message: improved closing animation responsivity
diff: .tests {
  max-height: 0;
  overflow: hidden;
  - transition: max-height 200ms linear;
  + transition: max-height 300ms linear;
  list-style: none;
  }
  .tests.active {
  - max-height: 1000px;
  + max-height: 500px;
  transition: max-height 400ms linear;
  }
  