body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #1a1a2e; /* Dark blue background for a dark theme */
    color: #ffffff; /* White text for visibility */
}

h1 {
    text-align: center;
    margin: 20px;
    color: #ffffff;
    font-size: 30px;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-family: 'Courier New (monospace)';
}

.background {
    display: flex;
    justify-content: center;
    align-items: center;
    height: calc(100vh - 80px); /* Full viewport height minus header */
    padding: 10px;
}

.chessboard {
    display: grid;
    grid-template-columns: repeat(8, 60px); /* 8 columns with square size 60px */
    grid-template-rows: repeat(8, 60px); /* 8 rows with square size 60px */
    border: 4px solid #ffffff; /* Chessboard border */
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.3); /* Subtle glowing effect */
}

.square {
    width: 60px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    position: relative; /* Allows for stacking pieces */
}

.square.light {
    background-color: #dcdcdc; /* Light grey square color */
}

.square.dark {
    background-color: #2b2e4a; /* Dark blue square color */
}

.piece {
    font-size: 30px;
    font-weight: bold;
    user-select: none;
    cursor: grab;
    display: flex;
    justify-content: center;
    align-items: center;
}

.piece.white {
    color: #ffffff; /* White piece color */
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.7);
}

.piece.black {
    color: #000000; /* Black piece color */
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 50%; /* Rounded background for black pieces */
}

.piece:active {
    cursor: grabbing;
    transform: scale(1.1); /* Zoom-in effect when dragging */
    transition: transform 0.1s ease-in-out;
}

/* Glow effect when dragging over a valid square */
.square:hover {
    outline: 2px solid rgba(255, 255, 0, 0.6);
}

/* Flipping the chessboard for black's perspective */
.chessboard.flipped {
    transform: rotate(180deg); /* Rotate the entire board */
}

/* Correcting square rotation inside the flipped board */
.chessboard.flipped .square {
    transform: rotate(180deg); /* Keep squares and pieces upright */
}

/* Smooth flipping animation */
.chessboard {
    transition: transform 0.5s ease-in-out;
}