body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

.container {
    perspective: 1000px;
}

.letter-g {
    width: 500px;
    height: 500px;
    background-color: #3498db;
    color: #fff;
    font-size: 336px;
    display: flex;
    justify-content: center;
    align-items: center;
    transform-style: preserve-3d;
    transform: rotateY(0deg);
    transition: transform 1s;
}