.before{
    box-sizing: border-box;
    margin-bottom: 10%;
}

.box-contact:after{
    content: "";
    display: table;
    clear: both;
}

.contact{
    float: left;
    width: 33.33%;
    padding: 10px;
    text-align: center;
}

@media screen and (max-width: 600px) {
    .contact {
        width: 100%;
    }
}