header {
    position: absolute;
    width: 100%;
    height: 100px;
    left: 0px;
    top: 0px;
    background: #000000;
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

header img {
    width: 83px;
    height: 43px;
}