:root {
  --bg: #fafaf7;
  --fg: #1d1d1b;
  --muted: #5f5f5a;
  --accent: #1f6f5c;
  --line: #e4e3dc;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141413;
    --fg: #ecebe6;
    --muted: #a3a29b;
    --accent: #5cc3a6;
    --line: #2c2c29;
    --card: #1c1c1a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { border-bottom: 1px solid var(--line); }
header .wrap { display: flex; justify-content: space-between; align-items: center; min-height: 64px; gap: 16px; flex-wrap: wrap; }
.logo { font-weight: 700; color: var(--fg); text-decoration: none; letter-spacing: -0.01em; }
.logo span { color: var(--accent); }
nav a { color: var(--muted); text-decoration: none; margin-left: 16px; font-size: 15px; }
nav a:hover { color: var(--fg); }
main { padding: 48px 0 64px; }
h1 { font-size: 2.1rem; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 16px; }
h2 { font-size: 1.25rem; margin: 36px 0 8px; }
p, li { color: var(--fg); }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 60ch; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-top: 32px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
a { color: var(--accent); }
.updated { color: var(--muted); font-size: 14px; }
footer { border-top: 1px solid var(--line); padding: 24px 0; color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); margin-right: 16px; }