div.one -third
    width: 47.5%;
}

div.one-third-second {
    margin: 0;
}

div.one-thir-last {
    Clear: both;
    float: none;
    width: auto;
    padding: 20px 0 0 0;
}
@media screen and (max-width: 500px) {

    div.mobile-collapse {
    	width: auto;
	float: none;
	margin-rigth: 0;
    }
}