.tiamat.header {
    background-image: url(/twitter_dashboard/assets/tiamat/tiamat360.png);
    background-size: cover;
    background-repeat: no-repeat;
    height: 20rem;
    position: absolute;
    width: 24rem;
    top: 7rem;
    left: calc(50% + 23rem);
    transform: translate(-50%, -50%);
}