/* =============================================================================
   App Shell - Sidebar Layout (Linear-style)
   ============================================================================= */

.app-shell {
  display: flex;
  min-height: 100vh;
  background: var(--color-white);
}

/* Sidebar */
.app-sidebar {
  width: 260px;
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  background: #F4F4F4;
  border-right: 1px solid #E5E5E5;
  display: flex;
  flex-direction: column;
  z-index: var(--z-fixed);
  transition: width var(--transition-normal), transform var(--transition-normal);
}

.app-sidebar--collapsed {
  width: 64px;
}

.app-sidebar--collapsed .sidebar-label,
.app-sidebar--collapsed .sidebar-search,
.app-sidebar--collapsed .sidebar-section-title,
.app-sidebar--collapsed .sidebar-sites-list,
.app-sidebar--collapsed .sidebar-user-info {
  display: none;
}

.app-sidebar--collapsed .sidebar-header {
  justify-content: center;
  padding: var(--spacing-3) var(--spacing-2);
}

.app-sidebar--collapsed .sidebar-brand {
  display: none;
}

.app-sidebar--collapsed .sidebar-nav-item {
  justify-content: center;
  padding: var(--spacing-2);
}

.app-sidebar--collapsed .sidebar-nav-item i {
  margin-right: 0;
}

.app-sidebar--collapsed .sidebar-user {
  justify-content: center;
  padding: var(--spacing-3) var(--spacing-2);
}

/* Main Content Area */
.app-main {
  flex: 1;
  margin-left: 260px;
  min-height: 100vh;
  transition: margin-left var(--transition-normal);
}

.app-sidebar--collapsed ~ .app-main,
.app-shell--collapsed .app-main {
  margin-left: 64px;
}

/* Sidebar Header */
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-3) var(--spacing-3);
  border-bottom: 1px solid #E5E5E5;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  text-decoration: none;
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
}

.sidebar-brand:hover {
  color: var(--text-primary);
}

.sidebar-brand-icon {
  width: 24px;
  height: 24px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.sidebar-toggle {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-primary);
}

/* Sidebar Search */
.sidebar-search {
  padding: var(--spacing-3);
}

.sidebar-search-wrapper {
  position: relative;
}

.sidebar-search-input {
  width: 100%;
  padding: var(--spacing-2) var(--spacing-3);
  padding-left: 2.25rem;
  background: var(--color-white);
  border: 1px solid #E5E5E5;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.sidebar-search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.sidebar-search-input::placeholder {
  color: var(--text-muted);
}

.sidebar-search-icon {
  position: absolute;
  left: var(--spacing-2);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: var(--font-size-sm);
  pointer-events: none;
}

/* Sidebar Navigation */
.sidebar-nav {
  padding: var(--spacing-2) var(--spacing-2);
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-3);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  margin-bottom: 2px;
}

.sidebar-nav-item:hover {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-primary);
}

.sidebar-nav-item.active {
  background: rgba(0, 0, 0, 0.08);
  color: var(--text-primary);
}

.sidebar-nav-item i {
  width: 16px;
  text-align: center;
  font-size: var(--font-size-sm);
}

.sidebar-label {
  flex: 1;
}

/* Sidebar Section */
.sidebar-section {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border-top: 1px solid #E5E5E5;
}

.sidebar-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-3) var(--spacing-3) var(--spacing-2);
}

.sidebar-section-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
}

.sidebar-section-action {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.sidebar-section-action:hover {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-primary);
}

/* Sidebar Sites List */
.sidebar-sites-list {
  flex: 1;
  overflow-y: auto;
  padding: 0 var(--spacing-2) var(--spacing-2);
}

.sidebar-site-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-3);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  margin-bottom: 2px;
}

.sidebar-site-item:hover {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-primary);
}

.sidebar-site-item.active {
  background: rgba(0, 0, 0, 0.08);
  color: var(--text-primary);
}

.sidebar-site-status {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.sidebar-site-status--published {
  background: var(--color-success);
}

.sidebar-site-status--draft {
  background: var(--color-gray-muted);
}

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

.sidebar-sites-empty {
  padding: var(--spacing-3);
  text-align: center;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

.sidebar-view-all {
  display: block;
  padding: var(--spacing-2) var(--spacing-3);
  color: var(--color-primary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-align: center;
  transition: color var(--transition-fast);
}

.sidebar-view-all:hover {
  color: var(--color-primary-hover);
}

/* Sidebar User Area */
.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-3);
  border-top: 1px solid #E5E5E5;
  background: rgba(0, 0, 0, 0.02);
}

.sidebar-user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  flex-shrink: 0;
}

.sidebar-user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-user-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-email {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-menu {
  position: relative;
}

.sidebar-user-menu-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sidebar-user-menu-btn:hover {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-primary);
}

/* User menu dropdown should appear above */
.sidebar-user-menu .dropdown-menu {
  bottom: 100%;
  top: auto;
  margin-bottom: var(--spacing-2);
}

/* Mobile Sidebar */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-fixed) - 1);
}

.sidebar-overlay.active {
  display: block;
}

.mobile-menu-btn {
  display: none;
  position: fixed;
  top: var(--spacing-3);
  left: var(--spacing-3);
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  z-index: calc(var(--z-fixed) - 2);
  box-shadow: var(--shadow-sm);
}

/* Responsive Sidebar */
@media (max-width: 768px) {
  .app-sidebar {
    transform: translateX(-100%);
    width: 280px;
  }

  .app-sidebar.open {
    transform: translateX(0);
  }

  .app-main {
    margin-left: 0;
  }

  .app-shell--collapsed .app-main {
    margin-left: 0;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .app-main {
    padding-top: 60px;
  }
}