.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  min-height: var(--header-height);
  border-bottom: 1px solid var(--border);
  background: var(--header-surface);
  color: var(--header-ink);
  backdrop-filter: blur(12px);
}

.header-inner,
.site-footer-inner,
.page-width,
.docs-shell {
  width: min(calc(100% - (2 * var(--page-gutter))), var(--content-max));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  min-height: var(--header-height);
  align-items: center;
  gap: var(--space-5);
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  display: block;
  width: auto;
  height: 3.15rem;
  max-width: min(15rem, 30vw);
  object-fit: contain;
}

.header-search {
  display: flex;
  min-width: 0;
  flex: 1 1 20rem;
  max-width: 34rem;
  margin-left: auto;
}

.header-actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: var(--space-2);
}

.header-link {
  flex: 0 0 auto;
}

.site-main {
  min-height: calc(100vh - var(--header-height));
}

.docs-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr) var(--toc-width);
  gap: clamp(1.5rem, 4vw, 4rem);
  padding: var(--space-10) 0 var(--space-12);
}

[data-page-type="home"] .docs-shell {
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
}

.docs-sidebar {
  align-self: start;
  position: sticky;
  top: calc(var(--header-height) + var(--space-6));
  max-height: calc(100vh - var(--header-height) - var(--space-10));
  overflow-y: auto;
  padding-right: var(--space-3);
}

.article-column {
  min-width: 0;
  max-width: var(--reading-max);
}

[data-page-type="home"] .article-column {
  max-width: none;
}

.article-aside {
  align-self: start;
  position: sticky;
  top: calc(var(--header-height) + var(--space-6));
  max-height: calc(100vh - var(--header-height) - var(--space-10));
  overflow-y: auto;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.site-footer-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  padding: var(--space-6) 0;
  text-align: center;
}

.mobile-menu-button,
.mobile-sidebar-panel,
.drawer-backdrop {
  display: none;
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.mobile-drawer-header h2 {
  margin: 0;
  font-size: 1.15rem;
}

.no-js .nav-section.is-collapsed .nav-section-list {
  display: block;
}

.no-js .nav-section-toggle {
  cursor: default;
}

.no-js .nav-section-toggle::after {
  display: none;
}

.homepage-hero {
  padding: clamp(3rem, 9vw, 7rem) 0 clamp(2.5rem, 7vw, 5rem);
  border-bottom: 1px solid var(--border);
}

.hero-content {
  width: min(100%, 50rem);
}

.homepage-section {
  padding: clamp(2.5rem, 6vw, 4rem) 0;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.article-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

@media (max-width: 1100px) {
  .docs-shell {
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  }

  [data-page-type="home"] .docs-shell {
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  }

  .article-aside {
    grid-column: 2;
    grid-row: 2;
    position: static;
    max-height: none;
  }
}

@media (max-width: 1000px) {
  .header-inner {
    flex-wrap: wrap;
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }

  .header-search {
    order: 3;
    flex-basis: 100%;
    max-width: none;
    margin: 0;
  }

  .site-header {
    padding-bottom: var(--space-2);
  }
}

@media (max-width: 850px) {
  .header-inner {
    gap: var(--space-3);
  }

  .docs-shell {
    display: block;
    padding-top: var(--space-6);
  }

  .docs-sidebar {
    display: none;
  }

  .mobile-sidebar-panel {
    position: fixed;
    z-index: 40;
    inset: 0 auto 0 0;
    display: block;
    width: min(22rem, calc(100vw - 2.5rem));
    padding: calc(var(--header-height) + var(--space-5)) var(--space-5) var(--space-6);
    overflow-y: auto;
    background: var(--surface);
    box-shadow: var(--shadow-md);
    transform: translateX(-105%);
    transition: transform 180ms ease;
  }

  .no-js .mobile-menu-button,
  .no-js .drawer-close {
    display: none;
  }

  .no-js .mobile-sidebar-panel {
    position: static;
    width: min(100% - (2 * var(--page-gutter)), var(--content-max));
    margin: 0 auto;
    padding: var(--space-5) 0 0;
    overflow: visible;
    background: transparent;
    box-shadow: none;
    transform: none;
  }

  .no-js .mobile-drawer-header {
    margin-bottom: var(--space-3);
  }

  body.is-drawer-open .mobile-sidebar-panel {
    transform: translateX(0);
  }

  body.is-drawer-open .drawer-backdrop {
    position: fixed;
    z-index: 30;
    inset: 0;
    display: block;
    border: 0;
    background: rgba(12, 18, 26, 0.55);
  }

  .article-aside {
    margin-top: var(--space-10);
  }

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

@media (max-width: 650px) {
  .header-actions {
    flex-basis: 100%;
    justify-content: flex-start;
    margin-left: 0;
  }
}

@media (max-width: 560px) {
  :root {
    --page-gutter: 0.625rem;
  }

  .brand-mark {
    height: 2.6rem;
    max-width: 12.5rem;
  }

  .header-actions {
    flex-wrap: wrap;
  }

  .card-grid,
  .article-card-grid {
    grid-template-columns: 1fr;
  }
}