/**
 * ACCESSIBILITY ENHANCEMENTS
 * WCAG 2.1 AA Compliance
 */

/* Skip Links - Allow keyboard users to skip to main content */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--copper-warm);
  color: var(--black-carbon);
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  font-weight: 700;
  z-index: 10000;
  border-radius: 0 0 var(--radius-sm) 0;
  transition: top var(--duration-fast) var(--ease-out);
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--gold-soft);
  outline-offset: 2px;
}

/* Enhanced Focus Indicators */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus,
[tabindex]:focus {
  outline: 3px solid var(--copper-warm);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Focus visible only for keyboard navigation */
a:focus:not(:focus-visible),
button:focus:not(:focus-visible),
input:focus:not(:focus-visible),
select:focus:not(:focus-visible),
textarea: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(--copper-warm);
  outline-offset: 2px;
}

/* Ensure sufficient color contrast */
.text-muted {
  color: var(--beige-muted); /* Adjusted for better contrast */
}

/* 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;
}

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

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --bg-base: #000000;
    --border-medium: rgba(255, 255, 255, 0.4);
  }

  .btn,
  .btn-hero {
    border: 2px solid currentColor;
  }

  a {
    text-decoration: underline;
  }
}

/* Forced Colors Mode (Windows High Contrast) */
@media (forced-colors: active) {
  .btn,
  .btn-hero,
  .card {
    border: 1px solid;
  }

  .hero-overlay {
    background: transparent;
  }
}

/* Keyboard Navigation Indicators */
.nav a:focus,
.menu a:focus {
  background: var(--bg-elevated);
  outline: 3px solid var(--copper-warm);
}

/* Touch Target Size (minimum 44x44px) */
button,
a.btn,
.btn-hero,
input[type="checkbox"],
input[type="radio"] {
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Small text links need padding to meet touch target */
a {
  position: relative;
}

a::before {
  content: '';
  position: absolute;
  top: -8px;
  right: -8px;
  bottom: -8px;
  left: -8px;
}

/* Exception for inline text links */
p a::before,
li a::before {
  content: none;
}

/* Form Labels Always Visible */
label {
  display: block !important;
  visibility: visible !important;
}

/* Placeholder is not a replacement for label */
::-webkit-input-placeholder {
  opacity: 0.6;
}
::-moz-placeholder {
  opacity: 0.6;
}
:-ms-input-placeholder {
  opacity: 0.6;
}
::placeholder {
  opacity: 0.6;
}

/* Error Messages */
[aria-invalid="true"] {
  border-color: var(--error-base) !important;
  border-width: 2px;
}

.form-error[role="alert"] {
  color: var(--error-base);
  font-weight: 600;
}

/* Live Region Polite Announcements */
[aria-live="polite"],
[aria-live="assertive"] {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Focus Trap for Modals */
.modal[aria-modal="true"] {
  position: fixed;
  inset: 0;
  z-index: 9999;
}

.modal[aria-modal="true"]:not([aria-hidden="true"]) {
  display: flex;
}

/* Disabled State Clarity */
button:disabled,
input:disabled,
select:disabled,
textarea:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  position: relative;
}

button:disabled::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 10px,
    rgba(0, 0, 0, 0.05) 10px,
    rgba(0, 0, 0, 0.05) 20px
  );
}

/* Loading State for Screen Readers */
[aria-busy="true"] {
  position: relative;
}

[aria-busy="true"]::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(10, 9, 8, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Reduced Motion */
@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;
  }

  .scroll-indicator {
    animation: none;
  }

  .loading-spinner {
    animation: none;
  }
}

/* Dark Mode Accessibility */
@media (prefers-color-scheme: dark) {
  /* Already handled by design system, but ensure contrast */
  :root {
    --text-primary: #fafafa;
    --text-secondary: #d4d4d4;
    --bg-base: #0a0a0a;
  }
}

/* Language Direction Support */
[dir="rtl"] {
  direction: rtl;
  text-align: right;
}

[dir="rtl"] .nav {
  flex-direction: row-reverse;
}

[dir="rtl"] .footer-grid {
  direction: rtl;
}

/* Print Styles for Accessibility */
@media print {
  .skip-link,
  .nav,
  .footer-social,
  .chatbot,
  .btn-hero,
  .scroll-indicator {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  a {
    text-decoration: underline;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
  }

  /* Don't print URLs for skip links and anchors */
  a[href^="#"]::after,
  a[href^="javascript:"]::after {
    content: "";
  }
}

/* Ensure images have proper alt text indicator in dev */
img:not([alt]) {
  outline: 3px solid red;
}

img[alt=""] {
  outline: 3px solid orange;
}

/* Production: remove the above indicators */
@media (min-width: 1px) {
  img:not([alt]),
  img[alt=""] {
    outline: none;
  }
}

/* Notification/Alert Accessibility */
.alert[role="alert"],
.alert[role="status"] {
  position: relative;
  padding-left: calc(var(--space-lg) + 24px);
}

.alert-icon {
  position: absolute;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
}

/* Table Accessibility */
table {
  border-collapse: collapse;
  width: 100%;
}

th {
  text-align: left;
  font-weight: 700;
  background: var(--bg-elevated);
  padding: var(--space-sm);
}

td {
  padding: var(--space-sm);
  border-top: 1px solid var(--border-subtle);
}

caption {
  caption-side: top;
  font-weight: 700;
  padding: var(--space-sm);
  text-align: left;
}

/* Landmark Regions Clear */
header,
main,
footer,
nav,
aside,
section[aria-label],
section[aria-labelledby] {
  position: relative;
}

/* Breadcrumb Accessibility */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  padding: var(--space-sm) 0;
  list-style: none;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  padding: 0 var(--space-xs);
  color: var(--text-secondary);
}

.breadcrumb-item.active {
  color: var(--text-primary);
  font-weight: 600;
}

/* Tooltip Accessibility */
[role="tooltip"] {
  position: absolute;
  z-index: 1000;
  background: var(--bg-elevated);
  color: var(--text-primary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-md);
  max-width: 250px;
}

/* Progress Indicator */
[role="progressbar"] {
  height: 8px;
  background: var(--bg-elevated);
  border-radius: var(--radius-full);
  overflow: hidden;
}

[role="progressbar"]::before {
  content: '';
  display: block;
  height: 100%;
  background: var(--copper-warm);
  width: var(--progress-value, 0%);
  transition: width var(--duration-base) var(--ease-out);
}

/* Status Messages */
[role="status"] {
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  background: var(--info-light);
  color: var(--info-dark);
}

/* Visually Hidden but Announced */
.visually-hidden {
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}