/* ===================================
   灵犀 AI - 聊天界面样式
   =================================== */

.chat-app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* === 侧边栏 === */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--color-bg-2);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition);
}

.sidebar-header {
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
}

.sidebar-logo .nav-logo-icon {
  width: 32px;
  height: 32px;
  font-size: 16px;
}

.new-chat-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  transition: all var(--transition);
}

.new-chat-btn:hover {
  background: rgba(99, 102, 241, 0.2);
  transform: rotate(90deg);
}

.chat-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.chat-list-item {
  padding: 12px 14px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 2px;
  position: relative;
}

.chat-list-item:hover {
  background: rgba(255, 255, 255, 0.05);
}

.chat-list-item.active {
  background: rgba(99, 102, 241, 0.1);
}

.chat-list-item .chat-icon {
  font-size: 16px;
  opacity: 0.6;
  flex-shrink: 0;
}

.chat-list-item .chat-title {
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

.chat-list-item .chat-delete {
  opacity: 0;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--color-text-muted);
  transition: all var(--transition);
  flex-shrink: 0;
}

.chat-list-item:hover .chat-delete {
  opacity: 1;
}

.chat-list-item .chat-delete:hover {
  background: rgba(239, 68, 68, 0.15);
  color: var(--color-danger);
}

.sidebar-footer {
  padding: 12px;
  border-top: 1px solid var(--color-border);
}

.settings-btn {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.settings-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
}

.settings-btn .icon {
  font-size: 18px;
}

/* === 侧边栏底部 === */
.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.contact-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: 13px;
  transition: all var(--transition);
}

.contact-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
}

.contact-btn .icon {
  font-size: 16px;
}

.settings-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: 13px;
  transition: all var(--transition);
}

.settings-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
}

.settings-btn .icon {
  font-size: 16px;
}

/* === 主聊天区 === */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

.chat-header {
  height: 56px;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
  background: rgba(10, 10, 15, 0.6);
  backdrop-filter: blur(10px);
  z-index: 5;
}

.chat-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.chat-header-mascot {
  width: 32px;
  height: 32px;
}

.chat-header-title {
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.chat-header-title .status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
}

.chat-header-actions {
  display: flex;
  gap: 8px;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
}

.sidebar-toggle {
  display: none;
}

/* 消息区域 */
.messages-container {
  flex: 1;
  overflow-y: auto;
  scroll-behavior: smooth;
}

.messages-inner {
  max-width: 820px;
  margin: 0 auto;
  padding: 24px 20px 120px;
}

/* 拖拽上传遮罩 */
.drag-overlay {
  position: absolute;
  inset: 0;
  background: rgba(99, 102, 241, 0.08);
  backdrop-filter: blur(4px);
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition);
}

.drag-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.drag-overlay-content {
  text-align: center;
  padding: 40px 60px;
  border: 2px dashed var(--color-primary);
  border-radius: var(--radius-xl);
  background: rgba(22, 22, 35, 0.8);
}

.drag-overlay-content .icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.drag-overlay-content .text {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
}

.drag-overlay-content .hint {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 6px;
}

/* 欢迎页 */
.welcome-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100%;
  text-align: center;
  padding: 40px 20px;
}

.welcome-mascot {
  margin-bottom: 24px;
}

.welcome-screen h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.welcome-screen p {
  color: var(--color-text-muted);
  margin-bottom: 32px;
}

.suggestion-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  width: 100%;
  max-width: 560px;
}

.suggestion-card {
  padding: 16px 20px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: left;
  cursor: pointer;
  transition: all var(--transition);
}

.suggestion-card:hover {
  background: var(--color-card-hover);
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-2px);
}

.suggestion-card .suggestion-icon {
  font-size: 22px;
  margin-bottom: 8px;
}

.suggestion-card .suggestion-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.suggestion-card .suggestion-desc {
  font-size: 12px;
  color: var(--color-text-muted);
}

/* 消息气泡 */
.message {
  display: flex;
  gap: 14px;
  margin-bottom: 24px;
  animation: fadeInUp 0.4s forwards;
}

.message-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.message-avatar.ai {
  background: var(--gradient-brand);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
  position: relative;
  overflow: hidden;
}

.message-avatar.ai::after {
  content: '';
  position: absolute;
  inset: 2px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(255,255,255,0.4), transparent 60%);
}

.message-avatar.user {
  background: var(--color-card);
  border: 1px solid var(--color-border);
}

.message-content {
  flex: 1;
  min-width: 0;
}

.message-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.message-bubble {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  word-wrap: break-word;
}

.message-bubble p {
  margin-bottom: 8px;
}

.message-bubble p:last-child {
  margin-bottom: 0;
}

.message-bubble code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
}

.message-bubble pre {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  overflow-x: auto;
  margin: 8px 0;
}

.message-bubble pre code {
  background: none;
  padding: 0;
}

.message-bubble ul,
.message-bubble ol {
  padding-left: 20px;
  margin: 8px 0;
}

.message-bubble li {
  margin-bottom: 4px;
}

.message-bubble strong {
  font-weight: 700;
}

/* 消息中的图片 */
.message-images {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.message-image-thumb {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: transform var(--transition);
}

.message-image-thumb:hover {
  transform: scale(1.05);
}

.message-actions {
  display: flex;
  gap: 4px;
  margin-top: 8px;
  opacity: 0;
  transition: opacity var(--transition);
}

.message:hover .message-actions {
  opacity: 1;
}

.message-action-btn {
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: all var(--transition);
}

.message-action-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
}

/* 思考中动画 */
.thinking-indicator {
  display: flex;
  gap: 14px;
  margin-bottom: 24px;
  animation: fadeIn 0.3s forwards;
}

.thinking-bubble {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 12px 16px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.thinking-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-text-muted);
  animation: thinkingBounce 1.4s infinite;
}

.thinking-dot:nth-child(2) { animation-delay: 0.2s; }
.thinking-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes thinkingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-8px); opacity: 1; }
}

/* 打字光标 */
.typing-cursor {
  display: inline-block;
  width: 2px;
  height: 18px;
  background: var(--color-primary);
  margin-left: 2px;
  animation: blink 1s infinite;
  vertical-align: text-bottom;
}

/* === 输入区 === */
.input-area {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px 20px 20px;
  background: linear-gradient(to top, var(--color-bg) 60%, transparent);
  z-index: 5;
}

.input-wrapper {
  max-width: 820px;
  margin: 0 auto;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color var(--transition);
}

.input-wrapper:focus-within {
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* 通用预览区（图片+文件） */
.preview-area {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 4px 4px 0;
}

.preview-area:empty {
  display: none;
}

.preview-item {
  position: relative;
}

/* 图片预览 */
.preview-item.image-preview-item {
  width: 72px;
  height: 72px;
}

.preview-item.image-preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.preview-remove {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-danger);
  color: #fff;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform var(--transition);
  z-index: 2;
}

.preview-remove:hover {
  transform: scale(1.2);
}

/* 文件预览卡片 */
.preview-item.file-preview-item {
  height: 72px;
}

.file-card {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  height: 100%;
  min-width: 140px;
  max-width: 200px;
}

.file-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.file-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.file-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 120px;
}

.file-size {
  font-size: 11px;
  color: var(--color-text-muted);
}

/* 消息中的文件卡片 */
.message-files {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.message-file-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: background var(--transition);
}

.message-file-card:hover {
  background: rgba(255, 255, 255, 0.08);
}

.message-file-icon {
  font-size: 22px;
  flex-shrink: 0;
}

.message-file-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.message-file-name {
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 160px;
}

.message-file-size {
  font-size: 11px;
  color: var(--color-text-muted);
}

/* 输入行 */
.input-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

.input-tools {
  display: flex;
  gap: 4px;
}

.input-tool-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.input-tool-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
}

.input-tool-btn.active {
  background: rgba(99, 102, 241, 0.15);
  color: var(--color-primary);
}

#messageInput {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--color-text);
  font-size: 15px;
  font-family: inherit;
  resize: none;
  max-height: 120px;
  line-height: 1.6;
  padding: 8px 4px;
}

#messageInput::placeholder {
  color: var(--color-text-muted);
}

.send-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--gradient-brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: all var(--transition);
  flex-shrink: 0;
}

.send-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.input-hint {
  text-align: center;
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 8px;
}

/* 图片放大查看 */
.image-lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.image-lightbox.active {
  opacity: 1;
  visibility: visible;
}

.image-lightbox img {
  max-width: 90%;
  max-height: 90%;
  border-radius: var(--radius-md);
}

.image-lightbox .close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* === 设置弹窗 === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  width: 90%;
  max-width: 480px;
  max-height: 85vh;
  overflow-y: auto;
  transform: scale(0.95);
  transition: transform var(--transition);
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
  font-size: 1.2rem;
  font-weight: 700;
}

.modal-body {
  padding: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
}

.form-group label .hint {
  font-weight: 400;
  color: var(--color-text-muted);
  font-size: 12px;
  margin-left: 6px;
}

.form-group .hint {
  font-weight: 400;
  color: var(--color-text-muted);
  font-size: 12px;
  margin-top: 6px;
  line-height: 1.5;
}

/* 自定义 API 开关 */
.switch-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  margin-bottom: 0;
}

.switch-label input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--color-primary);
  cursor: pointer;
  flex-shrink: 0;
}

.switch-label span {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: rgba(99, 102, 241, 0.4);
}

.form-group textarea {
  resize: vertical;
  min-height: 60px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* 移动端 */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 50;
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-toggle {
    display: flex;
  }

  .suggestion-grid {
    grid-template-columns: 1fr;
  }

  .messages-inner {
    padding: 16px 12px 120px;
  }
}