:root{
  --bg:#0b0f17;
  --card:#111827;
  --ink:#e5e7eb;
  --accent:#22d3ee;
  --muted:#9ca3af;
  --ok:#34d399;
  --warn:#f59e0b;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:radial-gradient(1200px 600px at 80% -10%, rgba(34,211,238,0.25), transparent 40%), var(--bg);color:var(--ink);font:16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji","Segoe UI Emoji";}
a{color:var(--accent);text-decoration:none} a:hover{text-decoration:underline}
.container{max-width:1000px;margin:0 auto;padding:32px}
.header{display:flex;align-items:center;gap:16px;margin:24px 0 8px}
.logo{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg, var(--accent), #60a5fa);display:grid;place-items:center;font-weight:800;color:#001018;box-shadow:0 10px 30px rgba(34,211,238,.25)}
.title{font-size:32px;font-weight:800;letter-spacing:.3px}
.subtitle{color:var(--muted);margin-top:-6px}
.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:18px;margin-top:28px}
.card{grid-column:span 12;background:linear-gradient(180deg, rgba(255,255,255,0.02), transparent), var(--card);border:1px solid rgba(255,255,255,0.06);border-radius:18px;padding:20px;box-shadow:0 10px 30px rgba(0,0,0,.25)}
@media(min-width:860px){
  .card.half{grid-column:span 6}
}
.card h2{margin:0 0 8px;font-size:20px}
.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border-radius:999px;background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.45);color:var(--accent);font-weight:600;margin:8px 0 16px}
.step{display:grid;grid-template-columns:64px 1fr;gap:16px;align-items:start;margin:14px 0;padding:10px;border-left:3px solid rgba(255,255,255,0.06)}
.step svg{width:64px;height:64px}
.note{font-size:14px;color:var(--muted)}
.figure{display:flex;flex-direction:column;gap:8px;align-items:center;margin:8px 0 4px}
.figure img{width:100%;max-width:520px;border-radius:12px;border:1px solid rgba(255,255,255,.07)}
.kbd{font:600 12px/1 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono"; background:#0b1220; padding:2px 6px; border-radius:6px; border:1px solid rgba(255,255,255,.08)}
.footer{margin:30px 0 10px;text-align:center;color:var(--muted);font-size:14px}
hr{border:none;height:1px;background:linear-gradient(90deg, transparent, rgba(255,255,255,.14), transparent);margin:16px 0}
ol{padding-left:20px}
.code{background:#0b1220;border:1px solid rgba(255,255,255,.08);padding:12px;border-radius:12px;overflow:auto}