/* CHATWITHPDFAI.COM — Accessibility helpers
   Universal focus rings, screen-reader utilities, motion preferences */

/* Visible focus rings everywhere — Aurora-themed */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--violet) !important;
  outline-offset: 2px;
  border-radius: var(--r-sm);
  box-shadow: 0 0 0 4px rgba(183, 106, 255, 0.15);
}
.btn:focus-visible, .chip:focus-visible, .pill:focus-visible { outline-offset: 3px; }
input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--violet) !important;
  outline-offset: 0;
}

/* Skip-to-content link — hidden until focused */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--violet);
  color: #fff;
  padding: 10px 18px;
  border-radius: var(--r);
  font-weight: 600;
  font-size: 13.5px;
  z-index: 9999;
  transition: top .15s;
  text-decoration: none;
}
.skip-link:focus {
  top: 16px;
  outline: 2px solid #fff;
  outline-offset: 2px;
}

/* Screen-reader-only utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.sr-only-focusable:not(:focus) {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Honor reduced-motion preference */
@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;
  }
  .pulseDot, .shimmer { animation: none !important; }
}

/* Honor high-contrast preference */
@media (prefers-contrast: more) {
  :root {
    --text-2: rgba(255, 255, 255, 0.95);
    --text-3: rgba(255, 255, 255, 0.85);
    --text-4: rgba(255, 255, 255, 0.65);
    --stroke-1: rgba(255, 255, 255, 0.25);
    --stroke-2: rgba(255, 255, 255, 0.4);
    --stroke-3: rgba(255, 255, 255, 0.55);
  }
  .btn { border-width: 2px !important; }
  .glass { border-color: var(--stroke-2) !important; }
}

/* Touch-target minimum on small devices */
@media (max-width: 720px) {
  .btn-sm, .chip { min-height: 36px; }
  .btn { min-height: 44px; }
  input.input { min-height: 44px; }
}

/* Live-region updates (screen-reader-friendly toasts) */
[aria-live] { position: relative; }