:root {
  --bg: #F7F9FB; --surface: #FFFFFF; --text: #1B1F24; --text-2: #565E68; --border: #E4E9EE;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14181D; --surface: #1C2127; --text: #EEF1F4; --text-2: #A9B1BA; --border: #2B323A; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", sans-serif;
}
.wrap { max-width: 680px; margin: 0 auto; padding: 0 20px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 24px 0 8px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--text); text-decoration: none; font-weight: 700; }
.brand img { width: 40px; height: 40px; border-radius: 10px; }
nav { display: flex; gap: 16px; font-size: 14px; }
a { color: var(--text); }
nav a { color: var(--text-2); }
main { padding: 24px 0 64px; }
h1 { font-size: 28px; line-height: 1.3; margin: 0 0 8px; }
h2 { font-size: 18px; margin: 32px 0 8px; }
p, li { color: var(--text-2); }
.lead { font-size: 18px; color: var(--text); }
.updated { font-size: 13px; }
section.lang { border-top: 1px solid var(--border); margin-top: 48px; padding-top: 8px; }
.contact { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 16px 20px; }
footer { border-top: 1px solid var(--border); padding: 24px 0 40px; font-size: 13px; color: var(--text-2); }