:root{color-scheme:dark;--bg:#0c1112;--card:#151d1f;--line:#2b3b3e;--text:#eef5f3;--muted:#b4c6c3;--accent:#a5edb2}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:17px/1.65 system-ui,sans-serif}a{color:var(--accent);text-underline-offset:4px}header,main,footer{max-width:1120px;margin:auto;padding:26px}header{display:flex;justify-content:space-between;gap:20px;align-items:center;border-bottom:1px solid var(--line)}nav{display:flex;flex-wrap:wrap;gap:20px}.brand{font-size:23px;font-weight:750;text-decoration:none;color:var(--text)}.eyebrow{font-size:13px;letter-spacing:.13em;text-transform:uppercase;color:var(--accent)}h1{font-size:clamp(36px,5vw,66px);line-height:1.1;letter-spacing:-.04em;max-width:820px;margin:20px 0}h2{font-size:25px;line-height:1.3}p{max-width:760px}.lead{font-size:21px;color:var(--muted)}.hero{padding:42px 0 28px}.badge{display:inline-block;padding:6px 12px;border:1px solid var(--line);border-radius:20px;color:var(--muted);font-size:14px}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.card,form{padding:26px;background:var(--card);border:1px solid var(--line);border-radius:16px;margin:18px 0}.card h2{margin-top:0}.button,button{display:inline-block;border:0;border-radius:9px;background:var(--accent);color:#102516;padding:12px 20px;font:600 16px system-ui;text-decoration:none;cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}.secondary{background:transparent;border:1px solid var(--line);color:var(--text)}.actions{display:flex;flex-wrap:wrap;gap:14px;margin:25px 0}small,.muted,figcaption{color:var(--muted)}img{max-width:100%;height:auto;border-radius:12px}figure{margin:24px 0}figcaption{font-size:14px}footer{display:flex;flex-wrap:wrap;gap:22px;border-top:1px solid var(--line);font-size:14px;margin-top:35px}label{display:block;margin:16px 0 6px}input,select,textarea{width:100%;padding:12px;background:#0d1415;color:var(--text);border:1px solid #546766;border-radius:7px;font:inherit}textarea{resize:vertical;min-height:180px}.check{display:flex;gap:12px;align-items:flex-start}.check input{width:20px;height:20px;flex-shrink:0}.trap{position:absolute;left:-10000px}.form-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(220px,1fr);gap:28px}.form-layout aside{padding-top:20px}.language{width:auto;max-width:160px}#status{min-height:56px;overflow-wrap:anywhere}#challenge{margin:20px 0}code{overflow-wrap:anywhere;font-size:13px}.notice{border-left:3px solid var(--accent);padding:12px 18px;background:var(--card)}:focus-visible{outline:3px solid var(--accent);outline-offset:4px}@media(max-width:700px){header{align-items:flex-start;flex-direction:column}.grid,.form-layout{grid-template-columns:1fr}main,header,footer{padding:20px}form{padding:18px}h1{font-size:38px}.hero{padding-top:24px}nav{gap:14px}}