:root {
  --bg: #0f1115;
  --fg: #f2f2f2;
  --muted: #9aa0a6;
  --accent: #e63946;
  --link: #ffb4b4;
}
@media (prefers-color-scheme: light) {
  :root { --bg: #ffffff; --fg: #1a1a1a; --muted: #5f6368; --link: #b3202c; }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--fg); }
body {
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  padding: 24px 16px;
}
main { max-width: 640px; width: 100%; }
h1 { font-size: 40px; margin: 0 0 8px; letter-spacing: -0.02em; }
h1::before { content: ""; display: inline-block; width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent); margin-right: 12px; vertical-align: middle; }
h2 { font-size: 22px; margin: 28px 0 8px; }
p { margin: 0 0 12px; }
.muted { color: var(--muted); }
nav { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 24px; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
footer { margin-top: 40px; color: var(--muted); font-size: 14px; }