#main {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#roulette-grid {
    margin: 10px;
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    grid-gap: 10px;
    margin: 0 auto;
    padding: 20px;
}

#roulette-grid>input {
    color: white;
    font-size: 20px;
    width: 50px;
}

#roulette-grid>input:nth-child(odd) {
    background-color: red;
}

#roulette-grid>input:nth-child(even) {
    background-color: black;
}