:root {
  --navy: #013061;
  --navy-soft: #0f4677;
  --amber: #fda704;
  --amber-soft: #fff4de;
  --amber-border: #f0c36b;
  --ink: #14181f;
  --ink-muted: #5b6472;
  --line: #e4e8ee;
  --bg: #f7f8fa;
  --card: #ffffff;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    Helvetica, Arial, sans-serif;
  line-height: 1.55;
}

a {
  color: var(--navy-soft);
}

.topbar {
  background: linear-gradient(120deg, var(--navy) 0%, #0e5b7d 100%);
  padding: 18px 20px;
}

.topbar-inner {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
  font-weight: 900;
  font-size: 21px;
  color: #ffffff;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.wordmark .q {
  color: var(--amber);
}

.topnav {
  display: flex;
  gap: 18px;
  font-size: 14px;
  font-weight: 600;
}

.topnav a {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
}

.topnav a.active {
  color: #ffffff;
  border-bottom: 2px solid var(--amber);
  padding-bottom: 2px;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

.doc-header h1 {
  font-size: 30px;
  font-weight: 900;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
  color: var(--navy);
}

.doc-meta {
  color: var(--ink-muted);
  font-size: 14px;
  margin: 0 0 24px;
}

.notice {
  background: var(--amber-soft);
  border: 1px solid var(--amber-border);
  border-radius: 14px;
  padding: 14px 16px;
  font-weight: 700;
  font-size: 14.5px;
  line-height: 1.5;
  margin-bottom: 32px;
  color: #5c4108;
}

section.doc-section {
  padding-bottom: 26px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--line);
}

section.doc-section:last-of-type {
  border-bottom: none;
}

section.doc-section h2 {
  font-size: 18px;
  font-weight: 800;
  color: var(--navy);
  margin: 0 0 8px;
}

section.doc-section p {
  margin: 0 0 10px;
  font-size: 15.5px;
  color: #2a2f38;
}

section.doc-section ul {
  margin: 10px 0;
  padding-left: 22px;
}

section.doc-section li {
  margin-bottom: 8px;
  font-size: 15.5px;
  color: #2a2f38;
}

.card-nav {
  display: flex;
  gap: 12px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.card-nav a {
  text-decoration: none;
  font-weight: 700;
}

footer.sitefoot {
  text-align: center;
  color: var(--ink-muted);
  font-size: 13px;
  padding: 28px 20px 40px;
}

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

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eef1f6;
    --ink-muted: #9aa4b2;
    --line: #2a3140;
    --bg: #0b0f16;
    --card: #121826;
    --amber-soft: #241d0c;
    --amber-border: #6b4f11;
  }
  section.doc-section p,
  section.doc-section li {
    color: #d3d9e2;
  }
  .notice {
    color: #f2d99a;
  }
}