:root {
  --bg: #f6f6f3; --surface: #ffffff; --fg: #1d201f; --muted: #6a706d;
  --border: #e3e3de; --accent: #0f766e; --accent-soft: #e5f2f0;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141716; --surface: #1d2120; --fg: #e9eeec; --muted: #97a19d;
    --border: #2d3331; --accent: #2dd4bf; --accent-soft: #15302c;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 16px 64px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
header img { width: 40px; height: 40px; }
h1 { font-size: 28px; line-height: 1.2; margin: 0; }
.updated { color: var(--muted); margin: 0 0 32px; font-size: 14px; }
h2 { font-size: 19px; margin: 36px 0 8px; }
p, li { margin: 0 0 12px; }
ul { padding-left: 22px; margin: 0 0 12px; }
.summary {
  background: var(--accent-soft); border-radius: 10px; padding: 16px 20px; margin-bottom: 8px;
}
.summary ul { margin: 0; }
.summary li:last-child, .summary p:last-child { margin-bottom: 0; }
a { color: var(--accent); }
code { font-size: 14px; background: var(--surface); border: 1px solid var(--border); border-radius: 4px; padding: 1px 5px; }