.box-layers {
    background-color: #eeeeee;
    padding: 2rem;
    border: 10px solid #dddddd;
    margin: 4rem;
}
.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: hidden;
    overflow: auto;
}