/*
 * Accessibility CSS Rules for Social Bridge
 * Focus management and keyboard navigation
 */

/* ===============================================
   FOCUS MANAGEMENT - KEYBOARD ONLY
   =============================================== */

/*
 * Modern approach: Use :focus-visible for keyboard focus only
 * This will only show focus styles when navigating with Tab key,
 * not when clicking with mouse
 */

/* Remove default focus outline for all elements */
*:focus {
  outline: none;
}

/* Apply focus styles only for keyboard navigation */
*:focus-visible {
  outline: 2px solid #3b82f6; /* Blue-500 */
  outline-offset: 2px;
  border-radius: 4px;
  transition: outline 0.15s ease-in-out;
}

/* Interactive elements - buttons, links, form controls */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[role="button"]:focus-visible,
[role="link"]:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

/* Specific focus styles for different button types */
.btn-primary:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.3);
}

.btn-secondary:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.btn-danger:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.3);
}

/* Form controls with enhanced focus */
input[type="text"]:focus-visible,
input[type="email"]:focus-visible,
input[type="password"]:focus-visible,
input[type="tel"]:focus-visible,
input[type="url"]:focus-visible,
input[type="search"]:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: -2px;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Checkbox and radio button focus */
input[type="checkbox"]:focus-visible,
input[type="radio"]:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

/* Skip links - should be visible when focused */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: #000000;
  color: #ffffff;
  padding: 8px;
  text-decoration: none;
  border-radius: 4px;
  z-index: 1000;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.3s ease;
}

.skip-link:focus-visible {
  top: 6px;
  opacity: 1;
  transform: translateY(0);
  outline: 2px solid #ffffff;
  outline-offset: 2px;
}

/* ===============================================
   HIGH CONTRAST MODE SUPPORT
   =============================================== */

@media (prefers-contrast: high) {
  *:focus-visible {
    outline: 3px solid;
    outline-offset: 2px;
  }

  button:focus-visible,
  a:focus-visible,
  input:focus-visible,
  textarea:focus-visible,
  select:focus-visible {
    outline: 3px solid;
    outline-offset: 2px;
  }
}

/* ===============================================
   REDUCED MOTION SUPPORT
   =============================================== */

@media (prefers-reduced-motion: reduce) {
  *:focus-visible {
    transition: none;
  }

  .skip-link {
    transition: none;
  }
}

/* ===============================================
   FOCUS MANAGEMENT FOR SPECIFIC COMPONENTS
   =============================================== */

/* Navigation focus styles */
nav a:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 4px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 4px;
}

/* Card/clickable container focus */
.card:focus-visible,
.clickable-card:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1), 0 0 0 4px rgba(59, 130, 246, 0.1);
}

/* Modal/dialog focus management */
.modal:focus-visible,
.dialog:focus-visible {
  outline: none; /* Modal container shouldn't show outline */
}

.modal-close:focus-visible,
.dialog-close:focus-visible {
  outline: 2px solid #ef4444;
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.1);
}

/* Dropdown/menu focus styles */
.dropdown-item:focus-visible,
.menu-item:focus-visible {
  outline: none;
  background: rgba(59, 130, 246, 0.1);
  color: #1e40af;
}

/* Tab navigation focus */
.tab:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: -2px;
  z-index: 1;
}

/* ===============================================
   UTILITY CLASSES FOR ACCESSIBILITY
   =============================================== */

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

/* Skip focus management for decorative elements */
.no-focus {
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
  pointer-events: none;
  -webkit-touch-callout: none;
}

/* Focus trap helpers */
.focus-trap-boundary {
  /* Used by JavaScript to manage focus within modals/dialogs */
}

/* Ensure minimum touch target size (44x44px) */
.touch-target {
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ===============================================
   CURSOR INTEGRATION WITH FOCUS MANAGEMENT
   =============================================== */

/* Ensure cursor styles work with focus-visible */
button:focus-visible,
a:focus-visible,
input[type="checkbox"]:focus-visible,
input[type="radio"]:focus-visible,
select:focus-visible,
[role="button"]:focus-visible,
[tabindex]:focus-visible {
  cursor: pointer;
}

/* Text inputs maintain text cursor even when focused */
input[type="text"]:focus-visible,
input[type="email"]:focus-visible,
input[type="password"]:focus-visible,
input[type="tel"]:focus-visible,
input[type="url"]:focus-visible,
input[type="search"]:focus-visible,
input[type="number"]:focus-visible,
textarea:focus-visible {
  cursor: text;
}

/* Disabled elements maintain not-allowed cursor */
button:disabled:focus-visible,
[type="button"]:disabled:focus-visible,
[type="submit"]:disabled:focus-visible,
[type="reset"]:disabled:focus-visible,
[role="button"][aria-disabled="true"]:focus-visible,
a[aria-disabled="true"]:focus-visible,
input:disabled:focus-visible,
select:disabled:focus-visible,
textarea:disabled:focus-visible {
  cursor: not-allowed;
}

/* ===============================================
   BROWSER FALLBACKS
   =============================================== */

/* Fallback for browsers that don't support :focus-visible */
@supports not selector(:focus-visible) {
  /* Only show focus on keyboard navigation using a JavaScript polyfill approach */
  .js-focus-visible *:focus:not(.focus-visible) {
    outline: none;
  }

  .js-focus-visible .focus-visible {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
  }
}

/* ===============================================
   TAILWIND INTEGRATION OVERRIDES
   =============================================== */

/* Override Tailwind's focus styles to use our keyboard-only approach */
.focus\:outline-none:focus-visible {
  outline: 2px solid #3b82f6 !important;
  outline-offset: 2px !important;
}

.focus\:ring-2:focus-visible {
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1) !important;
}

.focus\:ring-blue-500:focus-visible {
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1) !important;
}

.focus\:ring-red-500:focus-visible {
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.1) !important;
}

.focus\:ring-gray-500:focus-visible {
  box-shadow: 0 0 0 4px rgba(107, 114, 128, 0.1) !important;
}

/* Ensure focus styles only appear with keyboard navigation */
.focus\:ring-2:focus:not(:focus-visible) {
  box-shadow: none !important;
}

.focus\:outline-none:focus:not(:focus-visible) {
  outline: none !important;
}

/* ===============================================
   CUSTOM SCROLLBAR STYLING
   =============================================== */

/* Custom scrollbar for time picker and other components */
.scrollbar-thin {
  scrollbar-width: thin;
  scrollbar-color: rgba(156, 163, 175, 0.5) transparent;
}

.scrollbar-thin::-webkit-scrollbar {
  width: 6px;
}

.scrollbar-thin::-webkit-scrollbar-track {
  background: transparent;
}

.scrollbar-thin::-webkit-scrollbar-thumb {
  background-color: rgba(156, 163, 175, 0.5);
  border-radius: 3px;
}

.scrollbar-thin::-webkit-scrollbar-thumb:hover {
  background-color: rgba(107, 114, 128, 0.7);
}