:root {
  --ink: #020826;
  --muted: #4c5d7a;
  --line: #dbe7f5;
  --surface: #ffffff;
  --canvas: #f7fbff;
  --blue: #0068f0;
  --blue-dark: #0039b8;
  --cyan-soft: #eaf7ff;
  --yellow-soft: #fff7cc;
  --green-soft: #e8f8ef;
  --green: #087a48;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: var(--ink); background: var(--canvas); }
a { color: var(--blue-dark); text-underline-offset: 3px; }
a:hover { color: var(--blue); }
.site-header { border-bottom: 1px solid var(--line); background: rgba(247, 251, 255, .96); }
.nav, .wrap { width: min(1040px, calc(100% - 32px)); margin: 0 auto; }
.nav { min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand img { width: 238px; max-width: 56vw; height: auto; display: block; }
.nav-links { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 4px; }
.nav-links a { min-height: 40px; display: inline-flex; align-items: center; padding: 0 11px; border-radius: 8px; color: #24395f; text-decoration: none; font-size: 14px; font-weight: 760; }
.nav-links a:hover, .nav-links a:focus-visible, .nav-links a[aria-current="page"] { background: var(--cyan-soft); color: var(--blue-dark); box-shadow: inset 0 -2px 0 #00b8f0; }
.hero { padding: 56px 0 28px; }
.eyebrow { margin: 0 0 12px; color: #0049d7; font-size: 13px; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
h1 { max-width: 820px; margin: 0 0 18px; font-size: 58px; line-height: 1.04; letter-spacing: 0; }
.lede { max-width: 760px; margin: 0; color: var(--muted); font-size: 19px; line-height: 1.7; }
.meta { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 22px; color: var(--muted); font-size: 14px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 48px; align-items: start; padding: 20px 0 64px; }
.article { min-width: 0; }
.article h2 { margin: 48px 0 14px; font-size: 29px; line-height: 1.18; letter-spacing: 0; }
.article h3 { margin: 28px 0 10px; font-size: 20px; line-height: 1.3; letter-spacing: 0; }
.article p, .article li { color: var(--muted); font-size: 16px; line-height: 1.75; }
.article li + li { margin-top: 8px; }
.article table { width: 100%; margin: 22px 0 30px; border-collapse: collapse; background: var(--surface); border: 1px solid var(--line); }
.article th, .article td { padding: 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; color: var(--muted); line-height: 1.55; }
.article th { color: #06255f; background: var(--cyan-soft); }
.article tr:last-child td { border-bottom: 0; }
.callout { margin: 28px 0; padding: 18px 20px; border-left: 4px solid var(--blue); border-radius: 0 8px 8px 0; background: var(--cyan-soft); }
.callout.warning { border-left-color: #d19a00; background: var(--yellow-soft); }
.callout.success { border-left-color: var(--green); background: var(--green-soft); }
.callout p { margin: 0; color: #24395f; }
.checklist { padding-left: 0; list-style: none; }
.checklist li { position: relative; padding-left: 30px; }
.checklist li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--green); font-weight: 900; }
.side-nav { position: sticky; top: 18px; padding: 18px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
.side-nav strong { display: block; margin-bottom: 10px; color: #06255f; }
.side-nav a { display: block; padding: 7px 0; font-size: 14px; line-height: 1.4; }
.cta-band { margin: 50px 0 0; padding: 28px; border-radius: 8px; background: #06255f; color: #fff; }
.cta-band h2 { margin: 0 0 10px; color: #fff; }
.cta-band p { color: #dbe7f5; }
.button { display: inline-flex; min-height: 44px; align-items: center; padding: 0 16px; border-radius: 8px; background: #fff; color: #06255f; text-decoration: none; font-weight: 850; }
.guide-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; padding: 20px 0 64px; }
.guide-card { display: block; min-height: 210px; padding: 22px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); color: inherit; text-decoration: none; }
.guide-card:hover { border-color: #8dc9ff; box-shadow: 0 10px 28px rgba(0, 57, 184, .08); }
.guide-card .tag { color: #0049d7; font-size: 12px; font-weight: 900; text-transform: uppercase; }
.guide-card h2 { margin: 14px 0 10px; font-size: 23px; line-height: 1.2; }
.guide-card p { margin: 0; color: var(--muted); line-height: 1.65; }
.site-footer { padding: 34px 0; border-top: 1px solid var(--line); background: #eef6ff; }
.footer-inner { display: flex; justify-content: space-between; gap: 28px; align-items: flex-start; }
.footer-inner img { width: min(300px, 70vw); display: block; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 12px 18px; }
.footer-links a { font-size: 14px; font-weight: 700; }
@media (max-width: 780px) {
  .nav { align-items: flex-start; flex-direction: column; padding: 16px 0; gap: 12px; }
  .nav-links { justify-content: flex-start; }
  .hero { padding-top: 40px; }
  .article-layout { grid-template-columns: 1fr; gap: 28px; }
  .side-nav { position: static; order: -1; }
  .guide-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; }
  .footer-links { justify-content: flex-start; }
  .article table { display: block; overflow-x: auto; }
}
@media (max-width: 480px) {
  .nav-links a { padding: 0 8px; font-size: 13px; }
  h1 { font-size: 38px; }
  .lede { font-size: 17px; }
  .article h2 { font-size: 25px; }
}