html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    background: #000; /* Start: Schwarz */
}

/* Hintergrundbild als überlagerte Ebene */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("miseu21.jpg"); 
    background-size: cover;
    background-position: center;
    opacity: 0;
    animation: fadeIn 5s ease-in-out forwards; 
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}