.live-demo-containter {
    background: #004188;
    padding-top: 2.5rem;
    position: relative;
    margin: 0 0 30px 0;
}
.live-demo-containter::after {
    content: "";
    background: #004188;
    position: absolute;
    left: 50%;
    top: 0px;
    width: 100vw;
    transform: translate(-50%,0);
    height: 100%;
    z-index: -1;
}