:root {
  --bg: #15191e;
  --surface: #252c33;
  --text: #f0f3f1;
  --muted: #b7c1c7;
  --accent: #a8dfcb;
  --line: #48535c;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 40px 20px 64px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }
header img { height: 34px; width: auto; display: block; }
nav { display: flex; gap: 16px; font-size: 15px; }
a { color: var(--accent); }
a:hover { color: var(--text); }
h1 { font-size: 34px; line-height: 1.2; margin: 0 0 8px; font-weight: 600; }
h2 { font-size: 21px; margin: 36px 0 8px; font-weight: 600; }
p, li { color: var(--text); }
.lead { color: var(--muted); font-size: 18px; margin: 0 0 24px; }
.meta { color: var(--muted); font-size: 14px; margin: 0 0 28px; }
.card { background: var(--surface); border-radius: 16px; padding: 20px 22px; margin: 24px 0; }
.card p { margin: 0; }
ul { padding-left: 22px; }
li { margin: 6px 0; }
footer { margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
@media (max-width: 480px) {
  body { font-size: 16px; }
  h1 { font-size: 28px; }
  header img { height: 28px; }
}