.btnLogin {
    width:100%;
    height: 50px;
    margin: 0;
    padding: 0 20px;
    vertical-align: middle;
    background: #152738;
    background: #330066;
    border: 0;
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    font-weight: 300;
    line-height: 50px;
    color: #fff;
    /*-moz-border-radius: 4px; -webkit-border-radius: 4px; border-radius: 4px;*/
    text-shadow: none;
    -moz-box-shadow: none;
    -webkit-box-shadow: none;
    box-shadow: none;
    -o-transition: all .3s;
    -moz-transition: all .3s;
    -webkit-transition: all .3s;
    -ms-transition: all .3s;
    transition: all .3s;
}

.back1{
    background-image: url("storage/images/1.jpg") !important;
}
.back2{
    background-image: url("storage/images/2.jpg") !important;
}
.back3{
    background-image: url("storage/images/3.jpg") !important;
}
.back4{
    background-image: url("storage/images/4.jpg") !important;
}