footer{position:absolute;bottom:0;width:100%;height:60px}body{position:relative;min-height:100%}body::after{content:'';display:block;height:60px}.contenido{padding-bottom:300px}.span-center{margin:auto;width:30%;float:none;padding-bottom:30px}.transparente{opacity:.5}pull-right{float:right !important}.texto_inicial{font-size:16px;font-weight:bold;line-height:25px;padding-top:10px;text-align:justify}