/* ========================================
   Feedback Components
   Toast, Alert, Spinner, Skeleton, Empty State, Progress, Result
   ======================================== */

/* ----------------------------------------
   Toast 通知 (Style 0: 浅色填充 + 边框)
   ---------------------------------------- */
.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid;
  max-width: 400px;
  position: relative;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.toast-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold, 600);
  color: var(--color-black);
  margin-bottom: 2px;
}

.toast-message {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  line-height: 1.5;
}

.toast-close {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
  cursor: pointer;
  background: none;
  border: none;
  flex-shrink: 0;
  transition: color var(--transition-fast);
}

.toast-close:hover {
  color: var(--color-black);
}

/* Toast 变体 - 浅色填充背景 */
.toast--success {
  background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
  border-color: #a7f3d0;
}
.toast--success .toast-icon { color: #059669; }

.toast--error {
  background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
  border-color: #fecaca;
}
.toast--error .toast-icon { color: #dc2626; }

.toast--warning {
  background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
  border-color: #fde68a;
}
.toast--warning .toast-icon { color: #d97706; }

.toast--info {
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
  border-color: #bfdbfe;
}
.toast--info .toast-icon { color: #2563eb; }

/* Toast 容器 */
.toast-container {
  position: fixed;
  z-index: 10001;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
  /* Safe area support */
  padding-top: env(safe-area-inset-top);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

.toast-container > * {
  pointer-events: auto;
}

.toast-container--top-left {
  top: var(--space-4);
  left: var(--space-4);
}

.toast-container--top-right {
  top: var(--space-4);
  right: var(--space-4);
}

.toast-container--top-center {
  top: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
}

.toast-container--bottom-right {
  bottom: var(--space-4);
  right: var(--space-4);
}

.toast-container--bottom-center {
  bottom: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
}

/* ----------------------------------------
   Alert 警告框
   ---------------------------------------- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
}

.alert-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: var(--font-medium);
  margin-bottom: var(--space-1);
}

.alert--success {
  background: rgba(74, 124, 89, 0.1);
  color: var(--color-success, #4A7C59);
}

.alert--error {
  background: rgba(196, 69, 54, 0.1);
  color: var(--color-error, #C44536);
}

.alert--warning {
  background: rgba(212, 160, 58, 0.1);
  color: var(--color-warning, #D4A03A);
}

.alert--info {
  background: rgba(74, 111, 165, 0.1);
  color: var(--color-info, #4A6FA5);
}

/* ----------------------------------------
   Spinner 加载动画
   ---------------------------------------- */
.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--color-gray-200);
  border-top-color: var(--color-gold, #B8860B);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner--sm { width: 16px; height: 16px; }
.spinner--lg { width: 40px; height: 40px; border-width: 3px; }
.spinner--xl { width: 56px; height: 56px; border-width: 4px; }

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 加载状态容器 */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12);
  gap: var(--space-4);
}

.loading-state-text {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

/* ----------------------------------------
   Skeleton 骨架屏
   ---------------------------------------- */
.skeleton {
  background: linear-gradient(90deg, var(--color-gray-200) 25%, var(--color-gray-100) 50%, var(--color-gray-200) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

.skeleton--text {
  height: 1em;
  margin-bottom: var(--space-2);
}

.skeleton--title {
  height: 1.5em;
  width: 60%;
  margin-bottom: var(--space-3);
}

.skeleton--avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
}

.skeleton--image {
  aspect-ratio: 1;
}

.skeleton--button {
  height: 44px;
  width: 120px;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* 产品卡片骨架 */
.skeleton-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding: 0;
}

.skeleton-card-image {
  aspect-ratio: 1;
  background: linear-gradient(90deg, var(--color-gray-200) 25%, var(--color-gray-100) 50%, var(--color-gray-200) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

.skeleton-card-body {
  padding: var(--space-5);
}

/* ----------------------------------------
   Empty State 空状态
   ---------------------------------------- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-16) var(--space-8);
}

.empty-state-icon {
  width: 80px;
  height: 80px;
  margin-bottom: var(--space-6);
  color: var(--color-gray-300);
}

.empty-state-title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
  color: var(--color-black);
}

.empty-state-message {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  max-width: 300px;
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

/* ----------------------------------------
   Progress 进度条
   ---------------------------------------- */
.progress {
  height: 8px;
  background: var(--color-gray-200);
  border-radius: var(--radius-full, 9999px);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--color-gold, #B8860B);
  border-radius: var(--radius-full, 9999px);
  transition: width var(--transition-base, 0.3s ease);
}

.progress--sm { height: 4px; }
.progress--lg { height: 12px; }

/* Progress Steps 进度步骤 */
.progress-steps {
  display: flex;
  justify-content: space-between;
  position: relative;
}

.progress-steps::before {
  content: '';
  position: absolute;
  top: 14px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-gray-200);
}

.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  position: relative;
  z-index: 1;
}

.progress-step-circle {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 2px solid var(--color-gray-300);
  background: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-400);
}

.progress-step--completed .progress-step-circle {
  border-color: var(--color-gold, #B8860B);
  background: var(--color-gold, #B8860B);
  color: var(--color-white);
}

.progress-step--active .progress-step-circle {
  border-color: var(--color-gold, #B8860B);
  color: var(--color-gold, #B8860B);
}

.progress-step-label {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

.progress-step--completed .progress-step-label,
.progress-step--active .progress-step-label {
  color: var(--color-gold, #B8860B);
}

/* ----------------------------------------
   Result 结果页面
   ---------------------------------------- */
.result {
  text-align: center;
  padding: var(--space-12) var(--space-8);
}

.result-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-6);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.result-icon--success {
  background: rgba(74, 124, 89, 0.1);
  color: var(--color-success, #4A7C59);
}

.result-icon--error {
  background: rgba(196, 69, 54, 0.1);
  color: var(--color-error, #C44536);
}

.result-title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  margin-bottom: var(--space-3);
}

.result-message {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  max-width: 400px;
  margin: 0 auto var(--space-8);
  line-height: 1.8;
}

.result-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
}

/* ----------------------------------------
   响应式设计
   ---------------------------------------- */
@media (max-width: 768px) {
  /* 移动端 toast 宽度适配屏幕（左右各8px边距） */
  .toast-container .toast {
    max-width: calc(100vw - var(--space-4));
    width: calc(100vw - var(--space-4));
  }

  /* 移动端 toast 显示在底部中间 */
  .toast-container--top-left,
  .toast-container--top-right,
  .toast-container--top-center {
    top: auto;
    bottom: var(--space-4);
    left: 50%;
    right: auto;
    transform: translateX(-50%);
  }

  .toast-container--bottom-right {
    left: 50%;
    right: auto;
    transform: translateX(-50%);
  }

  .empty-state {
    padding: var(--space-12) var(--space-4);
  }

  .result {
    padding: var(--space-8) var(--space-4);
  }

  .result-actions {
    flex-direction: column;
  }

  .progress-step-label {
    font-size: 10px;
  }
}