body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 20px;
    background-color: #f0f0f0;
}

h1 {
    color: #333;
    font-size: clamp(1.5em, 5vw, 2.5em);
}

#status {
    margin: 10px 0;
    font-size: clamp(1.2em, 3vw, 1.5em);
    font-weight: bold;
    color: #004d40; /* Dark Teal */
}

#message {
    margin: 5px 0 20px 0;
    font-size: clamp(0.9em, 2vw, 1em);
    color: #666;
}

#game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

#chess-board {
    /* Creates an 8x8 grid */
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    grid-template-rows: repeat(8, 1fr);
    width: clamp(280px, 80vw, 560px);
    height: clamp(280px, 80vw, 560px);
    border: 5px solid #222;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
}

.square {
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: clamp(24px, 5vw, 48px); /* Size for Unicode piece symbols */
    cursor: pointer;
    user-select: none;
    transition: background-color 0.15s ease;
}

/* Color for the dark squares (Greenish) */
.square.dark {
    background-color: #769656;
}

/* Color for the light squares (Cream) */
.square.light {
    background-color: #eeeed2;
}

/* Highlight for the currently selected piece */
.square.selected {
    background-color: #baca44; /* Bright Green highlight */
    outline: 3px solid #f9f91a;
}

/* Styling for the piece characters (Unicode) */
.piece {
    font-family: "Segoe UI Symbol", "Noto Sans Symbols", sans-serif;
    line-height: 1;
}

/* White pieces (Uppercase in the backend) */
.piece.white {
    color: #fff; 
    text-shadow: 1px 1px 2px #333;
}

/* Black pieces (Lowercase in the backend) */
.piece.black {
    color: #222;
    text-shadow: 1px 1px 2px #fff;
}

/* Checkmate king highlight */
.checkmate-king {
    background-color: #ff0000 !important; /* Red background */
    border: 3px solid #cc0000; /* Darker red border */
}