:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #202124;
  --muted: #5f6368;
  --accent: #1a73e8;
  --rule: #e8eaed;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #202124; --fg: #e8eaed; --muted: #9aa0a6; --accent: #8ab4f8; --rule: #3c4043; }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 20px 64px; }
header { margin-bottom: 32px; }
header img { border-radius: 14px; display: block; margin-bottom: 16px; }
h1 { font-size: 30px; margin: 0 0 8px; }
h2 { font-size: 18px; margin: 32px 0 8px; }
.tagline { color: var(--muted); margin: 0; font-size: 17px; }
section { border-top: 1px solid var(--rule); }
ul { padding-left: 20px; }
li { margin: 6px 0; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.92em; }
a { color: var(--accent); }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--rule); font-size: 14px; }