/* 全局样式 */
:root {
  --primary-color: #4361ee;
  --primary-light: #5a75f0;
  --primary-dark: #334fd8;
  --secondary-color: #3f37c9;
  --accent-color: #4895ef;
  --bg-color: #f8f9fa;
  --sidebar-bg: #2b2d42;
  --text-color: #2b2d42;
  --text-light: #8d99ae;
  --white: #ffffff;
  --gray: #edf2f4;
  --danger: #e63946;
  --success: #4cc9f0;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --radius: 8px;
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
}

/* 布局容器 */
.app-container {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* 侧边栏logo样式 */
.sidebar-logo {
  width: 24px; /* 与原图标大小一致，可根据需要调整 */
  height: 24px;
  border-radius: 4px; /* 轻微圆角，可选 */
  object-fit: cover; /* 保证图片不变形 */
  margin-right: 10px; /* 与文字的间距，和原图标一致 */
  vertical-align: middle; /* 垂直居中对齐 */
}

.mid-logo {
  width: 120px; /* 与原图标大小一致，可根据需要调整 */
  height: 120px;
  border-radius: 4px; /* 轻微圆角，可选 */
  object-fit: cover; /* 保证图片不变形 */
  margin-right: 10px; /* 与文字的间距，和原图标一致 */
  vertical-align: middle; /* 垂直居中对齐 */
}

/* 侧边栏 */
.sidebar {
  width: 280px;
  background-color: var(--sidebar-bg);
  color: var(--white);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow: var(--shadow);
  z-index: 10;
}

.sidebar-header {
  display: flex;
  flex-direction: column;
  gap: 15px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  color: var(--success);
}

.history-container {
  flex: 1;
  overflow-y: auto;
}

.history-container h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 15px;
  font-size: 1rem;
  color: var(--text-light);
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.history-item {
  padding: 10px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.history-item:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.sidebar-footer {
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 主内容区 */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  /* 新增：为页脚预留空间 */
  padding-bottom: 60px;
}

.chat-container {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
  background-color: var(--white);
}

.welcome-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 15px;
  color: var(--text-light);
}

.welcome-message i {
  font-size: 3rem;
  color: var(--primary-color);
}

/* 消息气泡 */
.message {
  display: flex;
  gap: 15px;
  max-width: 80%;
  animation: fadeIn 0.3s ease;
}

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

.message.user {
  align-self: flex-end;
}

.message.assistant {
  align-self: flex-start;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.message-content {
  padding: 15px;
  border-radius: var(--radius);
  background-color: var(--gray);
  flex: 1;
}

.user .message-content {
  background-color: var(--primary-color);
  color: var(--white);
}

.assistant .message-content {
  background-color: var(--gray);
  color: var(--text-color);
}

.media-attachment {
  margin-top: 10px;
  border-radius: var(--radius);
  overflow: hidden;
}

.media-attachment img,
.media-attachment video {
  max-width: 300px;
  max-height: 300px;
  border-radius: var(--radius);
}

/* 输入区域 */
.input-container {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding: 20px;
  background-color: var(--white);
  border-top: 1px solid var(--gray);
  /* 新增：避免被页脚遮挡 */
  position: relative;
  z-index: 1;
}

.media-upload {
  display: flex;
  align-items: center;
  gap: 10px;
}

.upload-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--gray);
  color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.upload-btn:hover {
  background-color: var(--primary-color);
  color: var(--white);
}

.media-preview {
  display: flex;
  gap: 5px;
  overflow-x: auto;
  max-width: 200px;
}

.preview-item {
  position: relative;
  width: 60px;
  height: 60px;
  border-radius: var(--radius);
  overflow: hidden;
}

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

.preview-remove {
  position: absolute;
  top: -5px;
  right: -5px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: var(--danger);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.8rem;
}

#message-input {
  flex: 1;
  padding: 12px 15px;
  border: 1px solid var(--gray);
  border-radius: var(--radius);
  resize: none;
  outline: none;
  transition: var(--transition);
  font-size: 1rem;
}

#message-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.2);
}

/* 按钮样式 */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.primary-btn {
  background-color: var(--primary-color);
  color: var(--white);
}

.primary-btn:hover {
  background-color: var(--primary-dark);
}

.secondary-btn {
  background-color: transparent;
  color: var(--white);
  border: 1px solid var(--text-light);
}

.secondary-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.send-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: var(--white);
  flex-shrink: 0;
}

.send-btn:hover {
  background-color: var(--primary-dark);
}

/* 模态框 */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

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

.modal-content {
  width: 90%;
  max-width: 500px;
  background-color: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transform: scale(0.9);
  transition: var(--transition);
}

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

.modal-header {
  padding: 15px 20px;
  background-color: var(--primary-color);
  color: var(--white);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.close-btn {
  background: transparent;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
}

.modal-body {
  padding: 20px;
}

.form-group {
  margin-bottom: 15px;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 10px 15px;
  border: 1px solid var(--gray);
  border-radius: var(--radius);
  outline: none;
}

.form-group input:focus {
  border-color: var(--primary-color);
}

.modal-footer {
  padding: 15px 20px;
  background-color: var(--gray);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* 加载遮罩 */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}

.loading-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  color: var(--white);
  font-size: 1.2rem;
}

.loading-spinner i {
  font-size: 2rem;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hidden {
  display: none;
}

/* Markdown样式 */
.markdown-content h1,
.markdown-content h2,
.markdown-content h3 {
  margin: 10px 0;
}

.markdown-content p {
  margin: 5px 0;
}

.markdown-content code {
  padding: 2px 4px;
  background-color: rgba(0, 0, 0, 0.1);
  border-radius: 4px;
}

.markdown-content pre {
  padding: 10px;
  background-color: #2d2d2d;
  color: #fff;
  border-radius: 4px;
  overflow-x: auto;
  margin: 10px 0;
}

.markdown-content img {
  max-width: 100%;
  border-radius: 4px;
}

.markdown-content ul,
.markdown-content ol {
  margin-left: 20px;
  margin-bottom: 10px;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .sidebar {
    width: 250px;
  }

  .message {
    max-width: 90%;
  }

  /* 响应式：调整主内容区页脚间距 */
  .main-content {
    padding-bottom: 70px;
  }

  /* 响应式：页脚样式适配 */
  .sys-footer {
    padding: 8px 15px;
    font-size: 12px;
  }
}

@media (max-width: 576px) {
  .app-container {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    height: 200px;
  }

  .input-container {
    padding: 10px;
  }

  /* 响应式：移动端页脚适配 */
  .main-content {
    padding-bottom: 80px;
  }

  .sys-footer {
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    text-align: center;
  }
}

/* 视频加载中样式 */
.preview-item .fa-spinner {
  color: var(--primary-color);
  font-size: 1.2rem;
}

/* 修复canvas绘制的视频帧样式 */
.media-attachment img[src*="data:image/jpeg;base64"] {
  background-color: #ffffff;
  border: 1px solid var(--gray);
}

/* 新增：页脚样式（与原系统完全适配） */
.sys-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 60px;
  background-color: var(--sidebar-bg);
  color: var(--text-light);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  z-index: 5;
  font-size: 14px;
}

.sys-footer .footer-mid {
  display: flex;
  align-items: center;
  gap: 8px;
}
.sys-footer .footer-left {
  display: flex;
  align-items: center;
  gap: 8px;
}
.sys-footer .footer-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sys-footer i {
  color: var(--success);
}

.sys-footer a {
  color: var(--success);
  text-decoration: none;
  transition: var(--transition);
}

.sys-footer a:hover {
  color: var(--white);
  text-decoration: underline;
}

.sys-footer .developer-name {
  color: var(--white);
  font-weight: 500;
}