section {
    margin-bottom: 1em;
    padding: 0;
    width: 100%;
 }

.bouton {
    border: none;
    border-radius: 7px;
    text-align: center;
    color: black;
    font-weight: bold;
    background-color: cyan;
    padding: 0.5em 0 0.5em 0;
    margin: 0.3em;
    width: 7em;
    height: 3em;
    box-shadow:  0 4px 8px 0 rgba(0, 0, 0, 0.4);
 }

 .bouton:hover {
     background-color: teal;
 }