workspace{overflow:hidden}.head{padding:20px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:15px}.head h2{margin:4px 0 6px;font-size:clamp(1.5rem,4vw,2.2rem)}.head p{margin:0;color:var(--muted)}.badge{align-self:flex-start;border:1px solid rgba(45,212,191,.35);background:#2dd4bf1a;color:#9af5eb;border-radius:999px;padding:8px 11px;font-size:.78rem;font-weight:800}.controls{padding:14px 18px;border-bottom:1px solid var(--line);display:flex;flex-wrap:wrap;gap:9px;align-items:center}.btn{min-height:42px;border:1px solid var(--line);background:var(--panel2);color:var(--text);border-radius:11px;padding:0 14px;font-weight:750}.btn.primary{border:0;background:linear-gradient(135deg,var(--accent),#5a48e4)}.controls label{margin-left:auto;color:var(--muted);display:flex;align-items:center;gap:8px;font-size:.82rem}.stage{padding:20px;min-height:430px;display:flex;flex-direction:column}#visual{flex:1;min-height:320px;display:flex;align-items:center;justify-content:center}.bars{height:300px;width:100%;display:flex;align-items:flex-end;gap:clamp(3px,.8vw,10px);border-bottom:1px solid var(--line)}.bar{flex:1 1 0;min-width:4px;border-radius:7px 7px 2px 2px;background:linear-gradient(180deg,var(--accent),#4f3fca);transition:.2s;position:relative}.bar.active{background:linear-gradient(180deg,var(--warn),#db8e18);transform:translateY(-6px)}.bar.done{background:linear-gradient(180deg,var(--ok),#1d9959)}.bar.faded{opacity:.22}.bar:after{content:attr(data-value);position:absolute;bottom:calc(100% + 5px);left:50%;transform:translate(-50%);font-size:.65rem;color:var(--muted)}.nodes{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;width:100%}.node{min-width:62px;min-height:62px;display:grid;place-items:center;border:2px solid var(--line);border-radius:16px;background:var(--panel2);font-weight:900;transition:.2s}.node.active{border-color:var(--warn);transform:scale(1.08)}.node.done{border-color:var(--ok);background:#34c77b1f}.matrix{display:grid;grid-template-columns:repeat(7,minmax(30px,52px));gap:5px}.cell{aspect-ratio:1;display:grid;place-items:center;border:1px solid var(--line);border-radius:8px;background:var(--panel2);font-size:.78rem}.cell.active{border-color:var(--warn);background:#f4b94221}.cell.done{border-color:var(--ok);background:#34c77b1f}.status{padding-top:16px;border-top:1px solid var(--line);color:var(--muted);min-height:54px}.codegrid{border-top:1px solid var(--line);padding:18px;display:grid;grid-template-columns:1fr 1fr;gap:16px}pre{margin:0;min-height:210px;white-space:pre-wrap;overflow:auto;background:#090d16;border:1px solid var(--line);border-radius:14px;padding:16px;color:#dce7ff;line-height:1.55}ol{margin:0;padding:0;list-style:none;display:grid;gap:8px}ol li{padding:10px 12px;border:1px solid var(--line);border-radius:11px;color:var(--muted)}ol li.active{color:var(--text);border-color:#7c5cff99;background:#7c5cff1a}footer{text-align:center;color:var(--muted);padding-top:28px;font-size:.82rem}@media(max-width:900px){.layout{grid-template-columns:1fr}aside{position:static;max-height:none}.category-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.wrap{width:min(100% - 16px,1200px)}.category-list{grid-template-columns:1fr}.head{flex-direction:column}.controls label{width:100%;margin-left:0}.controls input{flex:1}.stage{padding:12px;min-height:390px}#visual{min-height:280px}.bars{height:250px;gap:3px}.codegrid{grid-template-columns:1fr}.matrix{width:100%;grid-template-columns:repeat(7,minmax(26px,1fr))}}@media(max-width:600px){.bar:after{display:block;font-size:.56rem;bottom:calc(100% + 3px)}.bars{padding-top:18px}}