:root {
  color-scheme: light dark;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
  line-height: 1.8;
  color: #1a1a1a;
  background: #fff;
}
@media (prefers-color-scheme: dark) {
  body { color: #e6e6e6; background: #121212; }
  a { color: #7ab8ff; }
  table, th, td { border-color: #444 !important; }
  .notice { background: #2a2410 !important; border-color: #6b5a1a !important; }
}
h1 { font-size: 1.5rem; border-bottom: 2px solid #ddd; padding-bottom: 0.5rem; }
h2 { font-size: 1.15rem; margin-top: 2rem; }
table { border-collapse: collapse; width: 100%; margin: 1rem 0; }
th, td { border: 1px solid #ccc; padding: 0.6rem 0.8rem; text-align: left; vertical-align: top; }
th { width: 30%; background: rgba(0,0,0,0.04); white-space: nowrap; }
.notice {
  background: #fff8e1;
  border: 1px solid #e0c568;
  border-radius: 6px;
  padding: 0.9rem 1rem;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}
.updated { color: #888; font-size: 0.85rem; }
nav a { margin-right: 1rem; }
footer { margin-top: 3rem; font-size: 0.85rem; color: #888; }