:root {
  --bg: #ffffff;
  --text: #1b1d24;
  --muted: #5b6070;
  --accent: #0a7f3f;
  --line: #e3e5ec;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #050805;
    --text: #e8eaf2;
    --muted: #a3a8bb;
    --accent: #00ff66;
    --line: #1d2a21;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans", sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
header img { width: 48px; height: 48px; border-radius: 12px; }
h1 { font-size: 1.7rem; line-height: 1.25; margin: 0; }
h2 { font-size: 1.15rem; margin-top: 2rem; }
a { color: var(--accent); }
.muted { color: var(--muted); font-size: 0.95rem; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); }