/**
 * @file
 * Accessibility rules & focus styles (WCAG 2.1 AA / BFSG)
 */

/* Visible Focus Indicator for Keyboard Navigation */
:focus-visible {
  outline: 3px solid var(--adl-purple) !important;
  outline-offset: 3px !important;
  box-shadow: var(--adl-focus-ring) !important;
}

/* Skip-Links (Top of Page) */
.skip-link {
  position: absolute;
  top: -999px;
  left: 1rem;
  z-index: 9999;
  background-color: var(--adl-purple);
  color: #ffffff !important;
  padding: 0.75rem 1.25rem;
  border-radius: var(--adl-radius-md);
  font-weight: 700;
  text-decoration: none !important;
  box-shadow: var(--adl-shadow-lg);
  transition: top 0.2s ease-in-out;
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 1rem;
  outline: 3px solid #ffffff !important;
  outline-offset: 2px !important;
}

/* Respect Reduced Motion Preferences */
@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;
  }
}

/* Minimum Touch Targets (48x48px) for Mobile Devices */
button, 
.btn, 
.nav-link,
input[type="submit"],
input[type="button"] {
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Visually Hidden Helper (WCAG Screenreader Only) */
.sr-only,
.visually-hidden {
  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;
}

/* Windows High Contrast Mode / Forced Colors Support */
@media (forced-colors: active) {
  :focus-visible {
    outline: 3px solid Highlight !important;
  }
  .adl-font-resizer__btn[aria-pressed="true"],
  .adl-font-resizer__btn.is-active {
    outline: 2px solid Highlight;
  }
}