.appLayout {
  --navigation-inset: 12px;
  /* SideNav's leading gutter (12) plus half the shared icon size (20). */
  --navigation-icon-center: calc(var(--navigation-inset) + 1.375rem * var(--s2-scale, 1));
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  height: 100dvh;
  overflow: hidden;
  color: var(--text);
  background: var(--bg);
}

.sidebar {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-inline-end: 1px solid var(--border);
  background: var(--social-bg);
}

.sidebarBrand,
.topbar {
  display: flex;
  align-items: center;
  box-sizing: border-box;
  height: 64px;
  flex-shrink: 0;
  padding: 0 24px;
  border-bottom: 1px solid var(--border);
  color: var(--text-h);
  font-size: 16px;
  font-weight: 600;
}

.sidebarNavigation {
  flex: 1;
  min-height: 0;
  padding: 16px var(--navigation-inset);
}

.expandedNavigation {
  height: 100%;
}

.topbar {
  gap: 12px;
}

.topbarActions {
  margin-inline-start: auto;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.appLayout.isCollapsed {
  /* Include the sidebar border so both modes share the same icon center. */
  grid-template-columns: calc(2 * var(--navigation-icon-center) + 1px) minmax(0, 1fr);
}

.isCollapsed .sidebarBrand {
  justify-content: center;
  padding-inline: 0;
}

.isCollapsed .sidebarNavigation {
  overflow-y: auto;
}

.iconNavigation {
  display: flex;
  flex-direction: column;
  align-items: center;
  /* Match SideNav's row spacing (space(6)). */
  gap: 0.375rem;
}

.iconNavigationLink,
.iconNavigationGroup {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 40px;
  /* Match SideNav's 32-unit row height, including Spectrum's touch scale. */
  height: calc(2rem * var(--s2-scale, 1));
  flex-shrink: 0;
  border-radius: 8px;
  color: var(--text);
}

.iconNavigationLink:hover,
.iconNavigationLink[aria-current="page"],
.iconNavigationGroup.isActive {
  background: var(--border);
  color: var(--text-h);
}

.iconNavigationLink:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.contentLayout {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  min-width: 0;
  min-height: 0;
}

.skipLink {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 10;
  padding: 8px 16px;
  background: var(--bg);
  color: var(--accent);
  transform: translateY(calc(-100% - 16px));

  &:focus {
    transform: translateY(0);
  }
}

@media (max-width: 640px) {
  .appLayout,
  .appLayout.isCollapsed {
    --navigation-inset: 8px;
    grid-template-columns: minmax(0, 1fr);
  }

  .sidebar,
  .desktopMenuToggle {
    display: none;
  }

  .sidebarBrand,
  .topbar {
    padding-inline: 12px;
  }
}

.pageContent {
  /* Keep absolutely positioned accessibility helpers inside this scroll area. */
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow: auto;
  text-align: center;
}

.pageContent > * {
  flex-shrink: 0;
}