:root {
  --bg: #ffffff;
  --text: #1c1c22;
  --muted: #5d5d6b;
  --accent: #1a4fa8;
  --rule: #e4e4ea;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111118;
    --text: #ececf2;
    --muted: #a3a3b3;
    --accent: #7fa6ef;
    --rule: #2a2a35;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 32px 16px 64px; }
nav { font-size: 15px; color: var(--muted); margin-bottom: 24px; }
a { color: var(--accent); }
nav a[aria-current="page"] { color: var(--text); text-decoration: none; font-weight: 600; }
h1 { font-size: 28px; line-height: 1.25; margin: 0 0 4px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
.meta { color: var(--muted); font-size: 15px; margin-top: 0; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 48px 0; }
dt { font-weight: 600; margin-top: 16px; }
dd { margin: 4px 0 0; }
.button {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
}