:root {
  color-scheme: light;
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --accent: #7c3aed;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0f1424;
    --card: #151b2e;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --line: #273153;
    --accent: #a78bfa;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

header.hero {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

header.hero img {
  width: 72px;
  height: 72px;
  border-radius: 18px;
}

h1 {
  font-size: 28px;
  line-height: 1.2;
  margin: 0;
}

h2 {
  font-size: 20px;
  margin: 32px 0 8px;
}

h3 {
  font-size: 16px;
  margin: 20px 0 4px;
}

p,
li {
  margin: 6px 0;
}

.muted {
  color: var(--muted);
}

a {
  color: var(--accent);
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  margin: 16px 0;
}

nav.lang {
  display: flex;
  gap: 12px;
  margin: 8px 0 0;
  font-size: 14px;
}

hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 40px 0;
}