html {

          background: url(/Content/Imagenes/back.jpg) no-repeat center center fixed; 
          -webkit-background-size: cover;
          -moz-background-size: cover;
          -o-background-size: cover;
          background-size: cover;
    }

    body {
        overflow-x: hidden;
        background-color:transparent;
    }

    .iniciologin{
        padding-right:0px;
    }

    .loginscreen{
        background-color:white;
    }

    .middle-box{
        padding-top:0px;
    }

    .BtnRegistrate{
        width: 100%; 
        background-color:#62bbf9!important;
        border-radius:9px;
        -moz-border-radius: 9px;
        -webkit-border-radius: 9px;
        border-color:#62bbf9!important;
    }