body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color:black;
}

.container {
    display: grid;
    height: 100vh;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr;
    grid-template-areas: "inhalt1 inhalt2";
    grid-gap: 1rem;
    text-align: center;
}

#inhalt1 {
    grid-area: inhalt1;
}

#inhalt2 {
    grid-area: inhalt2;
}

@media only screen and (max-width: 800px) {
    .container {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr 1fr;
        grid-template-areas: 
            "inhalt1" 
            "inhalt2";
    }
}