*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body{
    display: flex;
    height: 90vh;
    align-items: center;
    justify-content: space-evenly;
    flex-direction: column;
    background-color: whitesmoke;
}

#tetris{
    background-color: white;
    box-shadow: 0 0 10px 2px lightgrey;
}