.box-layers {
  background-color: #eeeeee;
  padding: 2rem 1rem 4rem 1rem;
  border-top: 10px solid #dddddd;
  margin: 4rem 0;
}

.h2-wrapper {
  border: 1px solid black;
}

.box-sizing-example {
  background-color: #eeeeee;
  padding: 2rem;
  border: 10px solid #dddddd;
  width: 100%;
  box-sizing: border-box;
}

.overflow-example {
  width: 50%;
  height: 300px;
  overflow: auto;
}