:root {
  --bg: #f6f6fb;
  --ink: #1c1b3a;
  --mute: #5b5b7e;
  --line: #d9d9ea;
  --link: #3c4fd8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131327;
    --ink: #ececfa;
    --mute: #a3a3c6;
    --line: #2f2f55;
    --link: #9aa8ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, 'Segoe UI', sans-serif;
}
main {
  max-width: 680px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 6px; }
h2 { font-size: 20px; margin: 32px 0 6px; }
p, li { margin: 0 0 12px; }
a { color: var(--link); }
.meta { color: var(--mute); margin-bottom: 28px; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--mute); font-size: 15px; }