.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  max-width: none;
  height: 76px;
  padding-left: max(24px, calc((100% - 1180px) / 2));
  padding-right: max(24px, calc((100% - 1180px) / 2));
  background: rgba(244, 246, 248, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(7, 24, 47, 0.12);
}

.article-page .site-header {
  background: rgba(255, 255, 255, 0.94);
}

.question-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px max(24px, calc((100% - 1180px) / 2));
  background: var(--ink);
  color: #fff;
  text-decoration: none;
  font-size: 0.9rem;
}

.question-banner strong {
  color: var(--signal);
  white-space: nowrap;
}

.question-banner:hover strong,
.question-banner:focus-visible strong {
  text-decoration: underline;
}

@media (min-width: 1100px) {
  .hero {
    padding-top: 62px;
    padding-bottom: 82px;
  }

  .hero h1 {
    font-size: clamp(4rem, 5.45vw, 5.55rem);
  }

  .learning-hero {
    padding-top: 60px;
    padding-bottom: 70px;
  }

  .learning-hero h1 {
    font-size: clamp(3.8rem, 5.1vw, 5.15rem);
  }

  .article-head {
    padding-top: 62px;
  }

  .article-head h1 {
    font-size: clamp(3.8rem, 5.35vw, 5.35rem);
  }

  .resource-preview,
  .topics,
  .about {
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .subhero {
    padding-bottom: 48px;
  }

  .split-subhero {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
    align-items: end;
    column-gap: 80px;
    padding-top: 44px;
    padding-bottom: 44px;
  }

  .split-subhero h1 {
    font-size: clamp(3.6rem, 4.6vw, 4.85rem);
  }

  .split-subhero h1,
  .split-subhero .dek {
    margin-bottom: 0;
  }

  .split-subhero .subhero-copy {
    padding-bottom: 10px;
  }

  .split-subhero .text-link {
    display: inline-block;
    margin-top: 24px;
  }
}

.project-page .article-head {
  padding-bottom: 20px;
}

.project-page .prose h2 {
  margin-top: 44px;
}

@media print {
  .project-page .site-header,
  .project-page .question-banner,
  .project-page .site-footer {
    display: none;
  }

  .project-page .article-shell {
    width: 100%;
  }

  .project-page .article-head {
    padding: 0 0 12pt;
  }

  .project-page .article-head h1 {
    margin-bottom: 0;
    font-size: 28pt;
  }

  .project-page .kicker {
    margin-bottom: 8pt;
  }

  .project-page .prose {
    padding-bottom: 0;
  }

  .project-page .prose p,
  .project-page .prose li {
    font-size: 10.5pt;
    line-height: 1.45;
  }

  .project-page .prose h2 {
    margin: 18pt 0 7pt;
    font-size: 19pt;
    break-after: avoid;
  }

  .project-page .prose h2 + p,
  .project-page .prose h2 + ul {
    break-inside: avoid;
  }
}

.article-page:has(nav a[href="/chi-sono/"][aria-current="page"]) .article-head {
  padding-bottom: 14px;
}

.article-navigation {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.article-navigation h2 {
  margin: 0 0 18px;
  font: 800 0.78rem/1.4 var(--body);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.article-navigation-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.article-navigation a {
  display: block;
  padding: 18px;
  border: 1px solid var(--line);
  font: 700 1rem/1.45 var(--body);
  text-decoration: none;
}

.article-navigation a:hover,
.article-navigation a:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

@media (max-width: 620px) {
  .site-header {
    position: sticky;
    top: 0;
    height: auto;
    padding: 12px 14px 9px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    background: rgba(244, 246, 248, 0.97);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }

  .article-page .site-header {
    background: rgba(255, 255, 255, 0.97);
  }

  .site-header .brand {
    line-height: 1.2;
  }

  .site-header nav {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    width: 100%;
    overflow-x: auto;
    padding: 2px 0 5px;
    text-align: left;
    white-space: nowrap;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .site-header nav::-webkit-scrollbar {
    display: none;
  }

  .site-header nav a {
    flex: 0 0 auto;
    font-size: 0.82rem;
  }

  .question-banner {
    padding: 10px 14px;
    gap: 10px;
    font-size: 0.78rem;
  }

  .hero {
    padding-top: 28px;
    padding-bottom: 20px;
  }

  .hero h1,
  .learning-hero h1 {
    font-size: clamp(3.05rem, 12vw, 4rem);
  }

  .topics,
  .about {
    padding: 32px 0;
  }

  .resource-preview {
    padding: 28px 0;
  }

  .topics > h2 {
    margin: 30px 0 34px;
  }

  .resource-grid,
  .about-grid {
    gap: 24px;
    margin-top: 22px;
  }

  .article-page:has(nav a[href="/chi-sono/"][aria-current="page"]) .article-head {
    padding-top: 30px;
    padding-bottom: 8px;
  }

  .article-page:has(nav a[href="/chi-sono/"][aria-current="page"]) .article-head h1 {
    margin-bottom: 0;
  }

  .article-page:has(nav a[href="/chi-sono/"][aria-current="page"]) .prose {
    padding-bottom: 58px;
  }

  .article-page:has(nav a[href="/chi-sono/"][aria-current="page"]) .prose .intro {
    margin-bottom: 24px;
    font-size: clamp(1.3rem, 6.4vw, 1.65rem);
    line-height: 1.48;
  }

  .article-page:has(nav a[href="/chi-sono/"][aria-current="page"]) .prose p {
    line-height: 1.68;
  }

  .article-page .article-head {
    padding-top: 24px;
    padding-bottom: 14px;
  }

  .article-page .article-head h1 {
    margin-bottom: 0;
    font-size: clamp(2.75rem, 11.8vw, 3.8rem);
  }

  .article-page .article-meta {
    margin-top: 20px;
  }

  .article-page .prose {
    padding-bottom: 62px;
  }

  .article-page .prose .intro {
    margin-bottom: 20px;
  }

  .article-page .prose h2 {
    margin: 34px 0 12px;
    font-size: clamp(1.9rem, 8.8vw, 2.4rem);
  }

  .article-page .prose .warning {
    margin: 16px 0 30px;
    padding: 20px;
  }

  .article-navigation {
    margin-top: 38px;
  }

  .article-navigation-links {
    grid-template-columns: 1fr;
  }

  .subhero {
    padding-top: 28px;
    padding-bottom: 30px;
  }

  .subhero h1 {
    margin-bottom: 20px;
    font-size: clamp(2.9rem, 12.5vw, 4rem);
  }

  .subhero .dek {
    margin-bottom: 0;
  }

  .split-subhero {
    display: block;
  }

  .split-subhero .text-link {
    display: inline-block;
    margin-top: 20px;
  }

  .resource-grid h2,
  .about-grid h2 {
    font-size: clamp(2.5rem, 11vw, 3.25rem);
  }

  .topic-grid.four {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topic-grid.four article,
  .topic-grid.four article + article {
    padding: 18px 12px 18px 0;
    min-height: 0;
    border-right: 1px solid var(--line);
  }

  .topic-grid.four article:nth-child(2n) {
    padding-right: 0;
    padding-left: 12px;
    border-right: 0;
  }

  .topic-grid.four h3 {
    margin: 16px 0 8px;
    font-size: 1rem;
  }

  .topic-grid.four p {
    margin-bottom: 0;
    font-size: 0.82rem;
    line-height: 1.5;
  }
}