:root {
  color-scheme: light dark;
  --fg: #1a1a1a;
  --muted: #555;
  --bg: #f7f5f2;
  --card: #fff;
  --link: #0b5fff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #f2f2f2;
    --muted: #aaa;
    --bg: #121212;
    --card: #1c1c1c;
    --link: #8ab4ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.65;
  background: var(--bg);
  color: var(--fg);
}
main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
  background: var(--card);
  min-height: 100vh;
}
h1 { font-size: 1.45rem; margin: 0 0 0.5rem; }
h2 { font-size: 1.1rem; margin: 1.6rem 0 0.5rem; }
.meta, .disclaimer, .nav { color: var(--muted); font-size: 0.92rem; }
.nav { margin: 0 0 1.25rem; }
a { color: var(--link); }
ul { padding-left: 1.2rem; }
.links { list-style: none; padding: 0; }
.links li { margin: 0.75rem 0; }