* {
    margin: 0;
    padding: 0;
}

.container-1 {
    margin: 2% auto;
    width: 50%;
    height: 400px;
}

.container-2 {
    margin: 2% auto;
    width: 20%;
    height: 400px;
}
.clearfix {
    overflow: none;
}
.clearfix:after {
    content: "";
    clear: both;
    display: table;
}