table#connect-4-board {
    background-color: blue;
}

table#connect-4-board td {
    background-color: var(--theme_bg, white);
    border: 1px solid black;
    border-radius: 50%;
    text-align: center;
    width: 75px;
    height: 75px;
    font-weight: bold;
}

table#connect-4-board td.p1 {
    background-color: red;
    color: white;
}

table#connect-4-board td.p2 {
    background-color: yellow;
    color: black;
}

table#connect-4-board td.highlight {
    border: 2px solid magenta;
}

#difficulty-label {
    font-weight: bold;
}