:root {
  --ink: #18181b;
  --muted: #52525b;
  --paper: #f4f4f5;
  --card: #ffffff;
  --line: #e4e4e7;
  --accent: #c81e1e;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #fafafa;
    --muted: #a1a1aa;
    --paper: #09090b;
    --card: #18181b;
    --line: #27272a;
    --accent: #f87171;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 18px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}
header { display: flex; align-items: center; gap: 16px; margin-bottom: 32px; }
header img { width: 64px; height: 64px; border-radius: 15px; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0; }
h2 { font-size: 1.25rem; margin: 40px 0 8px; }
p, li { color: var(--ink); }
.muted { color: var(--muted); }
a { color: var(--accent); }
section {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 8px 24px 16px;
  margin-top: 24px;
}