:root{
    --grey: rgb(43, 43, 43);
}
html,body{
    margin: 0;
    padding: 0;
}
main{
    height: 100vh;
    
}
#logo{
    width: 300px;
    height: 300px;
}

.grey-background{
    background-color: var(--grey);
}

.center{
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
}