.card {
    float:left;
    width:50%;
}

.test {
    padding:1em;
}

.overflow {
    overflow: hidden;
}

.clear {
    clear:both;
    border-bottom: 4px solid red;
}

.clearfix::after {
    content: "";
	display: block;
	clear: both;
	border-bottom: 4px solid purple;
}