:root {
  --bg: #fafaf9;
  --fg: #1c1917;
  --muted: #57534e;
  --line: #e7e5e4;
  --accent: #059669;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1917;
    --fg: #f5f5f4;
    --muted: #a8a29e;
    --line: #44403c;
    --accent: #34d399;
    --card: #292524;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 48px 16px 64px; }
header.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 32px; }
header.brand a { color: inherit; text-decoration: none; font-weight: 650; font-size: 1.15rem; }
.mark { width: 32px; height: 32px; flex: none; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 12px; letter-spacing: -0.01em; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; }
p, li { color: var(--fg); }
.lede { font-size: 1.15rem; color: var(--muted); margin: 0 0 32px; }
.muted { color: var(--muted); }
a { color: var(--accent); }
ul { padding-left: 1.2rem; }
.cards { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); margin: 24px 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; }
.card strong { display: block; margin-bottom: 4px; }
.card span { color: var(--muted); font-size: 0.95rem; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }
footer a { color: var(--muted); }