:root{font-family:system-ui,-apple-system,Segoe UI,sans-serif;color:#dce7f7;background:#081422;line-height:1.6}*{box-sizing:border-box}body{margin:0}a{color:#77e0d1}header{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:22px 5%;border-bottom:1px solid #2a3b50;flex-wrap:wrap}header>a:first-child{font-size:24px;letter-spacing:2px;font-weight:900;text-decoration:none;color:#fff}header>a>span{color:#57dec4}header>span{font-size:12px;letter-spacing:2px}main{max-width:1400px;margin:auto;padding:30px}.hero{display:grid;grid-template-columns:1fr 210px;gap:40px;align-items:center;margin:18px 0 40px}h1{font-size:clamp(32px,4vw,55px);line-height:1.12;letter-spacing:-2px;margin:10px 0 22px;color:#fff}h2{font-size:23px;line-height:1.3}h3{font-size:18px}.eyebrow{font-size:12px;font-weight:800;letter-spacing:2px;color:#74e8d5}.scope,.legend,small{font-size:13px;color:#adbed0}.score{display:flex;flex-direction:column;gap:12px;background:#12333a;border:1px solid #276257;padding:25px;border-radius:20px}.score strong{font-size:45px;color:#8ff5de}progress{width:100%;accent-color:#64e9cd}.layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(280px,1fr);gap:24px}.panel,.terminal{padding:24px;border:1px solid #2b3e54;border-radius:18px;background:#112235;margin-bottom:24px;min-width:0}aside{align-self:start}.section-head{display:flex;align-items:center;justify-content:space-between;gap:15px;flex-wrap:wrap}.section-head h2{margin:0}.section-head span{font-size:12px;color:#8ff5de}svg{width:100%;margin-top:20px}svg path{stroke:#627187;stroke-width:3;fill:none;stroke-dasharray:7}svg path.up{stroke:#6ce5bc;stroke-dasharray:none}svg rect{fill:#1c4c61;stroke:#72dcd0;stroke-width:2;rx:10}svg text{font-size:13px;fill:#dce7f7}svg g text{font-size:22px;font-weight:bold}label{display:block;font-size:14px}select,input,button{font:inherit;border-radius:8px;border:1px solid #47627c;padding:10px;color:#e8f0fc;background:#091725}select{max-width:100%}button{cursor:pointer;background:#7ce4ce;color:#082c2b;font-weight:750;border-color:transparent}button:hover{filter:brightness(1.12)}button:disabled{opacity:.4;cursor:default}button.secondary{background:#253e56;color:#fff}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #f4bd6a;outline-offset:3px}.terminal{background:#060f1a}pre{font-family:Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere;font-size:13px;line-height:1.65}#output{height:310px;overflow:auto;background:#050c14;padding:15px;color:#aff5d7}#cli{display:flex;gap:8px;align-items:center;flex-wrap:wrap}#cli label{font:14px Consolas,monospace;color:#7ce4ce}#command{flex:1;min-width:130px}.terminal p{font-size:12px;color:#adbed0}details{margin:20px 0}summary{cursor:pointer;color:#81e9d5;font-weight:650}#solution{padding:16px;background:#06131f;border-radius:10px}.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.check{padding:8px 0;border-bottom:1px solid #273a50;font-size:14px}.check.ok{color:#9df0d6}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;font-size:13px}td,th{text-align:left;padding:8px;border-bottom:1px solid #34475f;white-space:nowrap}footer{border-top:1px solid #34475f;padding:28px 0;font-size:14px;color:#b8c9da}hr{border:0;border-top:1px solid #34475f;margin:30px 0}code{color:#9df0d6}#feedback{color:#f6d799}@media(max-width:800px){main{padding:18px}.hero{grid-template-columns:1fr;gap:15px}.score{flex-direction:row;flex-wrap:wrap;align-items:center;padding:18px}.score strong{font-size:32px}.layout{grid-template-columns:1fr}.panel,.terminal{padding:17px}.hero{margin-top:0}header{padding:18px}header>span{display:none}}