:root {
        --board-green: #2e7d32;
        --cell-border: #1b5e20;
        --white-pc: #ffffff;
        --black-pc: #1a1a1a;
    }

    #ui {
        text-align: center;
        margin: 10px;

    }

    .stats {
        display: flex;
        gap: 30px;
        font-size: 1.5rem;
        font-weight: bold;
        background: #333;
        padding: 10px 20px;
        border-radius: 10px;
        margin-top: 10px;
    }

    #board {
        display: grid;
        grid-template-columns: repeat(8, 50px);
        grid-template-rows: repeat(8, 50px);
        background: var(--cell-border);
        border: 5px solid var(--cell-border);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    }

    @media (min-width: 500px) {
        #board {
            grid-template-columns: repeat(8, 60px);
            grid-template-rows: repeat(8, 60px);
        }
    }

    .cell {
        width: 100%;
        height: 100%;
        background: var(--board-green);
        display: flex;
        justify-content: center;
        align-items: center;
        border: 1px solid var(--cell-border);
        cursor: pointer;
        position: relative;
    }

    .piece {
        width: 85%;
        height: 85%;
        border-radius: 50%;
        transition: transform 0.4s, background-color 0.4s;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    }

    .piece.black {
        background: var(--black-pc);
    }

    .piece.white {
        background: var(--white-pc);
    }

    .piece.flip {
        transform: rotateY(180deg);
    }

    .hint {
        width: 12px;
        height: 12px;
        background: rgba(0, 0, 0, 0.15);
        border-radius: 50%;
    }

    #menu {
        background: #2c3e50;
        padding: 20px;
        border-radius: 15px;
        margin-bottom: 20px;
    }

    button:hover {
        transform: scale(1.05);
    }

    .hidden {
        display: none;
    }

    #board {
        background-color: #27ae60;
    }

    .message {
        height: 10vh;
        width: 20vw;
        background-color: white;
        z-index: 10000;
        font-size: clamp(1rem, 1rem, 2rem);
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        position: fixed;
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 1rem;
        flex-direction: column;

        border-radius: 1rem;
        line-height: 1.5;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
            0 2px 4px -1px rgba(0, 0, 0, 0.06);

        border: 1px solid black;
    }