body {
    padding: 0px;
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url(../img/form-bg.png) fixed center center;
    background-size: cover;
    min-height:100vh;
    margin:auto 0;
}
.login-container {
    float: none;
    margin: 0 auto;
    margin-top: 51px;
    background: linear-gradient(rgba(250, 250, 250, 0.6), rgba(0, 0, 0, 0.6));
    padding-bottom:42px;
}
.login-container h3, span, .card-header{
    text-align:center;
}

.pull-left{
    float:left;
}
.pull-right{
    float:right;
}