body {
    margin: 0;
    background-color: black;
}
main {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
}

#logo {
    width: 20vw;
    height: auto;
}

@media (max-width: 800px) {
    #logo {
        width: 90vw;
    }
}