@font-face {
  font-family: 'Manrope';
  src: local('Manrope');
  font-display: swap;
}

:root {
  color: #111318;
  background: #f4f6f8;
  font-family: 'Manrope', 'Helvetica Neue', Arial, sans-serif;
  --ink: #111318;
  --muted: #626a75;
  --line: #cdd3da;
  --accent: #1657d9;
  --soft: #dce7ff;
  --shell: min(1180px, calc(100% - 48px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; }
a { color: inherit; text-decoration: none; }
p { color: var(--muted); line-height: 1.75; }
.shell { width: var(--shell); margin-inline: auto; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid rgb(17 19 24 / .1);
  background: rgb(244 246 248 / .92);
  backdrop-filter: blur(16px);
}

.nav {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 15px; font-weight: 850; }
.brand img { width: 36px; height: 36px; object-fit: contain; }
.nav-links { display: flex; align-items: center; gap: 26px; color: #3d444e; font-size: 13px; font-weight: 700; }
.nav-links a:hover { color: var(--accent); }

.page-hero { padding: 100px 0 72px; border-bottom: 1px solid var(--line); }
.crumbs { margin-bottom: 24px; color: var(--accent); font-size: 12px; font-weight: 800; }
.crumbs a:hover { text-decoration: underline; }
.page-hero h1 { max-width: 900px; margin: 0 0 28px; font-size: clamp(48px, 7vw, 92px); font-weight: 680; letter-spacing: -.07em; line-height: .98; }
.page-hero .deck { max-width: 720px; margin: 0; font-size: clamp(18px, 2vw, 23px); }
.meta { display: flex; gap: 18px; margin-top: 32px; color: var(--muted); font-size: 12px; font-weight: 700; flex-wrap: wrap; }

.article-layout { display: grid; grid-template-columns: 250px minmax(0, 740px); gap: clamp(60px, 10vw, 150px); padding: 80px 0 120px; }
.toc { position: sticky; top: 112px; height: max-content; }
.toc strong { display: block; margin-bottom: 16px; font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.toc a { display: block; padding: 8px 0; color: var(--muted); font-size: 13px; }
.toc a:hover { color: var(--accent); }
.article h2 { margin: 74px 0 18px; font-size: clamp(30px, 4vw, 48px); letter-spacing: -.05em; line-height: 1.08; }
.article h2:first-child { margin-top: 0; }
.article h3 { margin: 36px 0 10px; font-size: 22px; letter-spacing: -.03em; }
.article p, .article li { font-size: 16px; }
.article ul, .article ol { display: grid; gap: 12px; margin: 20px 0 30px; padding-left: 22px; color: var(--muted); line-height: 1.65; }
.callout { margin: 38px 0; padding: 28px; border: 1px solid #b9c8e1; border-radius: 18px; background: var(--soft); }
.callout strong { display: block; margin-bottom: 8px; }
.callout p { margin: 0; color: #445269; }
.decision-table { width: 100%; margin: 28px 0; border-collapse: collapse; text-align: left; }
.decision-table th, .decision-table td { padding: 16px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.decision-table th { color: var(--accent); font-size: 11px; letter-spacing: .07em; text-transform: uppercase; }
.decision-table td { color: var(--muted); line-height: 1.55; }
.source-list a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

.info-layout { display: grid; grid-template-columns: minmax(0, 760px); justify-content: center; padding: 80px 0 120px; }
.info-layout h2 { margin: 56px 0 16px; font-size: 32px; letter-spacing: -.04em; }
.info-layout h2:first-child { margin-top: 0; }
.info-layout li { margin-bottom: 10px; color: var(--muted); line-height: 1.7; }
.contact-card { margin-top: 34px; padding: 30px; border: 1px solid var(--line); border-radius: 18px; background: white; }
.contact-card a { color: var(--accent); font-weight: 800; }

.more-guides { padding: 64px 0; border-top: 1px solid var(--line); background: white; }
.more-guides h2 { margin: 0 0 28px; font-size: 30px; letter-spacing: -.04em; }
.guide-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.guide-links a { display: flex; min-height: 120px; flex-direction: column; justify-content: space-between; padding: 22px; border: 1px solid var(--line); border-radius: 16px; font-weight: 750; }
.guide-links a span { color: var(--accent); font-size: 11px; text-transform: uppercase; }
.guide-links a:hover { border-color: var(--accent); }

.site-footer { padding: 34px 0; border-top: 1px solid var(--line); }
.footer-row { display: flex; align-items: center; justify-content: space-between; gap: 24px; color: var(--muted); font-size: 12px; }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a:hover { color: var(--accent); }

@media (max-width: 780px) {
  :root { --shell: calc(100% - 32px); }
  .nav { min-height: 68px; }
  .nav-links a:not(:last-child) { display: none; }
  .page-hero { padding: 68px 0 52px; }
  .page-hero h1 { font-size: clamp(44px, 13vw, 66px); }
  .article-layout { grid-template-columns: 1fr; gap: 40px; padding: 52px 0 86px; }
  .toc { position: static; padding-bottom: 28px; border-bottom: 1px solid var(--line); }
  .decision-table { display: block; overflow-x: auto; }
  .guide-links { grid-template-columns: 1fr; }
  .footer-row { align-items: flex-start; flex-direction: column; }
}