.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.difficulty {
    margin: 20px 0;
}

.game-container {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

#puzzle-board, #pieces-board {
    border: 2px solid #333;
    position: relative;
    width: 600px;
    height: 600px;
    overflow: hidden;
}

#puzzle-board {
    background: #f0f0f0;
}

#pieces-board {
    background: #f8f8f8;
}

.puzzle-piece {
    position: absolute;
    user-select: none;
    touch-action: none;
    cursor: grab;
    border: 1px solid #fff;
    box-shadow: 0 0 5px rgba(0,0,0,0.2);
    touch-action: none;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.puzzle-piece:active {
    cursor: grabbing;
}

.puzzle-piece.correct {
    border: 1px solid #00ff00;
    box-shadow: 0 0 5px rgba(0,255,0,0.5);
}

body.dragging {
    overflow: hidden;
    position: fixed;
    width: 100%;
}