:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --brand: #1d4ed8;
  --brand-dark: #1e3a8a;
  --accent: #f59e0b;
  --line: #e5e7eb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --card: #171a21;
    --text: #f3f4f6;
    --muted: #a1a1aa;
    --brand: #93b4ff;
    --brand-dark: #1e3a8a;
    --line: #2a2e36;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
header.hero {
  background: linear-gradient(135deg, #2563eb, #1e3a8a);
  color: #fff;
  padding: 40px 16px 32px;
}
.wrap { max-width: 780px; margin: 0 auto; padding: 0 16px; }
.brand { display: flex; align-items: center; gap: 14px; }
.brand img { width: 56px; height: 56px; border-radius: 14px; box-shadow: 0 6px 18px #0004; }
.brand b { font-size: 24px; letter-spacing: -.3px; }
.brand span { display: block; opacity: .85; font-size: 14px; }
header h1 { margin: 22px 0 4px; font-size: 30px; line-height: 1.15; letter-spacing: -.5px; }
header p { margin: 0; opacity: .9; }
nav.lang { margin-top: 18px; display: flex; gap: 8px; flex-wrap: wrap; }
nav.lang a {
  color: #fff; text-decoration: none; font-weight: 600; font-size: 14px;
  padding: 6px 14px; border-radius: 20px; background: #ffffff22; border: 1px solid #ffffff44;
}
main { padding: 24px 0 48px; }
section.doc {
  background: var(--card); border: 1px solid var(--line); border-radius: 18px;
  padding: 8px 24px 24px; margin-bottom: 24px;
}
section.doc > h2 { font-size: 24px; margin: 20px 0 4px; letter-spacing: -.3px; }
h3 { font-size: 17px; margin: 26px 0 6px; color: var(--brand); }
p, li { color: var(--text); }
.meta { color: var(--muted); font-size: 14px; margin-top: 0; }
ul { padding-left: 22px; }
li { margin: 4px 0; }
a { color: var(--brand); }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; margin: 8px 0; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--line); vertical-align: top; overflow-wrap: anywhere; hyphens: auto; }
table { table-layout: fixed; }
th { color: var(--muted); font-weight: 600; }
.box {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border-left: 4px solid var(--accent); padding: 10px 14px; border-radius: 8px; margin: 14px 0;
}
details { border-bottom: 1px solid var(--line); padding: 12px 0; }
summary { cursor: pointer; font-weight: 600; }
details p { margin: 8px 0 0; color: var(--muted); }
.cta {
  display: inline-block; background: var(--brand-dark); color: #fff; text-decoration: none;
  padding: 12px 20px; border-radius: 14px; font-weight: 700; margin-top: 8px;
}
footer { text-align: center; color: var(--muted); font-size: 13px; padding: 0 16px 40px; }
footer a { color: var(--muted); }
@media (max-width: 520px) {
  header h1 { font-size: 25px; }
  section.doc { padding: 4px 16px 18px; }
  th, td { padding: 8px 4px; font-size: 13px; }
}