/* ============================================
   ACCESSIBILITY ENHANCEMENTS
   WCAG 2.1 AA Compliant
   ============================================ */

/* ===== FOCUS INDICATORS ===== */

/* Enhanced focus for keyboard navigation */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Skip to content link */
.skip-to-content {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: var(--z-tooltip);

  padding: var(--space-3) var(--space-5);

  background: var(--color-primary);
  color: var(--color-white);
  font-weight: var(--font-weight-semibold);

  transition: top var(--transition-fast);
}

.skip-to-content:focus {
  top: 0;
}

/* ===== ARIA LIVE REGIONS ===== */

/* Screen reader only content already defined in base.css */

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

@media (prefers-contrast: high) {
  :root {
    --color-primary: #0056b3;
    --color-neutral-600: #000;
  }

  button,
  .btn,
  input,
  select,
  textarea {
    border: 2px solid currentColor;
  }
}

/* ===== FORCED COLORS MODE (Windows High Contrast) ===== */

@media (forced-colors: active) {
  button,
  .btn {
    border: 1px solid ButtonText;
  }

  .slider-arrow {
    border: 1px solid ButtonText;
  }
}

/* ===== KEYBOARD NAVIGATION HINTS ===== */

/* Show focus on tab navigation only */
:focus:not(:focus-visible) {
  outline: none;
}

/* ===== LOADING STATES ===== */

[aria-busy="true"] {
  cursor: wait;
  opacity: 0.6;
}

/* ===== ERROR STATES ===== */

[aria-invalid="true"] {
  border-color: var(--color-error);
}

[aria-invalid="true"]:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

.error-message {
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--space-1);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.error-message::before {
  content: '⚠';
  font-size: var(--font-size-base);
}