:root{
  --orange-weak: #ffd8b5;
  --orange-border:#ffb377;
  --bg:#fff8f2;
}
html,body{
  height:100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
}
body{
  background: linear-gradient(180deg, var(--bg), #ffffff);
  /* 移动端安全区域处理 */
  @supports (padding: max(0px)) {
    padding-left: max(0px, env(safe-area-inset-left));
    padding-right: max(0px, env(safe-area-inset-right));
    padding-top: max(0px, env(safe-area-inset-top));
  }
}
/* 安全区域类 */
.pb-safe {
  padding-bottom: max(16px, env(safe-area-inset-bottom)) !important;
}
/* 移动设备优化 */
@media (max-width: 768px) {
  html, body {
    font-size: 16px; /* 防止iOS自动缩放 */
    -webkit-user-select: none;
    user-select: none;
  }
  button, input, textarea, select {
    -webkit-user-select: text;
    user-select: text;
  }
}
.chatbox{
  border: 1.5px solid var(--orange-border);
  background: rgba(255,255,255,0.85);
  box-shadow: 0 10px 30px rgba(0,0,0,0.06);
  border-radius: 18px;
}
.bubble{
  border: 1.2px solid var(--orange-weak);
  border-radius: 16px;
  padding: 12px 14px;
  background: #fff;
}
.bubble.assistant{background:#fff7ef;}
.bubble.user{background:#ffffff;}

/* 对话消息样式 */
.message-item {
  padding: 14px 16px;
  border-radius: 12px;
  margin-bottom: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.message-user {
  background: linear-gradient(135deg, #fef9f3 0%, #fdf5eb 100%);
  border: 2px solid #ffb347;
  border-left: 5px solid #ff8c00;
}

.message-assistant {
  background: linear-gradient(135deg, #f8fbfe 0%, #f3f8fd 100%);
  border: 2px solid #64b5f6;
  border-left: 5px solid #1976d2;
}

.message-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  font-size: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(0,0,0,0.08);
}

.role-badge {
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.message-user .role-badge {
  background: #ff9800;
  color: #fff;
  box-shadow: 0 1px 3px rgba(255,152,0,0.3);
}

.message-assistant .role-badge {
  background: #1976d2;
  color: #fff;
  box-shadow: 0 1px 3px rgba(25,118,210,0.3);
}

.msg-time {
  color: #666;
  font-size: 11px;
  font-weight: 500;
}

.message-content {
  color: #1a1a1a;
  line-height: 1.7;
  word-break: break-word;
  white-space: pre-wrap;
  font-size: 14px;
  padding: 4px 0;
}

.message-user .message-content {
  font-weight: 500;
}

/* Markdown 渲染样式 */
.message-content h1, .message-content h2, .message-content h3 {
  margin-top: 16px;
  margin-bottom: 8px;
  font-weight: bold;
}

.message-content h1 { font-size: 1.5em; }
.message-content h2 { font-size: 1.3em; }
.message-content h3 { font-size: 1.1em; }

.message-content p {
  margin: 8px 0;
}

.message-content ul, .message-content ol {
  margin: 8px 0;
  padding-left: 24px;
}

.message-content li {
  margin: 0;
  line-height: 1.6;
}

.message-content code {
  background: rgba(0,0,0,0.08);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 0.9em;
}

.message-content pre {
  background: #2d2d2d;
  border: 1px solid #444;
  border-radius: 6px;
  padding: 12px;
  overflow-x: auto;
  margin: 12px 0;
  color: #f8f8f2;
}

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

.message-content blockquote {
  border-left: 4px solid #ddd;
  padding-left: 12px;
  margin: 12px 0;
  color: #666;
  font-style: italic;
}

.message-content hr {
  border: none;
  border-top: 2px solid #ddd;
  margin: 16px 0;
}

.message-content a {
  color: #1976d2;
  text-decoration: underline;
}

.message-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 12px 0;
}

.message-content th, .message-content td {
  border: 1px solid #ddd;
  padding: 8px;
  text-align: left;
}

.message-content th {
  background: #f5f5f5;
  font-weight: bold;
}

.message-sources {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 2px dashed #64b5f6;
  font-size: 12px;
  color: #333;
  font-style: italic;
  background: rgba(144, 202, 249, 0.15);
  padding: 8px 10px;
  border-radius: 6px;
}

.source-list {
  list-style: none;
  padding: 0;
  margin: 6px 0 0 0;
}

.source-list li {
  padding: 4px 0;
  padding-left: 16px;
  position: relative;
}

.source-list li:before {
  content: "▪";
  position: absolute;
  left: 0;
  color: #1976d2;
  font-weight: bold;
}

.msg-time {
  color: #666;
  font-size: 11px;
  font-weight: 500;
  cursor: help;
}

/* ============ 移动响应式设计 ============ */
@media (max-width: 768px) {
  /* 全局移动优化 */
  * {
    -webkit-tap-highlight-color: transparent;
  }

  /* 按钮和交互元素：更大的点击区域 */
  button, input, textarea {
    min-height: 44px;
    min-width: 44px;
  }

  /* 头部响应式 */
  header {
    gap: 8px !important;
  }

  header div {
    font-size: 14px !important;
  }

  /* 布局容器：移动端选项卡式 */
  .layout-container {
    flex-direction: column !important;
    gap: 0 !important;
    display: flex !important;
    flex: 1 !important;
    overflow: hidden !important;
  }

  /* 移动端所有面板在桌面端显示，在移动端只显示对话面板 */
  .layout-section {
    min-width: auto !important;
    flex-basis: auto !important;
  }

  /* 移动端只显示对话区域 */
  [data-section="sessions"],
  [data-section="quiz"] {
    display: none !important;
  }

  [data-section="chat"] {
    display: flex !important;
    flex: 1 !important;
    flex-direction: column !important;
    min-height: 0 !important;
    max-height: 100% !important;
    overflow: hidden !important;
  }
  
  [data-section="chat"] .section-content {
    flex: 1 !important;
    display: flex !important;
    flex-direction: column !important;
    overflow: hidden !important;
    min-height: 0 !important;
  }
  
  [data-section="chat"] #chatArea {
    flex: 1 !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    margin-bottom: 8px !important;
  }

  .resize-handle {
    display: none !important;
  }

  /* 修改分界线样式 */
  .resize-handle {
    width: auto !important;
    height: 4px !important;
    cursor: row-resize !important;
  }

  /* 消息内容优化 */
  .message-content {
    font-size: 13px;
    line-height: 1.6;
  }

  .message-content h1 { font-size: 1.3em; }
  .message-content h2 { font-size: 1.1em; }
  .message-content h3 { font-size: 1em; }

  .message-content code {
    font-size: 0.85em;
  }

  .message-content pre {
    padding: 10px;
    font-size: 12px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* 输入框响应式 */
  textarea {
    font-size: 16px; /* 防止iOS自动缩放 */
    line-height: 1.5 !important;
    padding: 8px 12px !important;
  }

  /* 模态框：全屏显示 */
  .fixed.inset-0 {
    padding: 8px !important;
  }

  .chatbox {
    max-height: 90vh;
    border-radius: 12px;
  }
  
  .layout-section.chatbox {
    height: 100% !important;
    max-height: 100% !important;
    display: flex !important;
    flex-direction: column !important;
  }

  /* 弹框内容文本大小 */
  .chatbox .text-xl {
    font-size: 18px;
  }

  .chatbox .text-lg {
    font-size: 16px;
  }

  /* 表格响应式 */
  .message-content table {
    font-size: 12px;
    overflow-x: auto;
  }

  .message-content th, .message-content td {
    padding: 6px;
  }

  /* 列表间距 */
  .message-content ul, .message-content ol {
    margin: 8px 0 !important;
    padding-left: 20px !important;
  }

  .message-content li {
    margin: 4px 0 !important;
  }

  /* 按钮样式：移动端优化 */
  .text-orange-600,
  .text-orange-700 {
    font-size: 13px;
    padding: 4px 8px;
  }

  /* 修复移动端模态框显示 */
  #wrongModal,
  #authModal,
  #knowledgeBaseModal {
    padding: 8px !important;
    align-items: flex-end !important;
    justify-content: flex-end !important;
  }

  #wrongModal > div,
  #authModal > div,
  #knowledgeBaseModal > div {
    max-height: 90vh;
    width: 100%;
    border-radius: 12px 12px 0 0;
  }

  /* 错题本模态框 - 竖屏模式下堆叠 */
  .flex-col.sm\\:flex-row {
    flex-direction: column !important;
  }

  .flex-1.sm\\:flex-1,
  .flex-\\[2\\].sm\\:flex-\\[2\\] {
    flex: none !important;
    width: 100% !important;
  }

  /* 隐藏桌面特定文本 */
  .hidden.md\\:block {
    display: none !important;
  }

  /* 缩小字体预防溢出 */
  input[type="text"],
  input[type="password"],
  input[type="email"],
  textarea {
    font-size: 16px !important; /* iOS修复 */
  }

  /* 削减边距和填充 */
  .section-header {
    gap: 8px !important;
    margin-bottom: 8px !important;
  }

  .collapse-btn {
    width: 20px !important;
    height: 20px !important;
  }

  /* 移动端隐藏右侧面板按钮 */
  [data-toggle="quiz"],
  [data-toggle="sessions"] {
    display: none !important;
  }
}

/* 超小屏幕（<640px）额外优化 */
@media (max-width: 640px) {
  .chatbox {
    border-radius: 12px;
    padding: 12px !important;
  }

  .layout-container {
    padding: 0 !important;
  }

  header {
    flex-wrap: wrap;
    gap: 8px;
  }

  .section-header {
    font-size: 14px;
  }

  /* 进一步减小文本 */
  .message-content {
    font-size: 12px;
  }

  .message-header {
    gap: 4px !important;
    font-size: 10px;
  }

  .role-badge {
    font-size: 10px;
    padding: 2px 8px;
  }

  /* 触摸友好的间距 */
  button {
    padding: 10px 12px;
  }
}

/* 桌面端样式（> 768px） */
@media (min-width: 769px) {
  /* 隐藏移动端弹窗按钮 */
  #btnShowSessions,
  #btnShowQuiz {
    display: none !important;
  }

  /* 所有面板都显示 */
  .layout-section {
    display: flex !important;
  }

  [data-section="sessions"] {
    flex-basis: 180px !important;
  }

  [data-section="quiz"] {
    flex-basis: 200px !important;
  }

  .message-content {
    font-size: 13px;
  }
}