/* ========================================
   CNESST Landing Pages - Accessibility Styles
   WCAG 2.1 AA Compliant
   ======================================== */

/* ========================================
   Skip Links
   ======================================== */

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary-color);
  color: white;
  padding: var(--spacing-md);
  text-decoration: none;
  z-index: 100;
  font-weight: 600;
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--text-white);
  outline-offset: -3px;
}

/* ========================================
   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;
}

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

/* ========================================
   Focus Styles (Enhanced)
   ======================================== */

*:focus-visible {
  outline: 3px solid var(--primary-color);
  outline-offset: 2px;
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--primary-color);
  outline-offset: 2px;
}

/* ========================================
   ARIA Live Regions
   ======================================== */

[aria-live="polite"],
[aria-live="assertive"] {
  position: relative;
}

.status-message {
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin: var(--spacing-md) 0;
}

.status-message[role="status"] {
  background-color: var(--info-bg-light);
  border: 2px solid var(--info-color);
}

.status-message[role="alert"] {
  background-color: var(--danger-bg);
  border: 2px solid var(--danger-color);
  color: var(--danger-text);
}

/* ========================================
   High Contrast Mode Support
   ======================================== */

@media (prefers-contrast: high) {
  * {
    border-width: 2px;
  }

  .btn {
    border-width: 2px;
  }

  .form-control {
    border-width: 2px;
  }
}

/* ========================================
   Reduced Motion Support
   ======================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms ;
    animation-iteration-count: 1 ;
    transition-duration: 0.01ms ;
    scroll-behavior: auto ;
  }
}

/* ========================================
   Color Contrast Utilities
   ======================================== */

.high-contrast {
  background-color: #000000;
  color: #ffffff;
}

.high-contrast   a {
    color: var(--bg-yellow);
}

.high-contrast   .btn-primary {
    background-color: var(--bg-black);
    color: var(--text-white);
    border: 2px solid var(--text-white);
}

/* ========================================
   Keyboard Navigation Indicators
   ======================================== */

.keyboard-user *:focus {
  outline: 3px solid var(--primary-color);
  outline-offset: 2px;
}

/* ========================================
   Touch Target Size (min 44x44px)
   ======================================== */

button,
input[type="button"],
input[type="submit"],
input[type="reset"],
a.btn,
.btn {
  min-height: 44px;
  min-width: 44px;
}

input[type="radio"],
input[type="checkbox"] {
  /* Custom radio/checkbox labels already meet size requirement */
}

.radio-option label,
.checkbox-option label {
  min-height: 44px;
  display: flex;
  align-items: center;
}

/* ========================================
   Error Messages & Validation
   ======================================== */

.error-summary {
  background-color: var(--danger-bg);
  border: 2px solid var(--danger-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.error-summary h2 {
  color: var(--danger-text);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
}

.error-summary ul {
  margin: 0;
  padding-left: var(--spacing-lg);
  list-style-type: disc;
}

.error-summary li {
  margin-bottom: var(--spacing-sm);
  color: var(--danger-text);
}

.error-summary a {
  color: var(--danger-text);
  text-decoration: underline;
  font-weight: 600;
}

.error-summary a:hover,
.error-summary a:focus {
  color: var(--danger-text-dark);
}

/* ========================================
   ARIA Invalid State
   ======================================== */

[aria-invalid="true"] {
  border-color: var(--danger-color);
}

[aria-invalid="true"]:focus {
  outline-color: var(--danger-color);
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.25);
}

/* ========================================
   Descriptive Text for Inputs
   ======================================== */

.form-description {
  display: block;
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ========================================
   Disabled State Clarity
   ======================================== */

:disabled,
[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
}

button:disabled,
input:disabled,
select:disabled,
textarea:disabled {
  background-color: #e9ecef;
  color: var(--text-secondary);
  border-color: var(--border-color);
}

/* ========================================
   Loading & Progress Indicators
   ======================================== */

.loading-spinner {
  border: 3px solid rgba(0, 0, 0, 0.1);
  border-left-color: var(--primary-color);
  border-radius: 50%;
  width: 24px;
  height: 24px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.loading-text::after {
  content: '...';
  animation: dots 1.5s steps(3, end) infinite;
}

@keyframes dots {
  0%, 20% {
    content: '.';
  }
  40% {
    content: '..';
  }
  60%, 100% {
    content: '...';
  }
}

/* ========================================
   Landmark Roles Enhancement
   ======================================== */

header[role="banner"],
nav[role="navigation"],
main[role="main"],
footer[role="contentinfo"] {
  position: relative;
}

/* ========================================
   Language Support
   ======================================== */

[lang="fr"] {
  font-family: var(--font-family);
}

/* ========================================
   Print Styles for Accessibility
   ======================================== */

@media print {
  .no-print {
    display: none ;
  }

  a[href]::after {
    content: " (" attr(href) ")";
  }

  .skip-link {
    display: none;
  }
}