:root {
  --ink: #0c1222;
  --ink-soft: #3c4a5e;
  --faint: #5c6b80;
  --line: #e6e8ee;
  --line-strong: #d5d9e2;
  --bg: #ffffff;
  --wash: #f4f6f8;
  --accent: #1e4d8c;
  --navy: #0c1222;
  --nav-h: 64px;
  --max: 840px;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Helvetica, Arial, sans-serif;
  --display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Helvetica, Arial, sans-serif;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: var(--accent); }
h1, h2, h3, p { margin: 0; }
ul { margin: 0; padding-left: 1.2em; }
li + li { margin-top: 0.45em; }

.wrap {
  width: min(var(--max), calc(100% - clamp(32px, 5vw, 48px)));
  margin-inline: auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  width: min(1160px, calc(100% - clamp(32px, 5vw, 48px)));
  margin-inline: auto;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: 28px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-family: var(--display);
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -0.04em;
  color: var(--ink);
}
.logo img { width: 28px; height: 28px; display: block; }
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 14.5px;
  font-weight: 500;
  padding: 8px 10px;
  border-radius: 8px;
}
.nav-links a:hover { color: var(--ink); background: var(--wash); }

.page { padding: 64px 0 96px; }
.eyebrow {
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 14px;
}
h1 {
  font-family: var(--display);
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.08;
  text-wrap: balance;
}
.lede {
  margin-top: 16px;
  color: var(--ink-soft);
  font-size: 18px;
  max-width: 46ch;
}
.meta {
  margin-top: 12px;
  color: var(--faint);
  font-size: 14px;
}
.content { margin-top: 40px; }
.content h2 {
  font-family: var(--display);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin: 36px 0 12px;
}
.content h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 28px 0 8px;
}
.content p { color: var(--ink-soft); margin: 0 0 14px; max-width: 68ch; }
.content a { color: var(--accent); }
.note {
  margin-top: 28px;
  padding: 14px 16px;
  background: var(--wash);
  border-radius: 12px;
  color: var(--faint);
  font-size: 14.5px;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  margin: 18px 0 28px;
}
th, td {
  text-align: left;
  vertical-align: top;
  padding: 12px 10px;
  border-bottom: 1px solid var(--line);
}
th { color: var(--faint); font-weight: 600; }

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  color: var(--faint);
  font-size: 13.5px;
}
.footer a { color: var(--ink-soft); text-decoration: none; }
.footer a:hover { color: var(--ink); }
.footer-row {
  width: min(1160px, calc(100% - clamp(32px, 5vw, 48px)));
  margin-inline: auto;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
  align-items: center;
  margin-bottom: 20px;
  font-size: 13.5px;
  color: var(--faint);
}
.breadcrumbs a {
  color: var(--ink-soft);
  text-decoration: none;
}
.breadcrumbs a:hover { color: var(--ink); }
.breadcrumbs .sep { color: var(--line-strong); }

.answer-first {
  margin-top: 28px;
  padding: 18px 20px;
  background: var(--wash);
  border-left: 3px solid var(--accent);
  border-radius: 0 12px 12px 0;
  color: var(--ink-soft);
  font-size: 16.5px;
  line-height: 1.55;
  max-width: 68ch;
}
.answer-first strong { color: var(--ink); font-weight: 600; }

.related {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.related h2 {
  font-family: var(--display);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}
.related ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}
.related a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}
.related a:hover { text-decoration: underline; }
.related span {
  display: block;
  color: var(--faint);
  font-size: 14px;
  font-weight: 400;
  margin-top: 2px;
}

.guide-toc {
  margin: 28px 0 8px;
  padding: 16px 18px;
  background: var(--wash);
  border-radius: 12px;
}
.guide-toc p {
  margin: 0 0 10px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.guide-toc ol {
  margin: 0;
  padding-left: 1.2em;
  color: var(--ink-soft);
  font-size: 15px;
}
.guide-toc li + li { margin-top: 6px; }
.guide-toc a { color: var(--accent); text-decoration: none; }
.guide-toc a:hover { text-decoration: underline; }

.cta-band {
  margin-top: 36px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}
.cta-band p { margin: 0 0 14px; color: var(--ink-soft); max-width: 56ch; }
.cta-band a.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 14.5px;
  padding: 10px 16px;
  border-radius: 10px;
}
.cta-band a.btn:hover { filter: brightness(0.95); }
.cta-band a.text {
  margin-left: 14px;
  color: var(--accent);
  font-weight: 500;
  text-decoration: none;
}
.cta-band a.text:hover { text-decoration: underline; }

.content dl {
  margin: 0 0 20px;
  max-width: 68ch;
}
.content dt {
  font-weight: 600;
  color: var(--ink);
  margin-top: 14px;
}
.content dd {
  margin: 4px 0 0;
  color: var(--ink-soft);
}

.hub-grid {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}
@media (min-width: 720px) {
  .hub-grid { grid-template-columns: 1fr 1fr; }
}
.hub-card {
  display: block;
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  text-decoration: none;
  color: inherit;
  background: #fff;
}
.hub-card:hover { border-color: var(--line-strong); background: var(--wash); }
.hub-card strong {
  display: block;
  font-size: 16.5px;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}
.hub-card span {
  display: block;
  color: var(--faint);
  font-size: 14.5px;
  line-height: 1.45;
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .page { padding-top: 40px; }
}