/* ============================================================
   toast.css — Phase U.3: Toast Notification System
   Uses design tokens from tokens.css
   Position: top-right desktop · bottom-center mobile
   ============================================================ */

#toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
  max-width: 360px;
  width: calc(100vw - 2 * var(--space-4));
}

.toast {
  pointer-events: auto;
  background: var(--color-surface);
  border-left: 4px solid var(--color-gray-500);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  min-height: 48px;
  animation: toast-in var(--transition-base) var(--easing-spring);
  cursor: pointer;
}
.toast.is-leaving {
  animation: toast-out var(--transition-fast) ease forwards;
}

@keyframes toast-in {
  from { transform: translateX(20px); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}
@keyframes toast-out {
  from { transform: translateX(0);    opacity: 1; }
  to   { transform: translateX(20px); opacity: 0; }
}

.toast-icon {
  font-size: var(--text-lg);
  line-height: 1;
  flex-shrink: 0;
  margin-top: 2px;
}
.toast-body {
  flex: 1;
  min-width: 0;
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: var(--leading-normal);
  word-break: break-word;
}
.toast-title {
  font-weight: var(--weight-semi);
  color: var(--color-heading);
  margin-bottom: 2px;
}
.toast-close {
  background: none;
  border: 0;
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  cursor: pointer;
  line-height: 1;
  padding: 0 var(--space-1);
  flex-shrink: 0;
  transition: color var(--transition-fast);
}
.toast-close:hover { color: var(--color-text); }

/* Variants */
.toast.success { border-left-color: var(--color-success); }
.toast.success .toast-icon { color: var(--color-success); }

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

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

.toast.info { border-left-color: var(--color-info); }
.toast.info .toast-icon { color: var(--color-info); }

/* Mobile — bottom-center */
@media (max-width: 600px) {
  #toast-container {
    top: auto;
    bottom: var(--space-4);
    right: var(--space-2);
    left: var(--space-2);
    width: auto;
    max-width: none;
  }
  .toast { animation: toast-in-mobile var(--transition-base) var(--easing-spring); }
  @keyframes toast-in-mobile {
    from { transform: translateY(20px); opacity: 0; }
    to   { transform: translateY(0);    opacity: 1; }
  }
}

@media (prefers-reduced-motion: reduce) {
  .toast, .toast.is-leaving {
    animation-duration: 0.01ms !important;
  }
}