/* ============================================
   D-CENTRAL ACCESSIBILITY
   WCAG 2.1 AA compliant enhancements
   ============================================ */

/* ── Skip to Content Link ── */
.dc-skip-link {
  position: absolute;
  top: -100%;
  left: var(--dc-space-md);
  z-index: 999;
  padding: var(--dc-space-sm) var(--dc-space-lg);
  background-color: var(--dc-accent);
  color: var(--dc-text-inverse);
  font-family: var(--dc-font-heading);
  font-size: var(--dc-text-sm);
  font-weight: var(--dc-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  border-radius: 0 0 var(--dc-radius-sm) var(--dc-radius-sm);
  transition: top var(--dc-transition-fast);
}

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


/* ── Focus Indicators ── */
/* Only show focus ring for keyboard navigation, not mouse clicks */
:focus {
  outline: none;
}

:focus-visible {
  outline: 3px solid var(--dc-accent);
  outline-offset: 2px;
}

/* Specific overrides for interactive elements */
a:focus-visible,
button:focus-visible,
[role="button"]:focus-visible {
  outline: 3px solid var(--dc-accent);
  outline-offset: 2px;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--dc-accent);
  outline-offset: 0;
  box-shadow: 0 0 0 3px rgba(255, 110, 0, 0.15);
}

/* Cards and interactive containers */
.dc-card:focus-visible,
.dc-card--interactive:focus-visible {
  outline: 3px solid var(--dc-accent);
  outline-offset: 2px;
  box-shadow: var(--dc-accent-glow-md);
}

/* Tab focus styling */
.dc-tabs__tab:focus-visible {
  outline: 3px solid var(--dc-accent);
  outline-offset: -2px;
}


/* ── Screen Reader Text ── */
.dc-sr-only,
.screen-reader-text {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* Allow screen-reader text to become visible on focus (for skip links etc.) */
.dc-sr-only--focusable:focus,
.screen-reader-text:focus {
  position: static;
  width: auto;
  height: auto;
  padding: var(--dc-space-sm) var(--dc-space-md);
  margin: 0;
  overflow: visible;
  clip: auto;
  clip-path: none;
  white-space: normal;
}


/* ── Minimum Touch Targets ── */
@media (pointer: coarse) {
  button,
  a,
  input[type="checkbox"],
  input[type="radio"],
  select,
  [role="button"],
  [role="tab"],
  .dc-btn,
  .dc-quantity__btn,
  .dc-tabs__tab,
  .dc-tag--removable,
  .dc-toast__close,
  .dc-modal__close,
  .dc-announcement__close,
  .dc-accordion__trigger {
    min-height: 44px;
    min-width: 44px;
  }

  /* Ensure link text areas are large enough */
  .dc-breadcrumb a {
    padding: var(--dc-space-xs) var(--dc-space-sm);
    display: inline-flex;
    align-items: center;
    min-height: 44px;
  }

  .dc-tabs__tab {
    padding: var(--dc-space-md) var(--dc-space-lg);
  }
}


/* ── Reduced Motion ── */
@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;
  }

  /* Disable parallax entirely */
  .dc-parallax {
    transform: none !important;
  }

  /* Make scroll-triggered elements immediately visible */
  .dc-animate-on-scroll {
    opacity: 1;
    transform: none;
  }

  .dc-animate-slide-left,
  .dc-animate-slide-right,
  .dc-animate-scale {
    opacity: 1;
    transform: none;
  }

  /* Disable pulsing indicators, keep them visible */
  .dc-pulse,
  .dc-pulse--success,
  .dc-live-dot,
  .dc-live-dot--success {
    animation: none;
  }

  /* Disable image reveal clip-path */
  .dc-reveal > img,
  .dc-reveal > picture,
  .dc-reveal__inner {
    clip-path: none;
  }

  /* Disable card tilt/hover transforms */
  .dc-card--hover-tilt:hover,
  .dc-card--hover-lift:hover {
    transform: none;
  }

  /* Disable cursor blink */
  .dc-cursor::after {
    animation: none;
    opacity: 1;
  }

  /* Keep skeleton visible but static */
  .dc-skeleton {
    animation: none;
    opacity: 0.5;
  }

  /* Reading progress bar — instant */
  .dc-reading-progress {
    transition: none;
  }
}


/* ── High Contrast Mode ── */
@media (forced-colors: active) {
  .dc-btn--primary {
    border: 2px solid ButtonText;
  }

  .dc-card {
    border: 1px solid CanvasText;
  }

  .dc-progress__fill {
    background-color: Highlight;
  }

  .dc-stars__star--filled svg {
    fill: Highlight;
  }

  .dc-toast {
    border: 1px solid CanvasText;
  }
}


/* ── Color Contrast Verification ── */
/* Utility classes for ensuring minimum 4.5:1 contrast ratio */
.dc-contrast-high {
  color: #FFFFFF;
  /* White on --dc-bg-primary (#0D0D0D) = 19.1:1 ratio */
}

.dc-contrast-on-accent {
  color: var(--dc-text-inverse);
  /* Dark text on --dc-accent (#FF6E00) = 4.6:1 ratio */
}

.dc-contrast-large-text {
  color: var(--dc-text-secondary);
  /* Large text (18px+ bold or 24px+) only needs 3:1 ratio */
  /* --dc-text-secondary (#9CA3AF) on --dc-bg-primary (#0D0D0D) = 8.3:1 */
}


/* ── Aria Live Region Styling ── */
[aria-live="polite"],
[aria-live="assertive"] {
  /* These are normally invisible but announce content changes */
}

.dc-aria-status {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}