* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'IBM Plex Mono', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
  background: #ffffff;
  color: #222;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ======================
   Main Layout
   ====================== */
.main-area {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}

.main-content {
  flex: 7;
  display: flex;
  overflow: hidden;
}

/* ======================
   Code Panel (Left)
   ====================== */
.code-panel {
  flex: 0 0 33.3333%;
  padding: 16px;
  background: #fafafa;
  border-right: 1px solid #eee;
  display: flex;
  flex-direction: column;
  gap: 16px; /* 代码区与上传区间距 */
}

.panel-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 0; /* 由 gap 控制间距 */
  color: #2c3e50;
}

/* CodeMirror 容器占满剩余空间 */
#code-editor {
  flex: 1;
  min-height: 0; /* 防止 flex 溢出 */
}

/* CodeMirror 样式匹配参考页面 */
.CodeMirror {
  height: 100% !important;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  line-height: 1.5;
  background: #f8f9fa;
}

.CodeMirror-gutters {
  background: #e9ecef !important;
  border-right: 1px solid #dee2e6 !important;
}

.CodeMirror-linenumber {
  color: #6c757d !important;
  padding-right: 8px !important;
  font-family: 'IBM Plex Mono', monospace !important;
  font-size: 13px !important;
}

/* Upload Section */
.upload-section {
  flex: 0; /* 默认不占空间 */
  padding: 12px;
  background: #f8f9fa;
  border: 1px solid #ddd;
  border-radius: 6px;
  display: none;
  flex-direction: column;
  gap: 10px;
}

.upload-section.active {
  display: flex;
  flex: 0 0 auto; /* 显示时占用固定高度 */
}

.upload-section label {
  font-weight: 500;
  color: #495057;
  margin-bottom: 8px;
}

.upload-section input[type="file"] {
  margin-bottom: 8px;
}

.preview {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.preview img {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border: 1px solid #ddd;
  border-radius: 4px;
}

/* ======================
   Right Panel
   ====================== */
.right-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 16px;
  overflow: hidden;
}

/*.visualization-area {*/
/*  flex: 3;*/
/*  background: #f9f9f9;*/
/*  border: 1px solid #ddd;*/
/*  border-radius: 6px;*/
/*  padding: 12px;*/
/*  overflow-y: auto;*/
/*  min-height: 400px;*/
/*}*/

.visualization-area {
  flex: 3;
  background: #f9f9f9;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 12px;
  overflow: hidden; /* ← 关键：禁用滚动，让子元素控制 */
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.console-output {
  flex: 1;
  background: #f9f9f9;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 12px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  overflow-y: auto;
  white-space: pre-wrap;
  margin-top: 16px;
}

/* ======================
   Control Panel
   ====================== */
.control-panel {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: #f8f9fa;
  border-top: 1px solid #e0e0e0;
  gap: 16px;
}

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

.button-group {
  display: flex;
  gap: 8px;
  align-items: center;
}

/*.btn {*/
/*  padding: 8px 16px;*/
/*  background: #0d6efd;*/
/*  color: white;*/
/*  border: none;*/
/*  border-radius: 6px;*/
/*  cursor: pointer;*/
/*  font-weight: 500;*/
/*  font-size: 14px;*/
/*}*/

/*.btn:hover {*/
/*  background: #0b5ed7;*/
/*}*/

.btn-secondary {
  background: #6c757d;
}

.btn-secondary:hover {
  background: #5c636a;
}

.btn {
  padding: 8px 16px;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
  font-size: 14px;
  transition: background 0.2s ease;
}

/* =============== 三组颜色 =============== */

/* PyTorch 基础：蓝色系（官方色） */
.btn-pytorch {
  background: #EE4C2C; /* PyTorch 官方红橙色 */
}
.btn-pytorch:hover {
  background: #d94225;
}

/* CNN：绿色系（代表视觉/图像） */
.btn-cnn {
  background: #2E8B57; /* 海绿色，清爽视觉感 */
}
.btn-cnn:hover {
  background: #257347;
}

/* LM / Transformer：紫色系（代表 NLP / 高级模型） */
.btn-lm {
  background: #6A5ACD; /* 石板蓝/紫罗兰色，常用于 NLP */
}
.btn-lm:hover {
  background: #5a4dbd;
}

/* ======================
   Visualization
   ====================== */

.viz-container {
  display: flex;
  flex-direction: column;
  height: 100%; /* ← 关键 */
  flex: 1;
}

/*.viz-container,*/
.advanced-viz-container {
  margin-bottom: 20px;
  background: white;
  padding: 15px;
  border-radius: 6px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.viz-container h4,
.advanced-viz-container h4 {
  margin: 0 0 10px 0;
  color: #2c3e50;
  font-weight: 600;
}

.viz-canvas {
  width: 100%;
  height: 250px;
  min-height: 250px;
  border: 1px solid #ddd;
  border-radius: 4px;
  background: #f9f9f9; /* 可选：方便调试 */
}

.advanced-viz-canvas {
  width: 100%;
  height: 500px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

.gui-container {
  margin-top: 10px;
}

/* ======================
   Responsive
   ====================== */
@media (max-width: 768px) {
  .control-panel {
    flex-direction: column;
    gap: 10px;
  }
  .button-group {
    width: 100%;
    justify-content: center;
  }
}

/* Upload Button */
.custom-file-upload {
  display: inline-block;
  padding: 6px 12px;
  background: #0d6efd;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
}

.custom-file-upload:hover {
  background: #0b5ed7;
}

#fileInput {
  display: none;
}

.btn img {
  display: inline-block;
  width: 18px;
  height: 18px;
  vertical-align: middle;
}

/*!* 专用于决策边界可视化 *!*/
/*.viz-container.decision-boundary .viz-canvas {*/
/*  height: calc(100% - 60px); !* 减去标题 + 控制按钮 + 间距 *!*/
/*  min-height: 400px;         !* 保证最小高度 *!*/
/*  max-height: 1200px;         !* 可选：防止过高 *!*/
/*}*/

/* 决策边界专用：增大高度 */
.viz-container.decision-boundary {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.viz-container.decision-boundary .viz-canvas {
  flex: 1;
  height: auto;        /* 由 flex 决定 */
  min-height: 500px;   /* 最小高度比之前更大 */
}

/* 激活函数专用：撑满高度 */
.viz-container.activation .viz-canvas {
  flex: 1;
  height: auto;        /* 由 flex 决定 */
  min-height: 500px; /* 最小高度，防止太小 */
}