/**
 * Accessibility Styles for Motion Studio
 * Screen reader only, focus indicators, and accessibility helpers
 */

/* Screen reader only content - visible to assistive tech, hidden visually */
.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;
}

/* Focus indicators - visible outline for keyboard users */
button:focus,
input:focus,
select:focus,
textarea:focus,
[role="button"]:focus,
[role="tab"]:focus,
[role="gridcell"]:focus {
  outline: 3px solid #007bff;
  outline-offset: 2px;
}

/* Focus indicators for dark backgrounds */
body.dark-mode button:focus,
body.dark-mode input:focus,
body.dark-mode select:focus,
body.dark-mode textarea:focus {
  outline: 3px solid #4da3ff;
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: more) {
  button:focus,
  input:focus,
  select:focus,
  textarea:focus,
  [role="button"]:focus,
  [role="tab"]:focus,
  [role="gridcell"]:focus {
    outline-width: 4px;
    outline-offset: 3px;
  }
}

/* Reduced motion support - disable animations for users with motion sensitivity */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

/* Large text mode support - 200% zoom accessibility */
@media (prefers-contrast: more) {
  body {
    font-size: 18px;
  }

  input,
  button,
  select,
  textarea {
    font-size: 16px;
  }
}

/* High DPI / retina display support */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  button,
  input[type="button"],
  input[type="submit"],
  input[type="reset"] {
    border-width: 2px;
  }
}

/* Focus visible polyfill for older browsers */
.js-focus-visible :focus:not(.focus-visible) {
  outline: none;
}

.js-focus-visible .focus-visible {
  outline: 3px solid #007bff;
  outline-offset: 2px;
}

/* Motion Studio specific accessibility enhancements */

/* Panel and modal focus management */
[role="dialog"]:focus,
[role="alertdialog"]:focus,
[role="complementary"]:focus {
  outline: 2px solid #007bff;
}

/* Grid and list navigation */
[role="grid"] {
  border: 1px solid #ddd;
}

[role="gridcell"] {
  border: 1px solid #eee;
  padding: 8px;
}

[role="gridcell"]:focus {
  box-shadow: inset 0 0 0 3px #007bff;
}

/* Selection badge accessibility */
[role="status"] {
  min-height: 1.5em;
}

/* Form field accessibility */
label {
  display: block;
  margin-bottom: 4px;
  font-weight: 500;
}

label[aria-required="true"]::after {
  content: " *";
  color: #dc3545;
  font-weight: bold;
}

input[aria-invalid="true"],
textarea[aria-invalid="true"],
select[aria-invalid="true"] {
  border-color: #dc3545;
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

/* Range slider accessibility */
input[type="range"] {
  cursor: pointer;
}

input[type="range"]:focus {
  outline: 3px solid #007bff;
  outline-offset: 2px;
}

/* Timeline scrubber accessibility */
input[type="range"]::-webkit-slider-thumb {
  outline: none;
}

input[type="range"]:focus::-webkit-slider-thumb {
  box-shadow: 0 0 0 3px #007bff;
}

input[type="range"]:focus::-moz-range-thumb {
  outline: 3px solid #007bff;
  outline-offset: 2px;
}

/* Button states for accessibility */
button[aria-pressed="true"],
button[aria-selected="true"] {
  box-shadow: inset 0 0 0 2px #007bff;
}

button[aria-disabled="true"],
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Color picker accessibility */
input[type="color"]:focus {
  outline: 3px solid #007bff;
  outline-offset: 2px;
  border-radius: 4px;
}

/* Breakpoint switcher - radio group */
[role="radio"]:focus {
  outline: 3px solid #007bff;
  outline-offset: 2px;
}

/* Typography - sufficient contrast */
body {
  color: #212529;
  background-color: #fff;
}

@media (prefers-color-scheme: dark) {
  body {
    color: #e9ecef;
    background-color: #212529;
  }
}

/* Link styling - obvious that it's a link */
a {
  color: #0066cc;
  text-decoration: underline;
}

a:visited {
  color: #551a8b;
}

a:focus {
  outline: 3px solid #0066cc;
  outline-offset: 2px;
  border-radius: 2px;
}

/* Animation and motion support */
.motion-safe {
  animation: slidein 0.3s ease-in-out;
}

@media (prefers-reduced-motion: reduce) {
  .motion-safe {
    animation: none;
  }
}

/* Visible skip link for keyboard navigation */
a.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #000;
  color: white;
  padding: 8px;
  text-decoration: none;
  z-index: 100;
}

a.skip-link:focus {
  top: 0;
  outline: none;
}

/* Tooltip accessibility */
[role="tooltip"] {
  background: #333;
  color: #fff;
  padding: 8px;
  border-radius: 4px;
  font-size: 12px;
  max-width: 250px;
  word-wrap: break-word;
}

/* Help text styling */
.form-help,
[aria-describedby] {
  font-size: 12px;
  color: #666;
  margin-top: 4px;
}

/* Error messages */
.form-error,
[role="alert"] {
  color: #dc3545;
  background: #f8d7da;
  padding: 12px;
  border-radius: 4px;
  margin: 8px 0;
  border-left: 4px solid #dc3545;
}

/* Success messages */
.form-success {
  color: #155724;
  background: #d4edda;
  padding: 12px;
  border-radius: 4px;
  margin: 8px 0;
  border-left: 4px solid #28a745;
}

/* Loading states */
[aria-busy="true"] {
  opacity: 0.6;
  pointer-events: none;
}

/* Disabled states */
[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Print styles - hide unnecessary UI elements */
@media print {
  button,
  [role="button"],
  [role="toolbar"],
  .editor-controls {
    display: none !important;
  }

  body {
    line-height: 1.6;
    font-size: 12pt;
  }
}

/* Print preview mode */
@media screen and (prefers-color-scheme: light) {
  body {
    color-scheme: light;
  }
}

@media screen and (prefers-color-scheme: dark) {
  body {
    color-scheme: dark;
  }
}

/* Viewport size awareness - don't rely on font size alone */
@media (min-width: 768px) {
  /* Desktop - normal sizing */
}

@media (max-width: 767px) {
  /* Mobile - larger touch targets (44x44px minimum) */
  button,
  [role="button"],
  a {
    min-height: 44px;
    min-width: 44px;
  }
}

/* Touch device support */
@media (hover: hover) {
  /* Has hover capability */
  button:hover,
  [role="button"]:hover {
    opacity: 0.8;
  }
}

@media (hover: none) {
  /* Touch device - no hover */
  button,
  [role="button"] {
    min-height: 48px;
    min-width: 48px;
  }
}

/* ARIA expanded and hidden states */
[aria-expanded="true"] {
  display: block;
}

[aria-expanded="false"],
[aria-hidden="true"] {
  display: none;
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 3px solid #007bff;
  outline-offset: 2px;
}