/* ==========================================================================
   MODERN NOTIFICATION SYSTEM
   ========================================================================== */

/* Notification Container */
.notification-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: 400px;
  width: 100%;
}

/* Individual Notification */
.notification {
  background: var(--color-surface-elevated);
  border: var(--border-width-thin) solid var(--color-border-light);
  border-radius: var(--border-radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  position: relative;
  pointer-events: auto;
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
  transform: translateX(100%);
  opacity: 0;
  animation: slideInNotification 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  max-width: 100%;
  word-wrap: break-word;
}

.notification.removing {
  animation: slideOutNotification 0.25s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* Notification Icon */
.notification-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  margin-top: 1px;
}

/* Notification Content */
.notification-content {
  flex: 1;
  min-width: 0;
}

.notification-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-1) 0;
  line-height: var(--line-height-tight);
}

.notification-message {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: 0;
  line-height: var(--line-height-normal);
  word-break: break-word;
}

/* Notification Actions */
.notification-body {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.notification-actions {
  margin-top: 0;
  display: flex;
  gap: var(--space-2);
}

.notification-action {
  appearance: none;
  border: var(--border-width-thin) solid var(--color-border-light);
  background: var(--color-gray-50);
  color: var(--color-text-primary);
  font-size: var(--font-size-xs);
  padding: calc(var(--space-1) + 2px) var(--space-3);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.notification-action i {
  font-size: 0.9em;
  margin-right: var(--space-2);
  color: var(--color-text-secondary);
}

.notification-action:hover {
  background: var(--color-gray-100);
}

.notification-action:active {
  background: var(--color-gray-200);
}

.notification-action:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-primary-translucent, rgba(59, 130, 246, 0.35));
  border-color: var(--color-primary);
}

/* Close Button */
.notification-close {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  background: none;
  border: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  font-size: var(--font-size-xs);
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.notification-close:hover {
  background: var(--color-gray-100);
  color: var(--color-text-secondary);
  transform: rotate(90deg);
}

.notification-close:active {
  transform: rotate(90deg) scale(0.95);
}

/* Progress Bar */
.notification-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--color-gray-200);
  border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
  overflow: hidden;
}

.notification-progress-bar {
  height: 100%;
  background: var(--color-primary);
  width: 100%;
  transform-origin: left;
  animation: progressCountdown linear;
}

/* Notification Types */
.notification.success {
  border-left: 4px solid var(--color-success);
}

.notification.success .notification-icon {
  background: var(--color-success-light);
  color: var(--color-success);
}

.notification.success .notification-progress-bar {
  background: var(--color-success);
}

.notification.error {
  border-left: 4px solid var(--color-error);
}

.notification.error .notification-icon {
  background: var(--color-error-light);
  color: var(--color-error);
}

.notification.error .notification-progress-bar {
  background: var(--color-error);
}

.notification.warning {
  border-left: 4px solid var(--color-warning);
}

.notification.warning .notification-icon {
  background: var(--color-warning-light);
  color: var(--color-warning);
}

.notification.warning .notification-progress-bar {
  background: var(--color-warning);
}

.notification.info {
  border-left: 4px solid var(--color-info);
}

.notification.info .notification-icon {
  background: var(--color-info-light);
  color: var(--color-info);
}

.notification.info .notification-progress-bar {
  background: var(--color-info);
}

/* Animations */
@keyframes slideInNotification {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOutNotification {
  from {
    transform: translateX(0) scale(1);
    opacity: 1;
    max-height: 200px;
    margin-bottom: var(--space-2);
  }
  to {
    transform: translateX(100%) scale(0.95);
    opacity: 0;
    max-height: 0;
    margin-bottom: 0;
    padding-top: 0;
    padding-bottom: 0;
  }
}

@keyframes progressCountdown {
  from {
    transform: scaleX(1);
  }
  to {
    transform: scaleX(0);
  }
}

/* Hover Effects */
.notification:hover {
  transform: translateX(-2px);
  box-shadow: var(--shadow-xl);
}

.notification:hover .notification-progress-bar {
  animation-play-state: paused;
}

/* Responsive Design */
@media (max-width: 768px) {
  .notification-container {
    top: var(--space-3);
    right: var(--space-3);
    left: var(--space-3);
    max-width: none;
  }
  
  .notification {
    padding: var(--space-3);
  }
  
  .notification-title {
    font-size: var(--font-size-xs);
  }
  
  .notification-message {
    font-size: var(--font-size-xs);
  }
}

/* Dark theme support (if needed later) */
@media (prefers-color-scheme: dark) {
  .notification {
    background: var(--color-gray-800);
    border-color: var(--color-gray-700);
    color: var(--color-white);
  }
  
  .notification-title {
    color: var(--color-white);
  }
  
  .notification-message {
    color: var(--color-gray-300);
  }
  
  .notification-close {
    color: var(--color-gray-400);
  }
  
  .notification-close:hover {
    background: var(--color-gray-700);
    color: var(--color-gray-200);
  }
}

/* App theme attribute: keep Undo action light in dark theme */
:root[data-theme='dark'] .notification-action {
  background: var(--color-gray-200);
  border-color: var(--color-gray-300);
  color: var(--color-gray-900);
}

:root[data-theme='dark'] .notification-action i {
  color: var(--color-gray-700);
}

:root[data-theme='dark'] .notification-action:hover {
  background: var(--color-gray-300);
  color: var(--color-gray-900);
}