:root {
  color-scheme: light dark;
}

body {
  margin: 0;
  padding: 0;
  background: #ffffff;
  color: #1a1a1a;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

main {
  max-width: 680px;
  margin: 0 auto;
}

h1 {
  color: #171724;
}

.summary {
  background: #f4f6f8;
  border-radius: 10px;
}

.summary p {
  margin: 0;
}

a {
  color: #3b5bdb;
}

@media (prefers-color-scheme: dark) {
  body { background: #121212; color: #e6e6e6; }
  .summary { background: #1c1c1e; }
  a { color: #8ab4ff; }
}