.login{  background-image:    url(../img/portada.png);
    background-size:     cover;                      
    background-repeat:   no-repeat;
    background-position: center center; 

}
.logo{width: 100px;margin: 0px auto 30px; display: block;}
.m25w{width: max(300px,25%);}
#togglePassword{float: right; margin-top: -25px; right: 10px; position: relative; z-index: 2;}