.piece {
    position: absolute;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(14px, 4vw, 20px);
    font-weight: bold;
    cursor: pointer;
    transition: box-shadow 0.2s ease;
    user-select: none;
    z-index: 10;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.piece.red {
    background: radial-gradient(circle, #ffffff 0%, #e74c3c 80%);
    color: #c0392b;
    border: 2px solid #c0392b;
}

.piece.black {
    background: radial-gradient(circle, #ffffff 0%, #2c3e50 80%);
    color: #2c3e50;
    border: 2px solid #2c3e50;
}

.piece.selected {
    box-shadow: 0 0 0 3px rgba(255, 235, 59, 0.9), 0 0 15px rgba(255, 235, 59, 0.8);
    z-index: 20;
}

.piece:hover {
    box-shadow: 0 0 0 2px rgba(255, 235, 59, 0.5), 0 2px 8px rgba(0, 0, 0, 0.3);
}

.piece.captured {
    animation: captureAnimation 0.5s ease-out forwards;
}