* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.75 var(--font); -webkit-font-smoothing: antialiased; }
a { color: var(--brand-strong); text-underline-offset: 4px; }
button { font: inherit; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 4px; }
.skip-link { position: absolute; top: -100px; left: 16px; z-index: 20; padding: 8px 16px; background: var(--surface); }
.skip-link:focus { top: 12px; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 76px; padding: 14px max(24px, calc((100vw - 1160px) / 2)); background: var(--surface); border-bottom: 1px solid var(--border); }
.site-brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--text); font-size: 19px; font-weight: 600; line-height: 1.3; }
.site-brand small { display: block; font-size: 11px; color: var(--muted); font-weight: 400; }
.site-header nav { display: flex; align-items: center; gap: 22px; }
.header-map { font-size: 14px; font-weight: 500; text-decoration: none; }
main { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 10px; margin: 26px 0 30px; color: var(--muted); font-size: 12px; }
.breadcrumb a { text-decoration: none; }
.hero { display: grid; grid-template-columns: 0.95fr 1.05fr; align-items: center; gap: 46px; padding-bottom: 50px; }
.eyebrow { margin: 0 0 12px; color: var(--brand-strong); font-size: 12px; font-weight: 600; letter-spacing: .08em; }
h1, h2, h3 { margin: 0; font-weight: 600; }
h1 { font-size: clamp(30px, 3.4vw, 44px); line-height: 1.45; letter-spacing: -.02em; }
h2 { font-size: 25px; line-height: 1.5; }
h3 { font-size: 18px; line-height: 1.6; }
.lead { margin: 20px 0 26px; color: var(--text-2); font-size: 17px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 22px; }
.primary-link { display: inline-flex; align-items: center; justify-content: center; gap: 20px; min-height: 46px; padding: 10px 20px; background: var(--brand); border-radius: 9px; color: var(--surface); text-decoration: none; font-weight: 500; }
.primary-link:hover { background: var(--brand-strong); }
.text-link { font-size: 14px; font-weight: 500; }
.hero-note { margin: 20px 0 0; font-size: 12px; color: var(--muted); line-height: 1.7; }
.hero-art { margin: 0; min-width: 0; }
.hero-art img { display: block; width: 100%; height: auto; border-radius: 18px; border: 1px solid var(--border); background: #f4f6f9; }
.feature-section { padding: 30px 0 48px; border-top: 1px solid var(--border); }
.section-heading { margin-bottom: 24px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-grid article { padding: 24px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.feature-grid p { margin: 12px 0 0; color: var(--text-2); font-size: 14px; }
.reading-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 58px; padding: 36px 0 48px; border-top: 1px solid var(--border); }
.steps { margin: 26px 0 0; padding-left: 24px; }
.steps li { padding-left: 10px; margin-bottom: 22px; }
.steps li::marker { color: var(--brand); font-weight: 600; }
.steps strong { font-weight: 500; }
.steps p { margin: 7px 0 0; color: var(--text-2); font-size: 14px; }
.sources { margin: 24px 0; }
.sources div { padding: 14px 0; border-bottom: 1px solid var(--border); }
.sources dt { font-weight: 500; font-size: 14px; }
.sources dd { margin: 4px 0 0; font-size: 13px; color: var(--text-2); }
.source-note { color: var(--muted); font-size: 13px; }
.faq { padding: 36px 0 48px; border-top: 1px solid var(--border); }
.faq h2 { margin-bottom: 24px; }
.faq details { padding: 18px 0; border-bottom: 1px solid var(--border); }
.faq summary { cursor: pointer; font-weight: 500; }
.faq p { margin: 12px 0 0; max-width: 900px; color: var(--text-2); font-size: 14px; }
.site-footer { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 22px max(24px, calc((100vw - 1160px) / 2)); background: var(--surface); border-top: 1px solid var(--border); font-size: 12px; color: var(--muted); }
.site-footer a { color: var(--text); text-decoration: none; font-weight: 600; }
@media (max-width: 800px) {
  .hero { grid-template-columns: 1fr; gap: 30px; }
  .hero-art { max-width: 640px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid article { padding: 22px; }
  .reading-grid { grid-template-columns: 1fr; gap: 26px; }
}
@media (max-width: 420px) {
  main { width: calc(100% - 32px); }
  .site-header, .site-footer { padding-left: 16px; padding-right: 16px; }
  .site-header nav { gap: 12px; }
  .site-brand { font-size: 17px; }
  h1 { font-size: 30px; }
  .lead { font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }