:root {
  --bg: #f7f6f2; --ink: #15171c; --muted: #5d6270; --line: #e2e0d8;
  --accent: #0064fa; --accent-ink: #ffffff;
  --sans: "Instrument Sans", -apple-system, "Segoe UI", sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111317; --ink: #eceae4; --muted: #9a9fab; --line: #2a2e36;
    --accent: #4d8dff; --accent-ink: #0b1220; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #111317; --ink: #eceae4; --muted: #9a9fab; --line: #2a2e36;
  --accent: #4d8dff; --accent-ink: #0b1220; color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.7 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 24px; }
header { border-bottom: 1px solid var(--line); }
header .wrap { max-width: 1080px; display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -0.01em; text-decoration: none; color: var(--ink); }
.brand svg { width: 24px; height: 24px; }
header nav a { font-size: 15px; color: var(--muted); text-decoration: none; }
main { padding: 64px 0 96px; }
h1 { font-size: clamp(32px, 5vw, 44px); line-height: 1.1; letter-spacing: -0.03em; font-weight: 600; margin: 0 0 8px; }
.updated { color: var(--muted); margin: 0 0 40px; font-size: 15px; }
h2 { font-size: 20px; letter-spacing: -0.01em; font-weight: 600; margin: 40px 0 8px; }
p, li { color: var(--ink); }
ul { padding-left: 20px; }
li { margin: 6px 0; }
footer { border-top: 1px solid var(--line); padding: 32px 0 48px; font-size: 14px; color: var(--muted); }
footer .wrap { max-width: 1080px; display: flex; gap: 24px; flex-wrap: wrap; }
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--ink); }
@media (max-width: 480px) { .wrap { padding: 0 16px; } main { padding: 40px 0 64px; } }