.learn-page { background: var(--paper); }
.learn-page .site-header { position: relative; border-bottom: 1px solid var(--line); background: var(--paper); }
.learn-main, .learn-footer { width: min(1180px, calc(100% - 80px)); margin-inline: auto; }
.breadcrumbs { padding-block: 30px; font-size: 13px; color: var(--muted); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0; }
.breadcrumbs li + li::before { content: '/'; margin-right: 8px; opacity: .55; }
.breadcrumbs a { text-underline-offset: 3px; }
.library-hero { display: grid; grid-template-columns: 1.1fr 1fr; gap: 64px; align-items: center; padding-block: 35px 80px; }
.library-hero h1 { font-size: clamp(50px, 6.6vw, 89px); }
.library-hero h1 em { color: var(--accent); }
.library-intro { max-width: 450px; font-size: 18px; line-height: 1.7; margin-block: 25px 10px; }
.library-hero figure { margin: 0; }
.library-hero img { width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; border-radius: 48% 48% 5px 5px; }
.library-hero figcaption { font: italic 16px Georgia, serif; margin-top: 15px; text-align: center; color: var(--muted); }
.learn-page h2 { font-size: clamp(29px, 3.5vw, 43px); line-height: 1.15; }
.learn-page h3 { font-size: 25px; line-height: 1.18; }
.learn-page p { line-height: 1.75; }
.topic-section { border-top: 1px solid var(--line); padding-top: 45px; }
.topic-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 50px; }
.topic-card { display: grid; grid-template-columns: 32px 1fr; gap: 20px; padding-block: 30px; border-bottom: 1px solid var(--line); text-decoration: none; }
.topic-number { font: 500 13px var(--display); color: var(--accent); padding-top: 6px; }
.topic-card p { font-size: 15px; color: var(--muted); margin-block: 12px; }
.topic-card:hover h3, .guide-link:hover h3 { text-decoration: underline; text-underline-offset: 5px; }
.read-link { font-size: 13px; font-weight: 600; display: inline-block; padding-block: 6px; }
.library-about { max-width: 730px; padding-block: 70px 20px; }
.topic-heading { max-width: 820px; padding-block: 30px 10px; }
.topic-heading h1 { font-size: clamp(47px, 6vw, 76px); }
.topic-guidance { max-width: 760px; margin-block: 20px 45px; }
.topic-guidance h2 { font-size: 25px; }
.topic-guidance p { color: var(--muted); }
.guide-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; list-style: none; padding: 0; margin: 0; }
.guide-grid > li { display: flex; min-width: 0; }
.guide-link { display: flex; flex-direction: column; width: 100%; padding: 27px; border: 1px solid var(--line); border-radius: 3px; background: #faf6e9; text-decoration: none; }
.guide-link p { color: var(--muted); font-size: 15px; margin-block: 6px 20px; }
.guide-link .read-link { margin-top: auto; }
.other-topics { margin-top: 55px; }
.other-topics h2 { font-size: 25px; }
.other-topics a { display: inline-flex; align-items: center; min-height: 44px; margin-right: 26px; text-underline-offset: 4px; font-size: 15px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 750px) minmax(180px, 1fr); gap: 70px; padding-top: 25px; align-items: start; }
.article-layout > article { min-width: 0; }
.article-heading h1 { font-size: clamp(42px, 5.2vw, 65px); line-height: 1.04; text-wrap: balance; }
.category-label { display: inline-block; text-decoration: none; color: var(--accent); }
.article-meta { font-size: 12px; color: var(--muted); margin-block: 24px; }
.answer { font-size: 20px; line-height: 1.7; margin-block: 25px 30px; }
.article-body { font-size: 17px; }
.article-body section { margin-top: 40px; scroll-margin-top: 30px; }
.article-body h2 { font-size: 30px; margin-bottom: 16px; }
.article-body p, .article-body li { color: var(--ink); line-height: 1.8; }
.article-body ul, .article-body ol { padding-left: 24px; }
.article-body li { padding-left: 6px; margin-bottom: 12px; }
.comparison-disclosure { font-size: 13px; color: var(--muted); padding: 16px 20px; border-left: 3px solid var(--accent); background: #e9e9dc; }
.comparison-hint { display: none; }
.comparison-scroll { max-width: 100%; overflow-x: auto; margin-block: 24px; border: 1px solid var(--line); border-radius: 3px; }
.comparison-scroll table { width: 100%; min-width: 560px; border-collapse: collapse; font-size: 14px; line-height: 1.6; text-align: left; }
.comparison-scroll caption { padding: 17px 20px; font-weight: 600; text-align: left; background: #e9e9dc; }
.comparison-scroll th, .comparison-scroll td { padding: 14px 18px; vertical-align: top; border-top: 1px solid var(--line); }
.comparison-scroll thead { background: #faf6e9; }
.comparison-scroll th[scope="row"] { min-width: 125px; font-weight: 600; }
.article-sidebar { position: sticky; top: 30px; margin-top: 10px; padding-left: 25px; border-left: 1px solid var(--line); }
.article-sidebar .eyebrow { margin-bottom: 15px; }
.article-sidebar ol { padding-left: 20px; font-size: 14px; }
.article-sidebar a { display: inline-block; padding-block: 10px; line-height: 1.5; text-underline-offset: 4px; }
.back-to-topic { font-size: 13px; margin-top: 14px; }
.mobile-contents { display: none; }
.article-sources { border-top: 1px solid var(--line); margin-top: 45px; padding-top: 26px; }
.article-sources h2 { font-size: 22px; }
.article-sources li { font-size: 14px; padding-block: 7px; overflow-wrap: anywhere; }
.article-sources ul { padding-left: 20px; }
.editorial-note { font-size: 13px; color: var(--muted); margin-top: 24px; }
.related { margin-top: 65px; }
.learn-cta { margin-block: 75px 40px; padding: 38px 42px; background: #e2e5d4; border-radius: 3px; display: flex; gap: 30px; align-items: center; justify-content: space-between; }
.learn-cta .eyebrow { margin-bottom: 16px; }
.learn-cta h2 { font-size: 35px; margin-bottom: 0; }
.learn-cta p { margin-bottom: 0; }
.learn-cta .button { flex-shrink: 0; }
.learn-footer { border-top: 1px solid var(--line); }
.learn-page :focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
@media (max-width: 960px) {
  .learn-main, .learn-footer { width: calc(100% - 48px); }
  .library-hero { gap: 30px; }
  .guide-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: minmax(0, 1fr) 200px; gap: 30px; }
  .learn-footer nav { flex-wrap: wrap; gap: 6px 20px; }
}
@media (max-width: 720px) {
  .comparison-hint { display: block; font-size: 13px; color: var(--muted); }
  .learn-page .site-header { padding: 24px; gap: 20px; flex-wrap: wrap; }
  .learn-page .site-header nav { display: flex; gap: 15px; order: 3; width: 100%; }
  .learn-page .site-header > .button { display: inline-flex; margin-left: auto; }
  .breadcrumbs { padding-block: 24px; font-size: 12px; }
  .library-hero { grid-template-columns: 1fr; padding-block: 15px 45px; }
  .library-hero h1 { font-size: clamp(50px, 10vw, 74px); }
  .library-hero figure { max-width: 450px; }
  .library-hero img { aspect-ratio: 1.45; border-radius: 140px 140px 3px 3px; }
  .topic-grid, .article-layout { grid-template-columns: 1fr; }
  .topic-card { grid-template-columns: 24px 1fr; gap: 15px; }
  .article-sidebar { display: none; }
  .article-heading h1 { font-size: clamp(39px, 8.7vw, 60px); }
  .answer { font-size: 18px; }
  .mobile-contents { display: block; border-block: 1px solid var(--line); padding-block: 10px; }
  .mobile-contents summary { padding-block: 12px; cursor: pointer; font-weight: 600; }
  .mobile-contents a { display: inline-block; padding-block: 10px; font-size: 14px; }
  .learn-cta { display: block; padding: 28px; }
  .learn-cta .button { margin-top: 25px; }
  .learn-cta h2 { font-size: 31px; }
}
@media (max-width: 520px) {
  .guide-grid { grid-template-columns: 1fr; }
  .guide-link { padding: 24px; }
  .learn-main, .learn-footer { width: calc(100% - 40px); }
  .learn-page .wordmark { font-size: 32px; }
  .article-meta { max-width: 280px; }
}