/**
 * accessibility.css — Global accessibility baseline
 *
 * Lighthouse / WCAG 2.1 AA foundations:
 * 1. Skip-link for keyboard users to bypass repetitive navigation.
 * 2. Visible keyboard focus indicators on all interactive elements.
 * 3. Reduced-motion support for users who prefer minimal animation.
 *
 * Loaded globally via AssetManager so every page benefits.
 */

/* ---------- 1. Skip-link ---------- */
/* Visually hidden off-canvas by default; becomes visible when focused
   so keyboard-only users can jump straight to main content. */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 10000;
  padding: 0.75rem 1.5rem;
  background: #1a1a2e;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 0.375rem 0;
  outline: none;
  transition: top 0.15s ease-in-out;
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 0;
}

/* ---------- 2. Keyboard focus indicators ---------- */
/* Strong, visible outline on interactive elements when navigated via
   keyboard.  Uses :focus-visible so mouse clicks don't show the ring. */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid #4a90d9;
  outline-offset: 2px;
}

/* Fallback for browsers that don't support :focus-visible — uses :focus
   combined with :not(:focus-visible) guard so modern browsers skip it. */
@supports not selector(:focus-visible) {
  a:focus,
  button:focus,
  input:focus,
  select:focus,
  textarea:focus,
  [tabindex]:focus {
    outline: 3px solid #4a90d9;
    outline-offset: 2px;
  }
}

/* ---------- 3. Reduced motion ---------- */
/* Honour user's OS-level preference for reduced motion.  Disables
   non-essential animation, transition, and smooth scrolling so the
   page is usable for vestibular-disorder users. */
@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;
  }
}