:root {
  --bg: #ffffff;
  --text: #1c1c1e;
  --muted: #5f6368;
  --accent: #008575;
  --rule: #e3e3e6;
  --panel: #f4f7f6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111414;
    --text: #f2f2f2;
    --muted: #a5adab;
    --accent: #00dac3;
    --rule: #2a302f;
    --panel: #1a201f;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, 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 a { color: inherit; text-decoration: none; font-weight: 700; font-size: 20px; }
.mark { width: 36px; height: 36px; border-radius: 9px; background: #0a403b; color: #00dac3; display: grid; place-items: center; font-weight: 800; }
h1 { font-size: 30px; line-height: 1.2; margin: 8px 0 4px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
p, li { color: var(--text); }
.muted { color: var(--muted); font-size: 15px; }
a { color: var(--accent); }
.panel { background: var(--panel); border: 1px solid var(--rule); border-radius: 12px; padding: 16px 18px; margin: 16px 0; }
ul { padding-left: 22px; }
footer { border-top: 1px solid var(--rule); margin-top: 48px; padding-top: 16px; font-size: 14px; color: var(--muted); }
footer a { margin-right: 16px; }