/* ==========================================================================
   Accessibility Features - Peak Learning AQ Profile®
   WCAG 2.1 AA Compliance
   ========================================================================== */

/* Skip to main content link for screen readers */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: #1e90ff;
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: 4px;
  z-index: 10000;
  transition: top 0.3s ease;
}

.skip-link:focus {
  top: 6px;
}

/* Focus indicators */
.focus-visible {
  outline: 2px solid #1e90ff;
  outline-offset: 2px;
  border-radius: 4px;
}

/* Enhanced focus for interactive elements */
button:focus,
input:focus,
select:focus,
textarea:focus,
a:focus,
[tabindex]:focus {
  outline: 2px solid #1e90ff;
  outline-offset: 2px;
  box-shadow: 0 0 8px rgba(30, 144, 255, 0.3);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .question-block {
    border: 2px solid #ffffff;
  }

  .slider {
    border: 2px solid #ffffff;
  }

  .btn {
    border: 2px solid #ffffff;
  }
}

/* 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;
  }

  .assessment-progress-bar::before {
    animation: none !important;
  }

  .assessment-complete {
    animation: none !important;
  }
}

/* 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: 0;
}

/* Color accessibility - ensure sufficient contrast */
.text-primary {
  color: #ffffff; /* High contrast against dark backgrounds */
}

.text-secondary {
  color: rgba(255, 255, 255, 0.8);
}

.text-muted {
  color: rgba(255, 255, 255, 0.6);
}

/* ARIA landmarks */
[role="main"] {
  outline: none;
}

[role="navigation"] {
  outline: none;
}

[role="complementary"] {
  outline: none;
}

[role="contentinfo"] {
  outline: none;
}

/* Enhanced form accessibility */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: #ffffff;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid rgba(30, 144, 255, 0.3);
  border-radius: 8px;
  background: rgba(58, 61, 74, 0.8);
  color: #ffffff;
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: #1e90ff;
  box-shadow: 0 0 8px rgba(30, 144, 255, 0.3);
  outline: none;
}

.form-input[aria-invalid="true"],
.form-select[aria-invalid="true"],
.form-textarea[aria-invalid="true"] {
  border-color: #ef4444;
  box-shadow: 0 0 8px rgba(239, 68, 68, 0.3);
}

.form-error {
  color: #ef4444;
  font-size: 0.875rem;
  margin-top: 0.25rem;
  display: block;
}

.form-description {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 0.25rem;
  display: block;
}

/* Button accessibility */
.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px; /* Minimum touch target size */
  min-width: 44px;
}

.btn:focus {
  outline: 2px solid #1e90ff;
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: linear-gradient(135deg, #1e90ff, #4169e1);
  color: #ffffff;
}

.btn-secondary {
  background: rgba(58, 61, 74, 0.8);
  color: #ffffff;
  border: 1px solid rgba(30, 144, 255, 0.3);
}

/* Link accessibility */
a {
  color: #1e90ff;
  text-decoration: underline;
  transition: color 0.2s ease;
}

a:hover,
a:focus {
  color: #4169e1;
  text-decoration: underline;
}

a:focus {
  outline: 2px solid #1e90ff;
  outline-offset: 2px;
  border-radius: 2px;
}

/* Assessment-specific accessibility */
.question-block {
  position: relative;
}

.question-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

/* Slider accessibility */
.slider-container {
  position: relative;
  margin: 2rem 0;
}

.slider {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: rgba(58, 61, 74, 0.6);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1e90ff, #4169e1);
  cursor: pointer;
  border: 3px solid #ffffff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1e90ff, #4169e1);
  cursor: pointer;
  border: 3px solid #ffffff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.slider:focus {
  outline: 2px solid #1e90ff;
  outline-offset: 2px;
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 1rem;
  padding: 0 8px;
}

.slider-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
}

/* Progress bar accessibility */
.progress-bar {
  height: 8px;
  background: rgba(58, 61, 74, 0.6);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #1e90ff, #4169e1);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.progress-bar[role="progressbar"] {
  position: relative;
}

.progress-bar[role="progressbar"]::before {
  content: attr(aria-valuenow) "%";
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.75rem;
  font-weight: 600;
  color: #ffffff;
  background: rgba(0, 0, 0, 0.7);
  padding: 2px 6px;
  border-radius: 4px;
}

/* Modal accessibility */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
}

.modal {
  background: linear-gradient(135deg, rgba(26, 26, 46, 0.95), rgba(22, 33, 62, 0.95));
  border-radius: 16px;
  padding: 2rem;
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  border: 1px solid rgba(30, 144, 255, 0.3);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.modal:focus {
  outline: 2px solid #1e90ff;
  outline-offset: 2px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffffff;
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.modal-close:hover,
.modal-close:focus {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
}

/* Table accessibility */
.table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

.table th,
.table td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid rgba(30, 144, 255, 0.2);
}

.table th {
  background: rgba(30, 144, 255, 0.1);
  font-weight: 600;
  color: #ffffff;
  border-bottom: 2px solid rgba(30, 144, 255, 0.3);
}

.table caption {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 0.5rem;
  text-align: left;
  font-style: italic;
}

/* Alert accessibility */
.alert {
  padding: 1rem;
  border-radius: 8px;
  margin: 1rem 0;
  border-left: 4px solid;
}

.alert-success {
  background: rgba(34, 197, 94, 0.1);
  border-left-color: #22c55e;
  color: #ffffff;
}

.alert-warning {
  background: rgba(251, 146, 60, 0.1);
  border-left-color: #fb923c;
  color: #ffffff;
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border-left-color: #ef4444;
  color: #ffffff;
}

.alert-info {
  background: rgba(30, 144, 255, 0.1);
  border-left-color: #1e90ff;
  color: #ffffff;
}

.alert[role="alert"] {
  position: relative;
}

.alert[role="alert"]::before {
  content: "Alert: ";
  position: absolute;
  left: -9999px;
}

/* Keyboard navigation indicators */
.keyboard-user *:focus {
  outline: 2px solid #1e90ff !important;
  outline-offset: 2px !important;
}

/* Touch-friendly targets for mobile */
@media (max-width: 768px) {
  .btn {
    min-height: 48px;
    min-width: 48px;
    padding: 12px 24px;
  }

  .slider::-webkit-slider-thumb,
  .slider::-moz-range-thumb {
    width: 28px;
    height: 28px;
  }

  .nav-item {
    min-height: 44px;
    padding: 12px 16px;
  }
}

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

  .question-block {
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .btn {
    break-inside: avoid;
  }
}