body {
    font-family: Arial, sans-serif;
    text-align: center;
    background: #000;
    color: #fff;
    margin: 0;
    padding: 0;
}

#game {
    display: grid;
    grid-template-columns: repeat(20, 20px); /* 20x20 grid */
    grid-template-rows: repeat(20, 20px);
    gap: 1px;
    margin: 20px auto;
    background: #111;
    width: 390px;
    height: 420px;
}

.snake {
    background: #0f0;
}

.food {
    background: red;
    border-radius: 50%;
}

#score {
    margin-top: 10px;
    font-size: 18px;
}
#game.hidden {
    display: none;
}