:root {
  --bg: #fbfaf7;
  --fg: #1c1b19;
  --muted: #5f5c55;
  --line: #e4e1da;
  --accent: #2f5d50;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141412;
    --fg: #ecebe6;
    --muted: #a3a097;
    --line: #2c2b27;
    --accent: #8cc4b0;
    --card: #1b1b18;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { border-bottom: 1px solid var(--line); }
header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-weight: 700; letter-spacing: -0.01em; color: var(--fg); text-decoration: none; }
nav a { color: var(--muted); text-decoration: none; margin-left: 20px; font-size: 15px; }
nav a:hover, a { color: var(--accent); }
main { padding: 56px 0 72px; }
h1 { font-size: 40px; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 16px; }
h2 { font-size: 22px; margin: 48px 0 12px; }
h3 { font-size: 17px; margin: 24px 0 6px; }
.lede { font-size: 20px; color: var(--muted); margin: 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 20px; }
.card h3 { margin-top: 0; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.tag { display: inline-block; font-size: 12px; color: var(--accent); border: 1px solid var(--line); border-radius: 999px; padding: 1px 10px; margin-bottom: 8px; }
.updated { color: var(--muted); font-size: 14px; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer .wrap { padding: 24px 20px; display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; }
footer a { color: var(--muted); }
@media (max-width: 520px) {
  h1 { font-size: 32px; }
  nav a { margin-left: 14px; }
}