@layer cinder.tokens, cinder.foundation, cinder.components, cinder.utilities;
@layer cinder.components {
  /* ========================================
 * TOAST REGION
 * Two stacked aria-live regions (polite + assertive) anchored to the
 * bottom-right of the viewport. Toast.svelte owns the visual treatment of
 * individual toasts via the .cinder-toast class.
 * ======================================== */

  .cinder-toast-region {
    position: fixed;
    display: flex;
    flex-direction: column;
    gap: var(--cinder-space-2);
    z-index: var(--cinder-z-toast);
    pointer-events: none;
    /* Stack the two aria-live channels in the same visual column. Each channel
   * is independent — a polite warning and an assertive danger toast may sit
   * side-by-side visually but route to different SR-announcement queues. */
  }

  .cinder-toast-region[data-cinder-position^='top'] {
    top: var(--cinder-space-4);
  }

  .cinder-toast-region[data-cinder-position^='bottom'] {
    bottom: var(--cinder-space-4);
  }

  .cinder-toast-region[data-cinder-position$='left'] {
    left: var(--cinder-space-4);
    align-items: flex-start;
  }

  .cinder-toast-region[data-cinder-position$='center'] {
    left: 50%;
    align-items: center;
    transform: translateX(-50%);
  }

  .cinder-toast-region[data-cinder-position$='right'] {
    right: var(--cinder-space-4);
    align-items: flex-end;
  }

  .cinder-toast-region__channel {
    display: flex;
    flex-direction: column;
    gap: var(--cinder-space-2);
  }

  .cinder-toast-region[data-cinder-position^='top'] .cinder-toast-region__channel {
    flex-direction: column-reverse;
  }

  .cinder-toast-shell {
    display: block;
    max-height: var(--cinder-toast-height, none);
    opacity: 1;
    transition:
      max-height var(--cinder-duration-fast) var(--cinder-ease-standard),
      opacity var(--cinder-duration-fast) var(--cinder-ease-standard),
      margin-block var(--cinder-duration-fast) var(--cinder-ease-standard);
  }

  .cinder-toast-shell[data-cinder-presence='exiting'] {
    max-height: 0;
    opacity: 0;
    margin-block: 0;
    overflow: hidden;
  }

  /* ----------------------------------------
 * Individual toast
 * ---------------------------------------- */

  .cinder-toast {
    pointer-events: auto;
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: var(--cinder-space-3);
    min-width: 18rem;
    max-width: 28rem;
    padding: var(--cinder-space-3) var(--cinder-space-4);
    background: var(--cinder-surface-raised);
    border: 1px solid var(--cinder-border);
    border-radius: var(--cinder-radius-md);
    box-shadow:
      inset 0 1px 0 light-dark(transparent, oklch(100% 0 0 / 0.06)),
      0 1px 2px oklch(0% 0 0 / 0.04),
      0 4px 12px oklch(0% 0 0 / 0.08);
    font-size: var(--cinder-text-sm);
    color: var(--cinder-text-default);
    touch-action: pan-y;
    transform: translateX(var(--cinder-toast-swipe-x, 0))
      translateY(calc(var(--cinder-toast-stack-index, 0) * -2px));
    transition:
      transform var(--cinder-duration-fast) var(--cinder-ease-standard),
      opacity var(--cinder-duration-fast) var(--cinder-ease-standard);
    /* Smooth in/out at default speed; reduced-motion zeroes the duration via
   * the global motion tokens. */
    animation: cinder-toast-in var(--cinder-duration-fast) var(--cinder-ease-decelerate);
  }

  .cinder-toast[data-cinder-swiping='true'] {
    user-select: none;
  }

  @keyframes cinder-toast-in {
    from {
      opacity: 0;
    }
    to {
      opacity: 1;
    }
  }

  @keyframes cinder-toast-spinner-spin {
    to {
      transform: rotate(360deg);
    }
  }

  @media (prefers-reduced-motion: reduce) {
    :root:not([data-cinder-reduced-motion='false']):not([data-reduced-motion='off'])
      .cinder-toast-shell,
    :root:not([data-cinder-reduced-motion='false']):not([data-reduced-motion='off']) .cinder-toast,
    :root:not([data-cinder-reduced-motion='false']):not([data-reduced-motion='off'])
      .cinder-toast__spinner {
      animation: none;
      transition-duration: 0ms;
    }
  }

  /* Variant accent stripe — drawn as a ::before pseudo so it sits inside the
 * toast's border-radius without fighting border-left's miter corners. The
 * stripe rounds its own start-side corners (matching the toast's outer
 * radius minus the 1px border) so the parent toast does not need
 * `overflow: hidden`, which would clip the dismiss button's 44×44 ::after
 * hit-area pseudo-element. */
  .cinder-toast[data-cinder-variant]::before {
    content: '';
    position: absolute;
    /* Sit just inside the toast's 1px border so the stripe doesn't cover it. */
    inset-block: 0;
    inset-inline-start: 0;
    width: 3px;
    background: var(--_cinder-toast-accent, transparent);
    border-start-start-radius: calc(var(--cinder-radius-md) - 1px);
    border-end-start-radius: calc(var(--cinder-radius-md) - 1px);
  }

  .cinder-toast[data-cinder-variant='info'] {
    --_cinder-toast-accent: var(--cinder-status-info-solid);
  }

  .cinder-toast[data-cinder-variant='success'] {
    --_cinder-toast-accent: var(--cinder-status-success-solid);
  }

  .cinder-toast[data-cinder-variant='warning'] {
    --_cinder-toast-accent: var(--cinder-status-warning-solid);
  }

  .cinder-toast[data-cinder-variant='danger'] {
    --_cinder-toast-accent: var(--cinder-status-danger-solid);
  }

  .cinder-toast__icon {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
    line-height: 0;
    color: var(--_cinder-toast-accent, var(--cinder-text-muted));
  }

  .cinder-toast__spinner {
    display: inline-block;
    flex-shrink: 0;
    width: var(--cinder-spinner-size-sm, 1rem);
    height: var(--cinder-spinner-size-sm, 1rem);
    border: 1.5px solid color-mix(in srgb, currentColor 25%, transparent);
    border-top-color: currentColor;
    border-radius: 50%;
    color: var(--_cinder-toast-accent, var(--cinder-text-muted));
    animation: cinder-toast-spinner-spin var(--cinder-duration-spin) linear infinite;
  }

  .cinder-toast__message {
    flex: 1 1 auto;
    line-height: var(--cinder-leading-normal);
  }

  .cinder-toast__action {
    appearance: none;
    background: none;
    border: none;
    padding: 0;
    font: inherit;
    font-weight: var(--cinder-font-medium);
    color: var(--cinder-accent-text);
    cursor: pointer;
    border-radius: var(--cinder-radius-sm);
  }

  .cinder-toast__action:focus-visible {
    outline: var(--cinder-ring-width) solid transparent;
    box-shadow: var(--_cinder-focus-ring-shadow);
  }

  .cinder-toast__dismiss {
    appearance: none;
    background: none;
    border: none;
    padding: var(--cinder-space-0-5);
    margin: 0;
    color: var(--cinder-text-muted);
    cursor: pointer;
    border-radius: var(--cinder-radius-sm);
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    /* Anchor the WCAG 2.5.5 hit-area pseudo-element below. */
    position: relative;
  }

  .cinder-toast__dismiss svg {
    width: 1rem;
    height: 1rem;
  }

  /*
 * Expand the interactive hit area to 44×44 px (WCAG 2.5.5) without affecting
 * layout. Mirrors the alert dismiss treatment.
 */
  .cinder-toast__dismiss::after {
    content: '';
    position: absolute;
    inset: 50% auto auto 50%;
    width: 44px;
    height: 44px;
    transform: translate(-50%, -50%);
  }

  @media (hover: hover) {
    .cinder-toast__dismiss:hover {
      color: var(--cinder-text-default);
      background: var(--cinder-surface-hover);
    }
  }

  .cinder-toast__dismiss:focus-visible {
    outline: var(--cinder-ring-width) solid transparent;
    box-shadow: var(--_cinder-focus-ring-shadow);
  }

  @media (forced-colors: active) {
    .cinder-toast__action:focus-visible,
    .cinder-toast__dismiss:focus-visible {
      /* Repaint the full outline channel — the transparent placeholder above
       must be overpainted with a system color, not just recolored. */
      outline: var(--cinder-ring-width) solid ButtonText;
      outline-offset: 3px;
    }
  }
}