body {
  font-family: Arial;
  margin: 20px;
}

h1 {
  margin-bottom: 10px;
}

.toolbar {
  margin-bottom: 10px;
}

button {
  margin-right: 5px;
  padding: 6px 12px;
  cursor: pointer;
}

.container {
  display: flex;
  gap: 20px;
}

.editor-panel {
  flex: 2;
}

.preview-panel {
  flex: 1;
  border: 1px solid #ccc;
  padding: 10px;
}

#editor {
  height: 500px;
  border: 1px solid #ccc;
}

#previewContent {
  white-space: pre-wrap;
  font-family: monospace;
}