:root {
  --bg: #ffffff;
  --ink: #111111;
  --soft: #6b6b6b;
  --line: #e4e4e4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0b;
    --ink: #f2f2f2;
    --soft: #9a9a9a;
    --line: #262626;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 40px 16px 80px; }
h1 { font-size: 30px; line-height: 1.2; margin: 8px 0 4px; letter-spacing: -0.02em; }
h2 { font-size: 18px; margin: 32px 0 8px; padding-top: 20px; border-top: 1px solid var(--line); }
.meta { color: var(--soft); font-size: 14px; margin: 0 0 24px; }
.back { margin: 0; font-size: 14px; font-weight: 600; }
a { color: var(--ink); text-underline-offset: 3px; }
ul, ol { padding-left: 22px; }
li { margin: 4px 0; }
.links { list-style: none; padding: 0; }
.links li { border-top: 1px solid var(--line); padding: 14px 0; }
.links a { text-decoration: none; font-weight: 600; }