/* ==============================
   RESPONSIVE DESIGN
   ============================== */

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--gray-600);
  cursor: pointer;
}

.mobile-menu-toggle:hover {
  background: var(--gray-100);
}

/* Sidebar Overlay */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
}

/* ==============================
   TABLETS (768px - 1023px)
   ============================== */

@media (max-width: 1023px) {
  .sidebar {
    transform: translateX(-100%);
  }

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

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

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

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

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

  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-bar .form-input,
  .filter-bar .form-select {
    width: 100%;
    min-width: 0;
  }

  .kanban-board {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-content {
    padding: var(--spacing-md);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .header-search {
    max-width: 250px;
  }
}

/* ==============================
   MOBILE (320px - 767px)
   ============================== */

@media (max-width: 767px) {
  .mobile-menu-toggle {
    display: flex;
  }

  .header {
    padding: 0 var(--spacing-md);
    gap: var(--spacing-sm);
  }

  .header-search {
    display: none;
  }

  .header-actions {
    gap: 2px;
  }

  .mini-timer {
    display: none;
  }

  .user-avatar-btn .user-name {
    display: none;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
  }

  .section-header-actions {
    width: 100%;
    flex-wrap: wrap;
  }

  .section-header h1 {
    font-size: var(--font-size-xl);
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .grid-4 {
    grid-template-columns: 1fr;
  }

  .stat-card-value {
    font-size: var(--font-size-xl);
  }

  /* Mobile Tables → Cards */
  .table-container {
    overflow-x: auto;
  }

  .table th,
  .table td {
    white-space: nowrap;
  }

  .filter-bar {
    padding: var(--spacing-sm);
  }

  .kanban-board {
    grid-template-columns: 1fr;
  }

  .modal {
    margin: var(--spacing-md);
    max-height: calc(100vh - 32px);
  }

  .modal-body {
    padding: var(--spacing-md);
  }

  .tabs {
    overflow-x: auto;
    scrollbar-width: none;
  }

  .tabs::-webkit-scrollbar {
    display: none;
  }

  .tab-item {
    padding: var(--spacing-sm) var(--spacing-md);
    white-space: nowrap;
  }

  .pagination {
    gap: 2px;
  }

  .pagination-item {
    min-width: 32px;
    height: 32px;
    font-size: var(--font-size-xs);
  }

  .toast {
    min-width: auto;
    max-width: calc(100vw - 32px);
    margin: 0 var(--spacing-md);
  }

  .toast-container {
    right: 0;
    left: 0;
    align-items: stretch;
  }

  .page-content {
    padding: var(--spacing-md);
  }

  /* Dashboard Mobile */
  .dashboard-widgets {
    grid-template-columns: 1fr;
  }

  .section-header h2 {
    font-size: var(--font-size-lg);
  }

  /* Task Detail Mobile */
  .task-detail-layout {
    grid-template-columns: 1fr;
  }

  /* Profile Mobile */
  .profile-header {
    flex-direction: column;
    text-align: center;
  }

  .profile-header .profile-info {
    align-items: center;
  }

  /* Report Charts Mobile */
  .report-chart {
    min-height: 250px;
  }

  .btn-lg {
    padding: var(--spacing-sm) var(--spacing-md);
  }
}

/* ==============================
   SMALL MOBILE (320px - 480px)
   ============================== */

@media (max-width: 480px) {
  .header {
    padding: 0 var(--spacing-sm);
  }

  .header-btn {
    width: 36px;
    height: 36px;
  }

  .section-header h1 {
    font-size: var(--font-size-lg);
  }

  .card-body {
    padding: var(--spacing-md);
  }

  .card-header {
    padding: var(--spacing-md);
  }

  .stat-card {
    padding: var(--spacing-md);
  }

  .filter-bar .btn {
    width: 100%;
  }

  .view-toggle {
    width: 100%;
  }

  .view-toggle-btn {
    flex: 1;
    text-align: center;
  }
}

/* ==============================
   DARK MODE (optional)
   ============================== */

@media (prefers-color-scheme: dark) {
  :root {
    --gray-50: #1F2937;
    --gray-100: #374151;
    --gray-200: #4B5563;
    --gray-300: #6B7280;
    --gray-400: #9CA3AF;
    --gray-500: #D1D5DB;
    --gray-600: #E5E7EB;
    --gray-700: #F3F4F6;
    --gray-800: #F9FAFB;
    --gray-900: #FFFFFF;
    
    --white: #111827;
    --primary-light: #1E3A5F;
    --success-light: #064E3B;
    --warning-light: #78350F;
    --error-light: #7F1D1D;
  }
}

/* ==============================
   PRINT STYLES
   ============================== */

@media print {
  .sidebar,
  .header,
  .btn,
  .filter-bar,
  .pagination,
  .toast-container,
  .modal-overlay {
    display: none !important;
  }

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

  .page-content {
    padding: 0;
  }

  .card {
    border: none;
    box-shadow: none;
  }

  .table th {
    background: var(--gray-100);
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}