//*-- Mail --*\\
.icono-mail{
    @include goldenRectL($U28);
    @extend .icono-stroke;
    overflow: hidden;
    margin: $U8 $U3;
    &:before{
        position: absolute;
        @include square($U25);
        @extend .icono-stroke;
        transform: rotate(50deg) skew(-10deg, -20deg);
        top: -1*$U20;
        left: -1*$U3;
    }
}