body {
}
.startcontainer {
    z-index: -100; /*1;*/
    position: fixed; /*relative;*/
    inset: 0;
    overflow: hidden;
    min-height: 100vh; /*35rem;*/
    background-image: url("/font/paysage_oiseaux.jpg");
    background-size: cover;
    background-position: top left;
}

.start-screen {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}