HTMLify

body {
    text-align: center;
    font-family: Arial, sans-serif;
    background-color: #2c3e50;
    color: white;
}

h1 {
    font-size: 32px;
    margin-bottom: 10px;
}

#chessboard {
    display: grid;
    grid-template-columns: repeat(8, 80px);
    grid-template-rows: repeat(8, 80px);
    width: 640px;
    height: 640px;
    margin: auto;
    border: 5px solid black;
    box-shadow: 0px 8px 16px rgba(0, 0, 0, 0.5);
}

.cell {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 50px;
    font-weight: bold;
    cursor: pointer;
    user-select: none;
    transition: all 0.2s ease-in-out;
}

.black { background-color: #769656; }  /* Dark Green */
.white { background-color: green; }  /* Light Cream */
.selected { background-color: yellow !important; } /* Selected Piece */
.valid-move { background-color: rgba(255, 255, 0, 0.6) !important; } /* Highlight Moves */
.capture { background-color: rgba(255, 0, 0, 0.6) !important; } /* Capture Move */

#turn {
    font-size: 22px;
    font-weight: bold;
    margin-top: 15px;
}

#undo {
    margin-bottom: 10px;
    padding: 8px 16px;
    font-size: 16px;
    background-color: red;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 5px;
}

#undo:hover {
    background-color: darkred;
}