:root {
  --bg: #ECEEF1;
  --surface: #F8F9FB;
  --line: rgba(20, 24, 30, .10);
  --fg: #14181E;
  --muted: #5B6470;
  --accent: #8E2437;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0D1015; --surface: #151920; --line: rgba(255,255,255,.10); --fg: #E9ECF0; --muted: #9AA3AE; --accent: #E25B6F; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  padding: 32px 16px 64px;
}
main { max-width: 680px; margin: 0 auto; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 28px; }
header img { width: 56px; height: 56px; border-radius: 13px; }
header a { color: inherit; text-decoration: none; font-weight: 600; font-size: 20px; }
h1 { font-size: 30px; line-height: 1.15; margin: 0 0 6px; }
h2 { font-size: 19px; margin: 30px 0 6px; }
p, li { color: var(--fg); }
.muted { color: var(--muted); font-size: 15px; }
a { color: var(--accent); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 4px 20px; margin-top: 20px; }
footer { margin-top: 44px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); display: flex; gap: 18px; flex-wrap: wrap; }
footer a { color: var(--muted); }