piskel/src/css/toolbox.css

.toolbox-container {
  border: 4px solid #888;
  font-size: medium;
  color: white;
  text-align: left;
  border-radius: 4px;
  margin-top: 5px;
  margin-bottom: 10px;
  overflow: hidden;
}

.toolbox-title {
  padding: 8px;
  margin: 0;
  font-size: 15px;
  background: #222;
}