body {
  background-color: #f8f9fa;
}

#mermaid-preview {
  border: 1px solid #ccc;
  border-radius: 5px;
  padding: 10px;
  min-height: 300px;
  overflow: auto;
  background-color: #fff;
}

.small-btn {
  padding: 0.2rem 0.5rem;
  font-size: 0.8rem;
}

.color-box {
  display: inline-block;
  width: 15px;
  height: 15px;
  border-radius: 3px;
  margin-right: 5px;
  vertical-align: middle;
}