.columna{width:33.33%;float:left;padding:10px;-webkit-box-sizing:border-box;box-sizing:border-box}.imagen{width:100%;height:0;padding-bottom:100%;background-size:cover;background-position:50%}.title{text-align:left;font-size:24px;@media (min-width:600px){font-size:32px}}