/* ========================================
   Accessibility Utilities
   ======================================== */

/* Skip links - for keyboard navigation */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--primary-600);
  color: white;
  padding: var(--space-3) var(--space-6);
  text-decoration: none;
  font-weight: var(--font-semibold);
  font-size: var(--text-base);
  border-radius: 0 0 var(--radius-md) 0;
  z-index: 10000;
  transition: top var(--transition-fast);
  box-shadow: var(--shadow-lg);
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--primary-200);
  outline-offset: 2px;
}

/* Enhanced focus styles */
*:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
  border-radius: var(--radius-base);
}

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

/* Focus styles for interactive elements */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--primary-100);
}

/* Focus styles for cards and clickable elements */
.card:focus-visible,
.member-card:focus-visible,
.video-card:focus-visible,
.stream-card:focus-visible,
.post-card:focus-visible {
  outline: 3px solid var(--primary-500);
  outline-offset: 3px;
  box-shadow: var(--shadow-xl);
}

/* Focus styles for navigation */
.site-nav a:focus-visible {
  background: rgba(255, 255, 255, 0.2);
  outline: 2px solid white;
  outline-offset: 4px;
}

/* Focus styles for buttons */
.btn:focus-visible,
.btn-primary:focus-visible,
.btn-secondary:focus-visible {
  outline: 2px solid var(--primary-700);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px var(--primary-100);
}

/* Error button focus */
.error-btn:focus-visible {
  outline: 2px solid var(--error);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.2);
}

/* Visually hidden but accessible to screen readers */
.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;
}

/* Focusable when navigated to via keyboard */
.sr-only-focusable:focus {
  position: static;
  width: auto;
  height: auto;
  padding: inherit;
  margin: inherit;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  * {
    border-color: currentColor;
  }

  a:focus-visible,
  button:focus-visible {
    outline-width: 3px;
  }
}

/* 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 animations for loading states */
  .spinner,
  .skeleton,
  .skeleton-line,
  .skeleton-thumbnail,
  .skeleton-avatar {
    animation: none !important;
    background: var(--gray-200) !important;
  }
}

/* Focus trap for modals (future use) */
.focus-trap {
  position: fixed;
  inset: 0;
  z-index: 9999;
}

/* Keyboard navigation hints */
[tabindex="0"]:not(a):not(button):not(input):not(select):not(textarea) {
  cursor: pointer;
}

/* Improve text selection */
::selection {
  background-color: var(--primary-200);
  color: var(--text-color);
}

::-moz-selection {
  background-color: var(--primary-200);
  color: var(--text-color);
}