.app-shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr) 220px;
  grid-template-rows: auto 1fr;
  grid-template-areas:
    "topbar topbar topbar"
    "sidebar content toc";
  min-height: 100vh;
}

.nav-toggle-checkbox {
  display: none;
}

.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background-color: var(--surface);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
}

.brand-logo {
  height: 1.5rem;
  display: block;
}

.topbar-controls {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.lang-switcher a {
  margin-inline-end: 0.5rem;
  text-decoration: none;
}

.lang-switcher a[aria-current="page"] {
  color: var(--text);
  font-weight: 600;
  text-decoration: underline;
}

.logout-link {
  text-decoration: none;
}

.theme-select {
  background-color: var(--ink);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.35rem 0.5rem;
  font-family: inherit;
}

.sidebar {
  grid-area: sidebar;
  border-right: 1px solid var(--border);
  padding: 1.5rem 1rem;
  overflow-y: auto;
}

.sidebar ul {
  list-style: none;
  margin: 0;
  padding-left: 0;
}

.sidebar ul ul {
  padding-left: 1rem;
}

.sidebar li {
  margin: 0.15rem 0;
}

.sidebar a,
.sidebar .nav-section-label {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
}

.sidebar .nav-section-label {
  color: var(--text-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sidebar a[aria-current="page"] {
  background-color: var(--ink);
  color: var(--accent);
  font-weight: 600;
}

.content {
  grid-area: content;
  padding: 2rem;
  max-width: 70ch;
}

.fallback-notice {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
}

.doc-body img {
  max-width: 100%;
  height: auto;
}

.doc-body pre,
.doc-body table {
  overflow-x: auto;
  display: block;
}

.doc-body table {
  width: 100%;
  border-collapse: collapse;
}

.doc-body th,
.doc-body td {
  border: 1px solid var(--border);
  padding: 0.4rem 0.6rem;
}

.doc-body pre {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}

.doc-body pre,
.doc-body code {
  font-family: "JetBrains Mono", monospace;
}

.doc-body .admonition {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin: 1.25rem 0;
}

.doc-body .admonition-title {
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin: 0 0 0.5rem;
}

.doc-body .admonition > :last-child {
  margin-bottom: 0;
}

.doc-body .admonition.warning,
.doc-body .admonition.caution,
.doc-body .admonition.danger {
  border-left-color: #B23A3A;
}

.doc-body .admonition.warning > .admonition-title,
.doc-body .admonition.caution > .admonition-title,
.doc-body .admonition.danger > .admonition-title {
  color: #B23A3A;
}

.doc-body .admonition.tip,
.doc-body .admonition.success {
  border-left-color: #3E8E5A;
}

.doc-body .admonition.tip > .admonition-title,
.doc-body .admonition.success > .admonition-title {
  color: #3E8E5A;
}

.page-toc {
  grid-area: toc;
  padding: 2rem 1rem;
  font-size: 0.9rem;
}

.page-toc-label {
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.page-toc ul {
  list-style: none;
  padding-left: 0.75rem;
}

.nav-toggle-label {
  display: none;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.hamburger-icon,
.hamburger-icon::before,
.hamburger-icon::after {
  content: "";
  display: block;
  width: 1.25rem;
  height: 2px;
  background-color: var(--text);
}

.hamburger-icon {
  position: relative;
}

.hamburger-icon::before {
  position: absolute;
  top: -6px;
}

.hamburger-icon::after {
  position: absolute;
  top: 6px;
}

.error-shell {
  padding: 3rem 1.5rem;
  max-width: 40rem;
  margin: 0 auto;
  text-align: center;
}

@media (max-width: 1024px) {
  .app-shell {
    grid-template-columns: 260px minmax(0, 1fr);
    grid-template-areas:
      "topbar topbar"
      "sidebar content";
  }
  .page-toc {
    display: none;
  }
}

@media (max-width: 768px) {
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-areas:
      "topbar"
      "content";
  }
  .nav-toggle-label {
    display: inline-flex;
  }
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 80%;
    max-width: 320px;
    background-color: var(--ink);
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    z-index: 20;
  }
  .nav-toggle-checkbox:checked ~ .sidebar {
    transform: translateX(0);
  }
  .topbar-controls {
    gap: 0.75rem;
  }
}