body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

#gameContainer {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 100%;
    background-color: white;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

#gameArea {
    position: relative;
    width: 100%;
    padding-top: 100%; /* 1:1 aspect ratio */
    background-color: #e0e0e0;
    border: 1px solid #ccc;
    margin-top: 20px;
}

.shape {
    position: absolute;
    cursor: pointer;
    perspective: 500px;
}

.shape-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    animation: rotate 5s linear infinite;
}

@keyframes rotate {
    0% {
        transform: rotateY(0);
    }
    100% {
        transform: rotateY(1turn);
    }
}