html {
    overflow: hidden;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    grid-gap: 1px;
    margin: 20px auto;
    width: fit-content;
    background-color: var(--txt-color1);
    padding: 1px;
}

.cell {
    width: 100px;
    height: 100px;
    background-color: var(--bg-color);
    border: none;
    color: var(--txt-color2);
    font-size: 33px;
    font-family: 'Courier New', Courier, monospace;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
}