:root {
  --bg: #fbfbfa;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: #e3e3e0;
  --accent: #0b5cad;
  --card: #ffffff;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161617;
    --text: #f2f2f2;
    --muted: #a1a1a6;
    --line: #2f2f31;
    --accent: #6cb0ff;
    --card: #1f1f21;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 64px;
}

header.site {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 20px 0;
  font-size: 15px;
}

header.site a { color: var(--muted); text-decoration: none; }
header.site a:hover { color: var(--text); }

h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.3rem; margin: 40px 0 8px; }
h3 { font-size: 1.05rem; margin: 24px 0 4px; }

p, ul { margin: 0 0 14px; }
ul { padding-left: 1.2em; }

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

.lead { color: var(--muted); font-size: 1.1rem; margin-bottom: 24px; }
.muted { color: var(--muted); font-size: 0.95rem; }

.lang {
  display: flex;
  gap: 12px;
  margin: 0 0 32px;
  font-size: 15px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px 22px;
  margin: 16px 0;
}

.card p:last-child { margin-bottom: 0; }

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 56px 0 40px;
}

footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px 40px;
  color: var(--muted);
  font-size: 14px;
}

footer a { color: var(--muted); }