practice-time-landing-page-Ana_Carolina_Duarte_Cavalcante/css/layout/header.css

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

header a img {
    display: block;
}