/* ========================================
   AI 对话界面 - Perplexity 风格美化
   ======================================== */

/* AI 主容器 */
.chat-container {
  display: flex !important;
  height: 100% !important;
  background: var(--cream-bg) !important;
}

/* 左侧对话列表 */
.chat-sidebar {
  width: 280px !important;
  background: var(--cream-surface) !important;
  border-right: 1px solid var(--border-color) !important;
  display: flex !important;
  flex-direction: column !important;
  flex-shrink: 0 !important;
}

.chat-sidebar-header {
  padding: 16px !important;
  border-bottom: 1px solid var(--border-color) !important;
}

.chat-sidebar-header .btn {
  width: 100% !important;
  padding: 12px !important;
  border-radius: 12px !important;
  background: linear-gradient(135deg, var(--teal-primary), var(--teal-dark)) !important;
  color: white !important;
  font-weight: 600 !important;
  transition: all 0.2s ease !important;
}

.chat-sidebar-header .btn:hover {
  transform: translateY(-2px) !important;
  box-shadow: 0 6px 20px rgba(32, 178, 170, 0.3) !important;
}

/* 对话列表 */
.chat-list {
  flex: 1 !important;
  overflow-y: auto !important;
  padding: 12px !important;
}

.chat-item {
  padding: 12px 16px !important;
  margin-bottom: 8px !important;
  border-radius: 12px !important;
  background: transparent !important;
  cursor: pointer !important;
  transition: all 0.2s ease !important;
  position: relative !important;
  border: 1px solid transparent !important;
}

.chat-item:hover {
  background: var(--teal-light) !important;
  border-color: var(--teal-primary) !important;
}

.chat-item.active {
  background: var(--teal-primary) !important;
  color: white !important;
}

.chat-item.pinned {
  background: rgba(255, 215, 0, 0.1) !important;
  border-color: rgba(255, 215, 0, 0.3) !important;
}

.chat-item-title {
  font-size: 0.9rem !important;
  font-weight: 500 !important;
  white-space: nowrap !important;
  overflow: hidden !important;
  text-overflow: ellipsis !important;
  margin-bottom: 4px !important;
}

.chat-item-actions {
  display: none !important;
  gap: 6px !important;
  margin-top: 8px !important;
}

.chat-item:hover .chat-item-actions {
  display: flex !important;
}

.chat-item-btn {
  padding: 4px 8px !important;
  border-radius: 6px !important;
  background: rgba(255, 255, 255, 0.2) !important;
  border: none !important;
  cursor: pointer !important;
  font-size: 0.8rem !important;
  transition: all 0.2s ease !important;
}

.chat-item-btn:hover {
  background: rgba(255, 255, 255, 0.4) !important;
  transform: scale(1.1) !important;
}

/* 右侧主对话区 */
.chat-main {
  flex: 1 !important;
  display: flex !important;
  flex-direction: column !important;
  background: var(--cream-bg) !important;
}

/* 顶部模型选择 */
.chat-header {
  padding: 16px 24px !important;
  background: var(--cream-surface) !important;
  border-bottom: 1px solid var(--border-color) !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  gap: 16px !important;
}

.chat-header select {
  padding: 8px 16px !important;
  border-radius: 12px !important;
  border: 1px solid var(--border-color) !important;
  background: var(--cream-bg) !important;
  color: var(--text-primary) !important;
  font-weight: 600 !important;
  font-size: 0.95rem !important;
  cursor: pointer !important;
  transition: all 0.2s ease !important;
}

.chat-header select:hover {
  border-color: var(--teal-primary) !important;
  box-shadow: 0 0 0 3px var(--teal-light) !important;
}

/* 消息区域 */
.chat-messages {
  flex: 1 !important;
  overflow-y: auto !important;
  padding: 24px !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 16px !important;
}

.msg {
  max-width: 80% !important;
  padding: 14px 18px !important;
  border-radius: 16px !important;
  line-height: 1.6 !important;
  animation: fadeInUp 0.3s ease !important;
}

.msg.user {
  align-self: flex-end !important;
  background: linear-gradient(135deg, var(--teal-primary), var(--teal-dark)) !important;
  color: white !important;
  border-radius: 16px 16px 4px 16px !important;
}

.msg.ai {
  align-self: flex-start !important;
  background: var(--cream-surface) !important;
  border: 1px solid var(--border-color) !important;
  color: var(--text-primary) !important;
  border-radius: 16px 16px 16px 4px !important;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 输入区域 */
.chat-input-wrapper {
  border-top: 1px solid var(--border-color) !important;
  background: var(--cream-surface) !important;
  padding: 16px 24px !important;
}

/* 选项行 */
.chat-options-row {
  display: flex !important;
  gap: 8px !important;
  margin-bottom: 12px !important;
  flex-wrap: wrap !important;
}

.checkbox-label {
  padding: 6px 14px !important;
  border-radius: 16px !important;
  background: var(--teal-light) !important;
  color: var(--teal-primary) !important;
  border: 1px solid transparent !important;
  font-size: 0.85rem !important;
  cursor: pointer !important;
  transition: all 0.2s ease !important;
}

.checkbox-label:hover {
  border-color: var(--teal-primary) !important;
}

.checkbox-label:has(input:checked) {
  background: var(--teal-primary) !important;
  color: white !important;
  font-weight: 600 !important;
}

/* 输入框区域 */
.chat-input-area {
  display: flex !important;
  gap: 12px !important;
  align-items: center !important;
  background: var(--cream-bg) !important;
  padding: 12px 16px !important;
  border-radius: 20px !important;
  border: 1px solid var(--border-color) !important;
  transition: all 0.2s ease !important;
}

.chat-input-area:focus-within {
  border-color: var(--teal-primary) !important;
  box-shadow: 0 0 0 3px var(--teal-light) !important;
}

.chat-input {
  flex: 1 !important;
  border: none !important;
  background: transparent !important;
  font-size: 0.95rem !important;
  color: var(--text-primary) !important;
  outline: none !important;
}

.chat-send {
  width: 40px !important;
  height: 40px !important;
  border-radius: 50% !important;
  background: var(--teal-primary) !important;
  color: white !important;
  border: none !important;
  cursor: pointer !important;
  font-size: 1.2rem !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  transition: all 0.2s ease !important;
}

.chat-send:hover {
  background: var(--teal-hover) !important;
  transform: scale(1.1) rotate(45deg) !important;
}

/* 附件预览 */
.attachment-preview {
  display: none !important;
  gap: 8px !important;
  margin-bottom: 12px !important;
  flex-wrap: wrap !important;
}

.attachment-preview.has-files {
  display: flex !important;
}

.preview-item {
  position: relative !important;
  width: 80px !important;
  height: 80px !important;
  border-radius: 12px !important;
  overflow: hidden !important;
  border: 1px solid var(--border-color) !important;
}

.preview-item img {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover !important;
}

.preview-close {
  position: absolute !important;
  top: 4px !important;
  right: 4px !important;
  width: 20px !important;
  height: 20px !important;
  border-radius: 50% !important;
  background: rgba(239, 68, 68, 0.9) !important;
  color: white !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  cursor: pointer !important;
  font-size: 0.8rem !important;
}

.preview-close:hover {
  background: #ef4444 !important;
}