/**
 * Layout - Структура страницы
 * Sidebar, Header, Main content
 */

/* === App Layout === */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* === Sidebar === */
.sidebar {
  width: 260px;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: var(--z-fixed);
  transition: width 0.2s ease, transform var(--transition-base);
}

.sidebar-header {
  padding: var(--spacing-4) var(--spacing-4);
  border-bottom: 1px solid var(--sidebar-border);
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.sidebar-header-text {
  flex: 1;
  min-width: 0;
}

.sidebar-toggle {
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.sidebar-toggle:hover {
  background: var(--sidebar-item-hover);
  color: var(--text-primary);
}

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

.sidebar.collapsed .sidebar-header-text {
  display: none;
}

.sidebar.collapsed .sidebar-header {
  justify-content: center;
  padding: var(--spacing-4) var(--spacing-2);
}

.sidebar-logo {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-secondary-500));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: var(--text-lg);
}

.sidebar-title {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--text-primary);
}

.sidebar-subtitle {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-4) var(--spacing-2);
}

.nav-section {
  margin-bottom: var(--spacing-6);
}

.nav-section-title {
  padding: var(--spacing-2) var(--spacing-3);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-2) var(--spacing-3);
  margin: var(--spacing-1) 0;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
}

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

.nav-item.active {
  background: var(--sidebar-item-active);
  color: var(--color-primary-400);
}

.nav-item-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.nav-item-text {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.nav-item-badge {
  margin-left: auto;
  padding: 2px 8px;
  font-size: var(--text-xs);
  background: var(--color-primary-900);
  color: var(--color-primary-300);
  border-radius: var(--radius-full);
}

/* Sidebar footer */
.sidebar-footer {
  padding: var(--spacing-4);
  border-top: 1px solid var(--sidebar-border);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.sidebar-user:hover {
  background: var(--sidebar-item-hover);
}

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

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

.sidebar-user-role {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* === Main Content === */
.main-content {
  flex: 1;
  margin-left: 260px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left 0.2s ease;
}

/* Header */
.main-header {
  padding: var(--spacing-4) var(--spacing-6);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.header-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin: 0;
}

.header-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.header-breadcrumb a {
  color: var(--text-secondary);
}

.header-breadcrumb a:hover {
  color: var(--text-primary);
}

.header-breadcrumb-separator {
  color: var(--text-muted);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

/* Mobile menu toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  padding: var(--spacing-2);
  cursor: pointer;
}

/* === Page Content === */
.page-content {
  flex: 1;
  padding: var(--spacing-6);
  background: var(--bg-primary);
}

/* Page header */
.page-header {
  margin-bottom: var(--spacing-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-4);
  flex-wrap: wrap;
}

.page-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  margin: 0;
}

.page-description {
  color: var(--text-secondary);
  margin-top: var(--spacing-1);
}

.page-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

/* === Grid System === */
.grid {
  display: grid;
  gap: var(--spacing-4);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-cols-4,
  .grid-cols-3,
  .grid-cols-2 {
    grid-template-columns: 1fr;
  }
}

/* === Responsive === */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
}

/* === Theme Toggle === */
.theme-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: var(--spacing-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* === Sidebar Collapse === */
.sidebar.collapsed {
  width: 72px;
}

.sidebar.collapsed .sidebar-title,
.sidebar.collapsed .sidebar-subtitle,
.sidebar.collapsed .nav-section-title,
.sidebar.collapsed .nav-item-text,
.sidebar.collapsed .nav-item-badge,
.sidebar.collapsed .sidebar-user-info {
  display: none;
}

.sidebar.collapsed .nav-item {
  justify-content: center;
  padding: var(--spacing-3);
}

.sidebar.collapsed .sidebar-user {
  justify-content: center;
}

.sidebar.collapsed + .main-content {
  margin-left: 72px;
}

/* === Full Page (Login) === */
.full-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  padding: var(--spacing-4);
}

.full-page-card {
  width: 100%;
  max-width: 400px;
}

/* === Section === */
.section {
  margin-bottom: var(--spacing-8);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-4);
}

.section-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin: 0;
}

/* === Data Table === */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  padding: var(--spacing-3) var(--spacing-4);
  text-align: left;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
  position: sticky;
  top: 0;
}

.data-table td {
  padding: var(--spacing-3) var(--spacing-4);
  border-bottom: 1px solid var(--border-light);
  font-size: var(--text-sm);
}

.data-table tr:hover td {
  background: var(--bg-hover);
}

.data-table-actions {
  display: flex;
  gap: var(--spacing-2);
  justify-content: flex-end;
}

/* === Filter Bar === */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  padding: var(--spacing-4);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-4);
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.filter-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  white-space: nowrap;
}

.search-input {
  min-width: 250px;
}

/* === Pagination === */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-4);
}

.pagination-btn {
  padding: var(--spacing-2) var(--spacing-3);
  font-size: var(--text-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.pagination-btn.active {
  background: var(--color-primary-600);
  border-color: var(--color-primary-600);
  color: white;
}

.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination-info {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin: 0 var(--spacing-4);
}