/* =============================================================================
   toast.css - Transient feedback messages (`js/UI/components/Toast.js`).

   Reference: `.docs/steps/7.md` point 3. The stack is fixed above the bottom
   navigation, ignores pointer events (a toast must never swallow a tap) and
   animates with `opacity`/`transform` only. Colors come from `css/themes.css`.
   ============================================================================= */

.toast-stack {
  position: fixed;
  left: 50%;
  bottom: calc(var(--nav-height) + var(--space-4) + env(safe-area-inset-bottom, 0px));
  z-index: calc(var(--z-overlay) + 1);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  width: min(100% - (2 * var(--space-4)), 26rem);
  transform: translateX(-50%);
  pointer-events: none;
}

.toast {
  max-width: 100%;
  margin: 0;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-left-width: 4px;
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  box-shadow: var(--shadow-md);
  overflow-wrap: anywhere;
  animation: toast-in var(--duration-base) var(--easing-standard);
}

.toast[data-tone="info"] {
  border-left-color: var(--color-accent);
}

.toast[data-tone="success"] {
  border-left-color: var(--color-success);
}

.toast[data-tone="error"] {
  border-left-color: var(--color-error);
}

.toast.is-leaving {
  animation: toast-out var(--duration-fast) var(--easing-standard) forwards;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes toast-out {
  from {
    opacity: 1;
    transform: none;
  }
  to {
    opacity: 0;
    transform: translateY(6px);
  }
}