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

.container {
    perspective: 1000px;
}

.book {
    width: 400px;
    height: 400px;
    position: relative;
    transform-style: preserve-3d;
    animation: flip 1s forwards;
}

.page {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transform-origin: left;
}

.content {
    padding: 20px;
}

h2 {
    margin-top: 0;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}

input, select, button {
    width: calc(100% - 20px);
    padding: 8px;
    margin-bottom: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
}

button:hover {
    background-color: #45a049;
}

p {
    text-align: center;
}

a {
    color: #4CAF50;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

@keyframes flip {
    0% {
        transform: rotateY(-90deg);
        opacity: 0;
    }
    100% {
        transform: rotateY(0);
        opacity: 1;
    }
}