/* =========================================================
   CODERN
   Accessibility System
   ========================================================= */

/* ---------------------------------------------------------
   Skip Link
   --------------------------------------------------------- */

.skip-link {
  position: fixed;
  top: 0;
  left: 16px;
  z-index: 10000;

  padding: 12px 18px;

  background: var(--color-primary);
  color: var(--color-on-primary);

  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1;

  border-radius: 0 0 var(--radius-md) var(--radius-md);

  transform: translateY(-120%);
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast);

  text-decoration: none;
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);

  outline: 3px solid var(--color-text);
  outline-offset: 3px;

  box-shadow: var(--shadow-primary);
}


/* ---------------------------------------------------------
   Screen Reader Only
   --------------------------------------------------------- */

.sr-only {
  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;
  clip-path: inset(50%) !important;

  white-space: nowrap !important;

  border: 0 !important;
}


/* ---------------------------------------------------------
   Focus System
   --------------------------------------------------------- */

:where(
  a,
  button,
  input,
  textarea,
  select,
  summary,
  [tabindex]:not([tabindex="-1"])
):focus {
  outline: none;
}

:where(
  a,
  button,
  input,
  textarea,
  select,
  summary,
  [tabindex]:not([tabindex="-1"])
):focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;

  border-radius: var(--radius-sm);
}


/* ---------------------------------------------------------
   Buttons / Interactive Controls
   --------------------------------------------------------- */

button,
a,
input,
textarea,
select,
summary {
  -webkit-tap-highlight-color: transparent;
}

button:disabled,
input:disabled,
textarea:disabled,
select:disabled {
  cursor: not-allowed;
}


/* ---------------------------------------------------------
   Links
   --------------------------------------------------------- */

a {
  text-underline-offset: 3px;
}

a:focus-visible {
  text-decoration-thickness: 2px;
}


/* ---------------------------------------------------------
   Form Accessibility
   --------------------------------------------------------- */

[aria-invalid="true"] {
  outline: 2px solid #dc3545;
  outline-offset: 2px;
}

.field-error {
  display: block;
}

.field-error[hidden] {
  display: none;
}


/* ---------------------------------------------------------
   Live Regions
   --------------------------------------------------------- */

[aria-live] {
  position: relative;
}

[data-status-message][hidden] {
  display: none;
}


/* ---------------------------------------------------------
   Reduced Motion
   --------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto !important;
  }
}


/* ---------------------------------------------------------
   Forced Colors / High Contrast
   --------------------------------------------------------- */

@media (forced-colors: active) {
  .skip-link {
    border: 2px solid ButtonText;
  }

  :where(
    a,
    button,
    input,
    textarea,
    select,
    summary,
    [tabindex]:not([tabindex="-1"])
  ):focus-visible {
    outline: 3px solid Highlight;
  }

  button,
  input,
  textarea,
  select {
    forced-color-adjust: auto;
  }
}


/* ---------------------------------------------------------
   Touch Targets
   --------------------------------------------------------- */

@media (pointer: coarse) {
  :where(
    button,
    [role="button"],
    input[type="checkbox"],
    input[type="radio"]
  ) {
    min-width: 44px;
    min-height: 44px;
  }
}


/* ---------------------------------------------------------
   Prevent Focus Ring From Being Lost Behind Fixed UI
   --------------------------------------------------------- */

:where(
  a,
  button,
  input,
  textarea,
  select,
  summary,
  [tabindex]:not([tabindex="-1"])
):focus-visible {
  scroll-margin-top: 120px;
}


/* ---------------------------------------------------------
   Modal Accessibility Helpers
   --------------------------------------------------------- */

[aria-hidden="true"] {
  pointer-events: none;
}

[aria-hidden="true"] :where(
  a,
  button,
  input,
  textarea,
  select,
  summary,
  [tabindex]:not([tabindex="-1"])
) {
  pointer-events: none;
}


/* ---------------------------------------------------------
   Decorative Elements
   --------------------------------------------------------- */

[aria-hidden="true"] {
  user-select: none;
}


/* ---------------------------------------------------------
   Print
   --------------------------------------------------------- */

@media print {
  .skip-link,
  .sr-only {
    display: none !important;
  }

  :where(
    a,
    button,
    input,
    textarea,
    select,
    summary
  ):focus-visible {
    outline: none;
  }
}