body {
    margin: 0;
    padding: 0;
    border: 0;
    display: flex;
    flex-flow: column;
    height: 100vh;
}

embed {
    max-width: 100%;
    height: 100%;
    object-fit: contain;
}

#contenu {
    background-color: black;
    text-align: center;
    width: 100%;
    flex: 1;
    min-height: 0;
}