:root{--bg:#0b0f14;--card:#0b1220;--text:#e5edf7;--muted:#94a3b8;--accent:#60a5fa;--border:#1f2937}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.55 system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}
.wrap{max-width:1100px;margin:0 auto;padding:40px 24px}
h1{margin:0 0 8px;font-size:34px}
p.lead{color:var(--muted);margin:0 0 22px}
.card{background:var(--card);border:1px solid var(--border);padding:18px;border-radius:14px}
.badge{display:inline-block;margin-bottom:8px;padding:4px 8px;border:1px solid var(--border);border-radius:999px;color:var(--muted);font-size:12px}
.row{display:flex;gap:12px;flex-wrap:wrap;margin:10px 0}
.btn{display:inline-block;padding:12px 16px;border-radius:12px;border:1px solid var(--border);background:#111827;color:#fff;text-decoration:none}
.btn:hover{filter:brightness(1.1)}
small{color:var(--muted)}
/* demo layout */
.demo{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.demo .pane{position:relative;display:flex;flex-direction:column;height:68vh;min-height:520px}
.demo .pane h3{margin:0 0 8px;font-size:16px;color:#cbd5e1}
.demo .pane iframe{flex:1;border:1px solid var(--border);border-radius:10px;background:#000}
.demo .note{font-size:13px;color:var(--muted);margin-top:8px}
.kbd{font-family:ui-monospace,Consolas,monospace;border:1px solid var(--border);border-radius:6px;padding:2px 6px;background:#0b1322}
.footer{margin-top:26px;color:var(--muted);font-size:14px}