:root {
  color-scheme: light dark;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
}

body {
  margin: 0;
  padding: 16px;
}

main {
  max-width: 680px;
  margin: 8vh auto;
}

h1 { font-size: 2rem; margin-bottom: 0.25rem; }
h2 { font-size: 1.15rem; margin-top: 2rem; }
.lede { font-size: 1.1rem; opacity: 0.8; margin-top: 0; }
a { color: #2563eb; }
@media (prefers-color-scheme: dark) { a { color: #60a5fa; } }