/**
 * ConversationList 会话列表样式
 * 
 * 现代感设计（参考 Ant Design X Ultramodern）：
 * - 简洁清爽
 * - 柔和阴影
 * - 流畅过渡
 */

.conversation-list {
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 280px;
  background: #ffffff;
  border-right: 1px solid #e5e7eb;
}

/* 头部 */
.conversation-list-header {
  padding: 20px 16px;
  border-bottom: 1px solid #f3f4f6;
}

.conversation-list-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.conversation-list-logo .default-logo {
  font-size: 24px;
  color: #6366f1;
}

.conversation-list-title {
  font-size: 18px;
  font-weight: 600;
  color: #111827;
  letter-spacing: -0.02em;
}

/* 新建会话按钮 */
.conversation-list-new {
  padding: 12px 16px;
}

.new-conversation-btn {
  height: 44px;
  border-radius: 12px;
  border: 1px dashed #d1d5db;
  background: linear-gradient(135deg, #f9fafb 0%, #f3f4f6 100%);
  color: #6366f1;
  font-weight: 500;
  transition: all 0.3s ease;
}

.new-conversation-btn:hover {
  border-color: #6366f1;
  background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
  color: #4f46e5;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
}

/* 会话列表内容 */
.conversation-list-content {
  flex: 1;
  overflow-y: auto;
  padding: 8px 12px;
}

/* 分组标签 */
.conversation-group {
  margin-bottom: 16px;
}

.conversation-group-label {
  padding: 8px 4px;
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* 会话项 */
.conversation-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: 4px;
  position: relative;
}

.conversation-item:hover {
  background: #f9fafb;
}

.conversation-item.active {
  background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
}

.conversation-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 24px;
  background: #6366f1;
  border-radius: 0 3px 3px 0;
}

/* 会话图标 */
.conversation-item-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: #f3f4f6;
  color: #6b7280;
  font-size: 16px;
}

.conversation-item.active .conversation-item-icon {
  background: #6366f1;
  color: white;
}

.agent-icon {
  font-size: 20px;
}

/* 会话内容 */
.conversation-item-content {
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.conversation-item-title {
  font-size: 14px;
  font-weight: 500;
  color: #111827;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.4;
}

.conversation-item-preview {
  font-size: 12px;
  color: #6b7280;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 4px;
  line-height: 1.4;
}

/* 更多按钮 */
.conversation-item-more {
  opacity: 0;
  flex-shrink: 0;
  color: #9ca3af;
  transition: opacity 0.2s ease;
}

.conversation-item:hover .conversation-item-more {
  opacity: 1;
}

/* 空状态 */
.conversation-empty {
  padding: 40px 20px;
}

/* 滚动条 */
.conversation-list-content::-webkit-scrollbar {
  width: 6px;
}

.conversation-list-content::-webkit-scrollbar-track {
  background: transparent;
}

.conversation-list-content::-webkit-scrollbar-thumb {
  background: #e5e7eb;
  border-radius: 3px;
}

.conversation-list-content::-webkit-scrollbar-thumb:hover {
  background: #d1d5db;
}

/* 响应式 */
@media (max-width: 768px) {
  .conversation-list {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid #e5e7eb;
    max-height: 40vh;
  }
}