.admin-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  min-height: 100vh;
  transition: grid-template-columns 0.25s ease;
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: var(--border-thin);
  background: var(--color-surface);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  z-index: var(--z-sidebar);
  overflow-y: auto;
  overflow-x: hidden;
  transition: width 0.25s ease, padding 0.25s ease;
}

.brand {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.nav-list {
  display: grid;
  gap: var(--space-1);
}

.nav-list a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--border-radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-list a:hover {
  color: var(--color-text);
  background: var(--color-accent-subtle);
}

.nav-list a.active {
  color: var(--color-text);
  background: var(--color-accent-subtle);
  font-weight: var(--weight-semibold);
}

.nav-list a svg,
.nav-list a .nav-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  opacity: 0.6;
}

.nav-list a.active svg,
.nav-list a.active .nav-icon {
  opacity: 1;
}

.sidebar-footer {
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: var(--border-thin);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* Sidebar collapse toggle */
.sidebar-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 32px;
  border: var(--border-thin);
  border-radius: 999px;
  background: transparent;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
  gap: var(--space-2);
}

.sidebar-toggle:hover {
  color: var(--color-text);
  background: var(--color-accent-subtle);
  border-color: var(--color-border-focus);
}

.sidebar-toggle svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.sidebar-toggle .toggle-label {
  transition: opacity 0.15s ease;
}

/* Collapsed sidebar */
.admin-shell.sidebar-collapsed {
  grid-template-columns: var(--sidebar-width-collapsed) minmax(0, 1fr);
}

.admin-shell.sidebar-collapsed .sidebar {
  padding: var(--space-3);
  align-items: center;
}

.admin-shell.sidebar-collapsed .brand {
  justify-content: center;
  margin-bottom: var(--space-4);
}

.admin-shell.sidebar-collapsed .brand-text {
  display: none;
}

.admin-shell.sidebar-collapsed .nav-list a {
  justify-content: center;
  padding: var(--space-2);
}

.admin-shell.sidebar-collapsed .nav-label {
  display: none;
}

.admin-shell.sidebar-collapsed .sidebar-footer .button {
  padding: 0;
  min-height: 32px;
  min-width: 32px;
  justify-content: center;
}

.admin-shell.sidebar-collapsed .sidebar-footer .btn-label {
  display: none;
}

.admin-shell.sidebar-collapsed .sidebar-toggle .toggle-label {
  display: none;
}

.admin-shell.sidebar-collapsed .sidebar-toggle svg {
  transform: rotate(180deg);
}

/* Main content */
.admin-main {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.admin-header {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  border-bottom: var(--border-thin);
  padding: 0 var(--space-4);
  background: var(--color-surface);
  position: sticky;
  top: 0;
  z-index: var(--z-header);
}

.admin-header h1 {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  white-space: nowrap;
  flex-shrink: 0;
}

.header-list {
  flex: 1;
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  scrollbar-width: thin;
  padding: var(--space-2) 0;
  min-width: 0;
}

.header-list::-webkit-scrollbar {
  height: 4px;
}

.header-list::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 2px;
}

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

.admin-content {
  flex: 1;
  overflow: auto;
  padding: var(--space-4);
  animation: fadeIn var(--transition-slow) ease;
}

/* Editor scroll-snap layout */
.editor-scroll-container {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  height: calc(100vh - var(--header-height) - var(--space-4) * 2);
  scrollbar-width: none;          /* Firefox */
  -ms-overflow-style: none;       /* IE/Edge */
}

.editor-scroll-container::-webkit-scrollbar {
  display: none;                  /* Chrome/Safari */
}

.editor-panel {
  min-width: 100%;
  flex-shrink: 0;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.editor-panel--main {
  display: grid;
  grid-template-columns: minmax(var(--col-builder-width), 1fr);
  gap: var(--space-4);
  max-width: var(--max-content-width);
  padding-right: var(--space-4);
}

.editor-panel--main.builder-only {
  grid-template-columns: 1fr;
  max-width: 680px;
  margin: 0 auto;
}

/* CSV builder: side-by-side builder + preview, no scroll-snap */
.csv-editor-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  height: calc(100vh - var(--header-height) - var(--space-4) * 2);
}

.editor-panel--preview {
  display: flex;
}

.editor-col {
  height: 100%;
  overflow-y: auto;
  border: var(--border-thin);
  border-top: 3px solid var(--color-border);
  border-radius: 20px;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  scrollbar-width: thin;
  position: relative;
}

.editor-col.chat-col {
  border-top-color: var(--col-chat-accent);
}

.editor-col.builder-col {
  border-top-color: var(--col-builder-accent);
}

.editor-col.preview-col {
  border-top-color: var(--col-preview-accent);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  width: 100%;
}

.editor-col::-webkit-scrollbar {
  width: 4px;
}

.editor-col::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 2px;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(8px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Mobile */
@media (max-width: 760px) {
  .admin-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: relative;
    height: auto;
    border-right: 0;
    border-bottom: var(--border-thin);
    padding: var(--space-4);
  }

  .brand {
    margin-bottom: var(--space-3);
  }

  .nav-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
  }

  .sidebar-toggle {
    display: none;
  }

  .admin-shell.sidebar-collapsed {
    grid-template-columns: 1fr;
  }

  .admin-header {
    position: relative;
    flex-wrap: wrap;
  }

  .header-list {
    order: 3;
    flex-basis: 100%;
  }

  .admin-content {
    padding: var(--space-3);
  }

  .editor-panel--main {
    grid-template-columns: 1fr !important;
  }

  .editor-scroll-container {
    height: auto;
  }

  .editor-col {
    height: auto;
    max-height: 80vh;
  }
}

/* ========================================
   Org Switcher
   ======================================== */

#org-switcher {
  margin-bottom: var(--space-4);
}

.org-switcher {
  position: relative;
}

.org-switcher-button {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: var(--border-thin);
  border-radius: var(--border-radius-sm);
  background: var(--color-accent-subtle);
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  cursor: pointer;
  transition: background var(--transition-fast);
  text-align: left;
}

.org-switcher-button:hover {
  background: var(--color-surface-2, var(--color-accent-subtle));
}

.org-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: var(--color-text);
  color: var(--color-surface);
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}

.org-avatar-sm {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background: var(--color-text-muted);
  color: var(--color-surface);
  font-size: 10px;
  font-weight: 700;
  flex-shrink: 0;
}

.org-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.org-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--color-surface);
  border: var(--border-thin);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-md, 0 4px 12px rgba(0,0,0,0.1));
  z-index: calc(var(--z-sidebar) + 1);
  max-height: 300px;
  overflow-y: auto;
}

.org-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: none;
  background: transparent;
  color: var(--color-text);
  font-size: var(--text-sm);
  cursor: pointer;
  text-align: left;
  transition: background var(--transition-fast);
}

.org-dropdown-item:hover {
  background: var(--color-accent-subtle);
}

.org-dropdown-item.active {
  background: var(--color-accent-subtle);
  font-weight: var(--weight-semibold);
}

.org-dropdown-divider {
  height: 1px;
  background: var(--color-border, var(--border));
  margin: var(--space-1) 0;
}

/* Collapsed sidebar hides org switcher text */
.sidebar-collapsed #org-switcher .org-name,
.sidebar-collapsed #org-switcher svg[width="12"] {
  display: none;
}

.sidebar-collapsed .org-switcher-button {
  justify-content: center;
  padding: var(--space-2);
}

.sidebar-collapsed .org-dropdown {
  left: calc(100% + 4px);
  top: 0;
  width: 220px;
  right: auto;
}