/* ==========================================================================
   DeltaSmart Toast Notification System
   Phase 4 of the Frontend UI/UX Overhaul.
   All values reference --ds-* design tokens from design-tokens.css.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Toast Container — fixed bottom-right, stacked vertically
   -------------------------------------------------------------------------- */
.ds-toast-container {
  position: fixed;
  bottom: var(--ds-space-6);
  right: var(--ds-space-6);
  z-index: var(--ds-z-toast);
  display: flex;
  flex-direction: column-reverse;   /* newest on top */
  gap: var(--ds-space-3);
  pointer-events: none;             /* allow clicks through gaps */
  max-height: calc(100vh - var(--ds-space-12));
  overflow: hidden;
}

/* --------------------------------------------------------------------------
   Individual Toast
   -------------------------------------------------------------------------- */
.ds-toast {
  pointer-events: auto;             /* re-enable clicks on the toast itself */
  display: flex;
  align-items: flex-start;
  gap: var(--ds-space-3);
  min-width: 320px;
  max-width: 420px;
  padding: var(--ds-space-4);
  border-radius: var(--ds-radius-lg);
  background: var(--ds-surface-raised);
  border: 1px solid var(--ds-border-default);
  box-shadow: var(--ds-shadow-lg);
  color: var(--ds-text-primary);
  font-family: var(--ds-font-family);
  font-size: var(--ds-font-size-base);
  line-height: var(--ds-line-height-normal);
  position: relative;
  overflow: hidden;

  /* Slide-in animation */
  animation: ds-toast-in var(--ds-duration-slow) var(--ds-ease-out) forwards;
}

.ds-toast.ds-toast-out {
  animation: ds-toast-out var(--ds-duration-normal) var(--ds-ease-in) forwards;
}

@keyframes ds-toast-in {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes ds-toast-out {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}

/* --------------------------------------------------------------------------
   Toast Icon
   -------------------------------------------------------------------------- */
.ds-toast-icon {
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--ds-font-size-lg);
  line-height: 1;
  margin-top: 1px;
}

/* --------------------------------------------------------------------------
   Toast Body (message + optional action)
   -------------------------------------------------------------------------- */
.ds-toast-body {
  flex: 1;
  min-width: 0;
}

.ds-toast-message {
  margin: 0;
  font-weight: var(--ds-font-weight-medium);
  word-wrap: break-word;
}

.ds-toast-action {
  display: inline-flex;
  align-items: center;
  gap: var(--ds-space-1);
  margin-top: var(--ds-space-2);
  padding: var(--ds-space-1) var(--ds-space-2);
  border-radius: var(--ds-radius-sm);
  font-size: var(--ds-font-size-sm);
  font-weight: var(--ds-font-weight-semibold);
  text-decoration: none;
  transition: var(--ds-transition-fast);
  cursor: pointer;
  border: none;
  background: transparent;
}

.ds-toast-action:hover {
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Toast Close Button
   -------------------------------------------------------------------------- */
.ds-toast-close {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  padding: 0;
  border: none;
  border-radius: var(--ds-radius-sm);
  background: transparent;
  color: var(--ds-text-muted);
  font-size: var(--ds-font-size-md);
  cursor: pointer;
  transition: var(--ds-transition-fast);
  line-height: 1;
}

.ds-toast-close:hover {
  background: rgba(0, 0, 0, 0.08);
  color: var(--ds-text-primary);
}

[data-bs-theme="dark"] .ds-toast-close:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* --------------------------------------------------------------------------
   Progress Bar (auto-dismiss countdown)
   -------------------------------------------------------------------------- */
.ds-toast-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  border-radius: 0 0 var(--ds-radius-lg) var(--ds-radius-lg);
  animation: ds-toast-progress linear forwards;
}

@keyframes ds-toast-progress {
  from {
    width: 100%;
  }
  to {
    width: 0%;
  }
}

/* Pause progress when hovering */
.ds-toast:hover .ds-toast-progress {
  animation-play-state: paused;
}

/* --------------------------------------------------------------------------
   Variant: Success
   -------------------------------------------------------------------------- */
.ds-toast-success {
  border-left: 4px solid var(--ds-success);
}

.ds-toast-success .ds-toast-icon {
  color: var(--ds-success);
}

.ds-toast-success .ds-toast-progress {
  background: var(--ds-success);
}

.ds-toast-success .ds-toast-action {
  color: var(--ds-success);
}

/* --------------------------------------------------------------------------
   Variant: Error
   -------------------------------------------------------------------------- */
.ds-toast-error {
  border-left: 4px solid var(--ds-danger);
}

.ds-toast-error .ds-toast-icon {
  color: var(--ds-danger);
}

.ds-toast-error .ds-toast-progress {
  background: var(--ds-danger);
}

.ds-toast-error .ds-toast-action {
  color: var(--ds-danger);
}

/* --------------------------------------------------------------------------
   Variant: Warning
   -------------------------------------------------------------------------- */
.ds-toast-warning {
  border-left: 4px solid var(--ds-warning);
}

.ds-toast-warning .ds-toast-icon {
  color: var(--ds-warning);
}

.ds-toast-warning .ds-toast-progress {
  background: var(--ds-warning);
}

.ds-toast-warning .ds-toast-action {
  color: var(--ds-warning);
}

/* --------------------------------------------------------------------------
   Variant: Info
   -------------------------------------------------------------------------- */
.ds-toast-info {
  border-left: 4px solid var(--ds-brand-primary);
}

.ds-toast-info .ds-toast-icon {
  color: var(--ds-brand-primary);
}

.ds-toast-info .ds-toast-progress {
  background: var(--ds-brand-primary);
}

.ds-toast-info .ds-toast-action {
  color: var(--ds-brand-primary);
}

/* --------------------------------------------------------------------------
   Mobile Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 575.98px) {
  .ds-toast-container {
    left: var(--ds-space-3);
    right: var(--ds-space-3);
    bottom: var(--ds-space-3);
  }

  .ds-toast {
    min-width: 0;
    max-width: none;
    width: 100%;
  }
}

/* --------------------------------------------------------------------------
   Print: hide toasts
   -------------------------------------------------------------------------- */
@media print {
  .ds-toast-container {
    display: none !important;
  }
}