:root {
  --bg: #ffffff;
  --fg: #0a0a0a;
  --muted: #6b7280;
  --card: #f8fafc;
  --line: rgba(0,0,0,.08);
  --accent: #111827;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root { --bg:#0b0b0c; --fg:#f5f5f6; --muted:#9aa1aa; --card:#121316; --line:rgba(255,255,255,.08); --accent:#e5e7eb; }
}
html,body { height:100%; }
body {
  margin:0; font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg); color: var(--fg); -webkit-font-smoothing: antialiased; line-height: 1.5;
}
.wrap { max-width: 960px; margin: 0 auto; padding: 24px; }
header { display:flex; align-items:center; justify-content:space-between; gap:16px; padding:8px 0; }
.brand { display:flex; align-items:center; gap:10px; font-weight:700; letter-spacing:.2px; }
.dot { width:10px; height:10px; border-radius:50%; background: var(--fg); opacity:.9; }
nav a { color: var(--muted); text-decoration:none; margin-left:18px; font-size:.95rem; }
nav a:hover { color: var(--fg); }

.hero { padding: 72px 0 48px; }
h1 { font-size: clamp(32px, 6vw, 56px); line-height:1.05; letter-spacing:-.02em; margin: 0 0 16px; }
.sub { color: var(--muted); max-width: 720px; font-size: clamp(16px, 2.2vw, 18px); }

.cta { display:flex; gap:12px; margin-top:28px; flex-wrap:wrap; }
.btn { border:1px solid var(--line); background: var(--fg); color: var(--bg); padding:12px 18px; border-radius:10px; text-decoration:none; font-weight:600; }
.btn.secondary { background: transparent; color: var(--fg); }
.btn:hover { transform: translateY(-1px); }

.section { padding: 40px 0; border-top:1px solid var(--line); }
.grid { display:grid; grid-template-columns: repeat(12, 1fr); gap:14px; }
.card { grid-column: span 12; background: var(--card); border:1px solid var(--line); border-radius: var(--radius); padding:18px; }
.card h3 { margin:6px 0 6px; font-size: 1.05rem; }
.card p { margin:0; color: var(--muted); }
@media(min-width:720px){ .card { grid-column: span 4; } }

.mini { display:flex; gap:10px; align-items:flex-start; }
.mini .badge { font-size:.75rem; padding:4px 8px; border-radius:999px; border:1px solid var(--line); color: var(--muted); }

details { border:1px solid var(--line); border-radius: var(--radius); padding:14px 16px; background: var(--card); }
details + details { margin-top:10px; }
summary { cursor:pointer; font-weight:600; }

footer { padding: 40px 0 24px; color: var(--muted); font-size:.95rem; display:flex; justify-content:space-between; align-items:center; gap:16px; }
footer a { color: inherit; text-decoration: none; }