:root {
  --ink: #1b2333;
  --muted: #5a6880;
  --paper: #edf1f3;
  --card: #ffffff;
  --accent: #b5650a;
  --line: #d3dce1;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e9eef2;
    --muted: #a9b5c6;
    --paper: #141a26;
    --card: #1d2433;
    --accent: #ffae1a;
    --line: #2c3547;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 48px 16px 64px; }
header p { color: var(--muted); margin-top: 0; }
h1 { font-size: 2.2rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.25rem; margin-top: 2em; }
a { color: var(--accent); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; margin: 24px 0; }
nav { display: flex; flex-wrap: wrap; gap: 16px; margin: 24px 0; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }