/**
 * Accessibility Enhancements
 * WCAG 2.1 Level AA Compliance
 */

/* ============================================
   1. SKIP TO CONTENT LINK
   ============================================ */
.skip-to-content {
  position: absolute;
  top: -100px;
  left: 0;
  background-color: var(--color-primary);
  color: var(--text-white);
  padding: var(--spacing-3) var(--spacing-5);
  text-decoration: none;
  font-weight: var(--font-semibold);
  z-index: 10000;
  border-radius: 0 0 var(--radius-md) 0;
  transition: top var(--transition-base);
}

.skip-to-content:focus {
  top: 0;
  outline: 3px solid var(--color-warning);
  outline-offset: 2px;
}

/* ============================================
   2. ENHANCED FOCUS INDICATORS
   ============================================ */

/* Focus-visible for keyboard-only focus */
*:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* Remove default focus outline for mouse users */
*:focus:not(:focus-visible) {
  outline: none;
}

/* Button Focus States */
.btn:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.btn-primary:focus-visible {
  outline-color: var(--color-primary-dark);
}

.btn-danger:focus-visible {
  outline-color: var(--color-danger);
}

.btn-success:focus-visible {
  outline-color: var(--color-success);
}

/* Link Focus States */
a:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Navigation Link Focus */
.nav-item:focus-visible {
  outline: 3px solid var(--color-primary-light);
  outline-offset: -3px;
  background-color: rgba(255, 255, 255, 0.1);
}

/* Sidebar Toggle Focus */
.sidebar-toggle:focus-visible,
.mobile-menu-toggle:focus-visible {
  outline: 3px solid var(--color-primary-light);
  outline-offset: 2px;
}

/* User Menu Focus */
.user-menu-toggle:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  background-color: var(--color-light);
}

/* Notification Button Focus */
.notification-btn:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  background-color: var(--color-light);
}

/* Form Input Focus - Enhanced */
.form-input:focus-visible,
.form-select:focus-visible,
.form-textarea:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 0;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Checkbox and Radio Focus */
.form-check-input:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Card Focus (when interactive) */
.card-hover:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  box-shadow: var(--shadow-lg);
}

/* DataTable Focus */
.dataTables_wrapper .dataTables_filter input:focus-visible,
.dataTables_wrapper .dataTables_length select:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-color: var(--border-focus);
}

/* Modal Close Button Focus */
.modal-close:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  background-color: var(--color-light);
}

/* Tab Focus */
.profile-tab:focus-visible,
.service-tab:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* Filter Button Focus */
.filter-btn:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* ============================================
   3. IMPROVED COLOR CONTRAST
   ============================================ */

/* Update light text color for better contrast */
:root {
  --text-light-accessible: #64748b; /* Improved from #94a3b8 */
  --text-secondary-accessible: #475569; /* Improved from #64748b */
}

/* Apply improved contrast colors */
.text-light,
.form-help,
.service-type,
.service-date {
  color: var(--text-light-accessible);
}

/* Warning badge - improved contrast */
.badge-warning {
  background-color: #fef3c7;
  color: #78350f; /* Darkened from #92400e */
}

/* Secondary text in cards */
.card-header .text-secondary,
.summary-card-label,
.detail-label {
  color: var(--text-secondary-accessible);
}

/* Placeholder text - improved contrast */
.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-light-accessible);
  opacity: 1;
}

/* ============================================
   4. ARIA LIVE REGIONS
   ============================================ */

/* Screen reader only content */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Screen reader only focusable */
.sr-only-focusable:focus,
.sr-only-focusable:active {
  position: static;
  width: auto;
  height: auto;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* Live region for dynamic content */
.aria-live-region {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* ============================================
   5. KEYBOARD NAVIGATION ENHANCEMENTS
   ============================================ */

/* Dropdown keyboard navigation */
.user-dropdown a:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: -3px;
  background-color: var(--color-light);
}

/* Table row keyboard navigation */
.services-table tbody tr:focus-within {
  background-color: var(--color-light);
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

/* Modal focus trap indicator */
.modal.active {
  /* Ensure modal content is keyboard accessible */
}

.modal-dialog:focus {
  outline: none;
}

/* ============================================
   6. REDUCED MOTION SUPPORT
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  /* Keep essential transitions for usability */
  .form-input:focus,
  .form-select:focus,
  .form-textarea:focus,
  .btn:focus {
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
  }
}

/* ============================================
   7. HIGH CONTRAST MODE SUPPORT
   ============================================ */

@media (prefers-contrast: high) {
  /* Enhance borders in high contrast mode */
  .card,
  .form-input,
  .form-select,
  .form-textarea,
  .btn {
    border-width: 2px;
  }
  
  /* Ensure focus indicators are visible */
  *:focus-visible {
    outline-width: 4px;
  }
  
  /* Enhance text contrast */
  body {
    color: #000000;
    background-color: #ffffff;
  }
}

/* Windows High Contrast Mode */
@media (forced-colors: active) {
  /* Ensure focus indicators work in forced colors mode */
  *:focus-visible {
    outline: 3px solid;
  }
  
  /* Ensure buttons have visible borders */
  .btn {
    border: 2px solid;
  }
}

/* ============================================
   8. TOUCH TARGET SIZES (Mobile)
   ============================================ */

@media (max-width: 767px) {
  /* Ensure minimum 44x44px touch targets */
  .btn,
  .nav-item,
  .user-menu-toggle,
  .notification-btn,
  .mobile-menu-toggle,
  .sidebar-toggle {
    min-height: 44px;
    min-width: 44px;
  }
  
  /* Form inputs */
  .form-input,
  .form-select,
  .form-textarea {
    min-height: 44px;
  }
  
  /* Checkbox and radio */
  .form-check-input {
    width: 24px;
    height: 24px;
  }
  
  /* Icon buttons */
  .btn-icon {
    min-width: 44px;
    min-height: 44px;
  }
}

/* ============================================
   9. ERROR IDENTIFICATION
   ============================================ */

/* Error icon for invalid inputs */
.form-input.is-invalid,
.form-select.is-invalid,
.form-textarea.is-invalid {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23ef4444' viewBox='0 0 16 16'%3E%3Cpath d='M8 15A7 7 0 1 1 8 1a7 7 0 0 1 0 14zm0 1A8 8 0 1 0 8 0a8 8 0 0 0 0 16z'/%3E%3Cpath d='M7.002 11a1 1 0 1 1 2 0 1 1 0 0 1-2 0zM7.1 4.995a.905.905 0 1 1 1.8 0l-.35 3.507a.552.552 0 0 1-1.1 0L7.1 4.995z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-3) center;
  padding-right: var(--spacing-10);
}

/* Success icon for valid inputs */
.form-input.is-valid,
.form-select.is-valid,
.form-textarea.is-valid {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2310b981' viewBox='0 0 16 16'%3E%3Cpath d='M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0zm-3.97-3.03a.75.75 0 0 0-1.08.022L7.477 9.417 5.384 7.323a.75.75 0 0 0-1.06 1.06L6.97 11.03a.75.75 0 0 0 1.079-.02l3.992-4.99a.75.75 0 0 0-.01-1.05z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-3) center;
  padding-right: var(--spacing-10);
}

/* Error message styling */
.form-error {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.form-error::before {
  content: '⚠';
  font-size: var(--text-base);
  flex-shrink: 0;
}

/* ============================================
   10. TABLE ACCESSIBILITY
   ============================================ */

/* Ensure table headers are properly styled */
table th {
  font-weight: var(--font-semibold);
}

/* Highlight focused table cells */
table td:focus-within,
table th:focus-within {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

/* ============================================
   11. LOADING STATES ACCESSIBILITY
   ============================================ */

/* Loading spinner with aria-label */
.loading-spinner[aria-label] {
  /* Ensure spinner is announced to screen readers */
}

/* Skeleton screens should have aria-busy */
.skeleton[aria-busy="true"] {
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

@keyframes skeleton-loading {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* ============================================
   12. MODAL ACCESSIBILITY
   ============================================ */

/* Ensure modal backdrop doesn't interfere with focus */
.modal-backdrop {
  pointer-events: none;
}

.modal.active .modal-backdrop {
  pointer-events: auto;
}

/* Modal dialog should trap focus */
.modal.active .modal-dialog {
  /* Focus management handled by JavaScript */
}

/* ============================================
   13. NOTIFICATION ACCESSIBILITY
   ============================================ */

/* Toast notifications should be announced */
.toastify[role="alert"] {
  /* Ensure toasts are announced to screen readers */
}

/* ============================================
   14. LANGUAGE AND DIRECTION
   ============================================ */

/* Support for RTL languages */
[dir="rtl"] .sidebar {
  left: auto;
  right: 0;
}

[dir="rtl"] .main-wrapper {
  margin-left: 0;
  margin-right: 250px;
}

[dir="rtl"] .nav-item.active {
  border-left: none;
  border-right: 3px solid var(--color-primary);
}

/* ============================================
   15. PRINT ACCESSIBILITY
   ============================================ */

@media print {
  /* Hide non-essential elements */
  .sidebar,
  .top-header,
  .mobile-backdrop,
  .notification-btn,
  .user-menu {
    display: none !important;
  }
  
  /* Adjust layout for printing */
  .main-wrapper {
    margin-left: 0;
  }
  
  .main-content {
    padding: 0;
  }
  
  /* Ensure links are visible */
  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
  }
  
  /* Don't show link URLs for navigation */
  .nav-item[href]::after,
  .btn[href]::after {
    content: "";
  }
}