:root {
  color-scheme: light dark;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

body {
  margin: 0;
  background: #f6f8fb;
  color: #172033;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 20px 72px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
}

a { color: #2457d6; }
h1, h2 { line-height: 1.25; }
h2 { margin-top: 32px; }
.meta { color: #566176; }
.notice {
  padding: 16px;
  border: 1px solid #bdc8dc;
  border-radius: 12px;
  background: #ffffff;
}

@media (prefers-color-scheme: dark) {
  body { background: #101522; color: #edf1fa; }
  a { color: #9cb8ff; }
  .meta { color: #b4bdd0; }
  .notice { background: #192133; border-color: #34415b; }
}