:root {
  color-scheme: light dark;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans JP", sans-serif;
  max-width: 700px;
  margin: 0 auto;
  padding: 24px 16px;
  line-height: 1.8;
  color: #333;
  background-color: #fff;
}

h1 { font-size: 1.5rem; margin-bottom: 0.5rem; }
h2 { font-size: 1.15rem; margin-top: 2rem; }
a { color: #1a73e8; }

.meta { color: #666; font-size: 0.9rem; }

nav { margin-top: 1.5rem; }
nav a { margin-right: 1rem; }

@media (prefers-color-scheme: dark) {
  body { background-color: #1a1a1a; color: #dcdcdc; }
  a { color: #6ea2f7; }
  .meta { color: #949494; }
}