.pull-right {
float: right;
}
.pull-left {
float: left;
.cf:before,
.cf:after {
content: " "; /* 1 */
display: table; /* 2 */
clear: both;
.small-margin {
margin-top: 20px;
margin-bottom: 20px;
.medium-margin {
margin-top: 40px;
margin-bottom: 40px;
.clear {