:root {
  --bg: #fafaf7;
  --fg: #1d1d1b;
  --muted: #5d5d58;
  --accent: #2f5bd3;
  --card: #ffffff;
  --border: #e4e4de;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131312;
    --fg: #ececE8;
    --muted: #a3a39c;
    --accent: #7fa2ff;
    --card: #1c1c1a;
    --border: #2d2d2a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { border-bottom: 1px solid var(--border); }
header .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.brand { font-weight: 700; color: var(--fg); text-decoration: none; letter-spacing: -0.01em; }
nav a { color: var(--muted); text-decoration: none; margin-left: 18px; font-size: 15px; }
nav a:hover { color: var(--fg); }
main { padding: 48px 0 64px; }
h1 { font-size: clamp(28px, 5vw, 40px); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 16px; }
h2 { font-size: 20px; margin: 36px 0 8px; }
p, li { color: var(--fg); }
.lede { font-size: 18px; color: var(--muted); max-width: 60ch; }
a { color: var(--accent); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin: 28px 0; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.card strong { display: block; margin-bottom: 4px; }
.card span { color: var(--muted); font-size: 15px; }
.meta { color: var(--muted); font-size: 14px; }
code { background: var(--card); border: 1px solid var(--border); border-radius: 4px; padding: 1px 5px; font-size: 0.9em; }
footer { border-top: 1px solid var(--border); padding: 24px 0; color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); margin-right: 16px; }