html, body, .container {
            height: 100%;
            width: 100%;
        }
        .container {
            display: table;
            vertical-align: middle;
        }
        .col-center-block {
            float: none;
            display: block;
            margin-left: auto;
            margin-right: auto;
        }
        .vertical-center-row {
            display: table-cell;
            vertical-align: middle;
        }
        .vs-big-font {
            font-size: 91px;
        }
        .vs-screen-bg {
            background-color: #000;
        }