footer {
    position: absolute;
    bottom: 0;
    padding: 0 20px 0 0; /*padding-top, padding-right, padding-bottom, padding-left*/
    background-color: transparent;
    color: #FFF;
    width: 100%;
    height: 80px; /*auto;*/
    text-align: right;
    line-height: 80px;
}
.redes {
    width: 100%;
    text-align: center;
}
.redes img {
    width: 18%;
}
.redes ul li {
    text-transform: uppercase;
    list-style-type: none;
    display: inline;
}
@media only screen and (min-width: 450px)
and (max-width: 769px){
    footer {
        clear: both;
        width: 100%;
     }
     .redes {
         width: 50%;
         float: right;
     }
}
@media only screen and (min-width: 769px) {
    footer {
        width: 100%;
        clear: both;
        margin-bottom: 1%;
    }
     .redes {
         width:25%; /*11%;*/ /*45%;*/
         float: right;
         margin-right: 1%;
         text-align: center;
     }
}