:root {
  color-scheme: dark;
  --bg: #0f1115;
  --surface: #171a21;
  --text: #e8eaed;
  --muted: #a0a6b0;
  --accent: #66c0f4;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 1.8rem; line-height: 1.25; margin: 0 0 8px; }
h2 { font-size: 1.2rem; margin: 32px 0 8px; }
p, li { color: var(--text); }
.muted { color: var(--muted); font-size: .9rem; }
a { color: var(--accent); }
.button {
  display: inline-block;
  margin-top: 16px;
  padding: 12px 20px;
  border-radius: 8px;
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  text-decoration: none;
}
nav { display: flex; flex-wrap: wrap; gap: 16px; margin: 24px 0; }
.card { background: var(--surface); border-radius: 12px; padding: 16px 20px; margin: 16px 0; }
footer { margin-top: 48px; color: var(--muted); font-size: .85rem; }
.top { display: flex; justify-content: space-between; gap: 16px; }
.lang { font-size: .9rem; text-align: right; }