:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #475467;
  --border: #e2e6ec;
  --brand: #5b3fd1;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1015;
    --surface: #171a21;
    --text: #f2f4f7;
    --muted: #b3bac6;
    --border: #2a2f3a;
    --brand: #a996ff;
  }
}

* { box-sizing: border-box; }

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

main {
  max-width: 760px;
  margin: 32px auto;
  padding: 32px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
}

@media (max-width: 600px) {
  main { margin: 0; border-radius: 0; border: none; padding: 24px 16px; }
}

h1 { font-size: 1.9rem; line-height: 1.2; letter-spacing: -0.02em; margin: 0.2em 0 0.3em; }
h2 { font-size: 1.15rem; margin: 1.8em 0 0.4em; }
p, li { color: var(--text); }
.lead, .updated { color: var(--muted); }
.updated { font-size: 0.9rem; margin-top: 0; }
.brand { font-weight: 700; color: var(--brand); margin: 0; }
.brand a { text-decoration: none; }
.lang { font-size: 0.9rem; color: var(--muted); margin-bottom: 8px; }
a { color: var(--brand); }
hr { border: none; border-top: 1px solid var(--border); margin: 48px 0; }
ul, ol { padding-left: 1.3em; }
li { margin: 0.3em 0; }
.links li { margin: 0.6em 0; }