:root{--bg:#0b1220;--card:#121b2f;--text:#e9eefc;--muted:#a9b4d0;--accent:#5b8cff}*{box-sizing:border-box}body{margin:0;font-family:system-ui,Arial;background:linear-gradient(180deg,#071022,#0b1220);color:var(--text)}a{color:inherit;text-decoration:none}.container{max-width:1050px;margin:0 auto;padding:24px}.topbar{display:flex;justify-content:space-between;align-items:center;padding:14px 24px;border-bottom:1px solid rgba(255,255,255,.08);position:sticky;top:0;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#071022a6}.brand{font-weight:700;letter-spacing:.2px}.nav a{margin-left:14px;padding:8px 10px;border-radius:8px}.nav a.active{background:#5b8cff2e;outline:1px solid rgba(91,140,255,.35)}.hero{padding:26px;border-radius:16px;background:radial-gradient(1200px 500px at 20% 10%,rgba(91,140,255,.25),transparent),var(--card);border:1px solid rgba(255,255,255,.08)}.hero h1{margin-top:0}.heroActions{display:flex;gap:10px;align-items:center;margin-top:12px}.grid{display:grid;gap:14px;grid-template-columns:repeat(2,minmax(0,1fr));margin:18px 0}@media (max-width: 780px){.grid{grid-template-columns:1fr}}.card{background:var(--card);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:16px}.demo{margin-top:18px;padding:16px;border-radius:14px;border:1px solid rgba(255,255,255,.08);background:#121b2fb3}.btn{background:var(--accent);border:none;color:#fff;padding:10px 14px;border-radius:10px;cursor:pointer;font-weight:600}.btn:disabled{opacity:.7;cursor:not-allowed}.pill{padding:6px 10px;border-radius:999px;background:#5b8cff2e;border:1px solid rgba(91,140,255,.35);font-size:12px}.textarea,input,textarea{width:100%;padding:10px;border-radius:10px;border:1px solid rgba(255,255,255,.12);background:#080c1699;color:var(--text);outline:none}.row{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}.muted{color:var(--muted)}.output{margin-top:12px;padding:12px;border-radius:12px;background:#060b14;border:1px solid rgba(255,255,255,.1);overflow:auto}.ok{color:#7dffb0;margin-top:10px}.err{color:#ff8b8b;margin-top:10px}.footer{text-align:center;padding:20px;color:var(--muted);border-top:1px solid rgba(255,255,255,.08)}.list{margin:0;padding-left:18px;color:var(--muted)}