:root { --bg: #f7f7f5; --fg: #1d1d1b; --muted: #6b6b66; --accent: #2457c5; --card: #fff; --border: #e2e2dd; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #161615; --fg: #ececea; --muted: #9a9a94; --accent: #7aa2ff; --card: #1f1f1e; --border: #333331; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.5 system-ui, -apple-system, Segoe UI, sans-serif; background: var(--bg); color: var(--fg); }
header { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--border); }
header h1 { font-size: 1.1rem; margin: 0; }
main { max-width: 960px; margin: 0 auto; padding: 24px 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 20px; }
.muted { color: var(--muted); }
button, .button { font: inherit; padding: 6px 14px; border-radius: 6px; border: 1px solid var(--border); background: var(--card); color: var(--fg); cursor: pointer; text-decoration: none; }
button:hover, .button:hover { border-color: var(--accent); }