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

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

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

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