/**
 * Accessibility-specific styles for SimulateAI
 * Ensures compliance with WCAG 2.1 guidelines
 */

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --text-color: #000000;
    --background-color: #ffffff;
    --primary-color: #0000ff;
    --border-color: #000000;
  }

  .card,
  .panel,
  .button {
    border: 2px solid var(--border-color) !important;
  }

  .text-muted {
    color: var(--text-color) !important;
  }
}

/* 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;
  }

  .animated,
  .fade,
  .slide {
    animation: none !important;
    transition: none !important;
  }
}

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

.sr-only-focusable:active,
.sr-only-focusable:focus {
  position: static !important;
  width: auto !important;
  height: auto !important;
  margin: 0 !important;
  overflow: visible !important;
  clip: auto !important;
  white-space: normal !important;
}

/* Skip links */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-color);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: 0 0 4px 4px;
  z-index: 1000;
  font-weight: 500;
}

.skip-link:focus {
  top: 0;
}

/* Focus indicators */
*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Enhanced focus for interactive elements */
button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus,
[tabindex]:focus {
  outline: 3px solid var(--primary-color);
  outline-offset: 2px;
  box-shadow: 0 0 0 1px rgba(0, 122, 204, 0.2);
}

/* Focus within containers */
.simulation-container:focus-within,
.panel:focus-within,
.card:focus-within {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(0, 122, 204, 0.1);
}

/* Keyboard navigation helpers */
.keyboard-user *:focus {
  outline: 3px solid var(--primary-color) !important;
  outline-offset: 2px !important;
}

/* Remove focus for mouse users */
.mouse-user *:focus {
  outline: none;
}

/* Enhanced button styles for accessibility */
button[disabled],
input[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* Loading states with accessible text */
.loading::after {
  content: ' (Loading...)';
  position: absolute;
  left: -9999px;
}

/* Error states */
.error {
  border-color: #dc3545 !important;
  background-color: #f8d7da;
}

.error-message {
  color: #721c24;
  background-color: #f8d7da;
  border: 1px solid #f5c6cb;
  padding: 0.75rem 1.25rem;
  margin-bottom: 1rem;
  border-radius: 0.25rem;
}

/* Success states */
.success {
  border-color: #28a745 !important;
  background-color: #d4edda;
}

.success-message {
  color: #155724;
  background-color: #d4edda;
  border: 1px solid #c3e6cb;
  padding: 0.75rem 1.25rem;
  margin-bottom: 1rem;
  border-radius: 0.25rem;
}

/* Warning states */
.warning {
  border-color: #ffc107 !important;
  background-color: #fff3cd;
}

.warning-message {
  color: #856404;
  background-color: #fff3cd;
  border: 1px solid #ffeaa7;
  padding: 0.75rem 1.25rem;
  margin-bottom: 1rem;
  border-radius: 0.25rem;
}

/* Large text mode support */
@media (min-resolution: 2dppx) {
  body {
    font-size: 1.1rem;
  }

  .btn,
  button {
    min-height: 44px;
    min-width: 44px;
  }
}

/* Touch target improvements */
@media (pointer: coarse) {
  button,
  .btn,
  a,
  input,
  select {
    min-height: 44px;
    min-width: 44px;
    padding: 12px 16px;
  }

  .slider-handle {
    min-width: 44px;
    min-height: 44px;
  }
}

/* Language and direction support */
[dir='rtl'] {
  text-align: right;
}

[dir='rtl'] .panel-header {
  text-align: right;
}

[dir='rtl'] .breadcrumb {
  direction: rtl;
}

/* Custom scrollbars for better visibility */
::-webkit-scrollbar {
  width: 16px;
  height: 16px;
}

::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 8px;
}

::-webkit-scrollbar-thumb {
  background: #888;
  border-radius: 8px;
  border: 2px solid #f1f1f1;
}

::-webkit-scrollbar-thumb:hover {
  background: #555;
}

/* Print styles */
@media print {
  .no-print {
    display: none !important;
  }

  .simulation-container {
    break-inside: avoid;
  }

  a[href^='http']:after {
    content: ' (' attr(href) ')';
  }
}

/* Reduced data mode */
@media (prefers-reduced-data: reduce) {
  * {
    background-image: none !important;
  }

  .thumbnail,
  .hero-image,
  .background-image {
    display: none;
  }
}

/* Accessibility announcements */
.aria-live-region {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Custom focus rings for different elements */
.simulation-card:focus {
  outline: 3px solid var(--primary-color);
  outline-offset: 4px;
}

.nav-link:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  background-color: rgba(0, 122, 204, 0.1);
}

/* Enhanced contrast for links */
a {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 2px;
}

a:hover {
  text-decoration-thickness: 3px;
}

/* Better spacing for screen readers */
.landmark {
  margin-bottom: 1rem;
}

/* Ensure minimum contrast ratios */
.text-light-gray {
  color: #767676; /* 4.5:1 contrast ratio on white */
}

.text-medium-gray {
  color: #595959; /* 7:1 contrast ratio on white */
}

/* Status indicators */
.status-indicator {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-right: 8px;
}

.status-active {
  background-color: #28a745;
}

.status-inactive {
  background-color: #6c757d;
}

.status-error {
  background-color: #dc3545;
}

.status-warning {
  background-color: #ffc107;
}