* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

#book-container {
    width: 60%;
    height: 80%;
    background-color: #fff;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

#page-container {
    width: 100%;
    height: 100%;
    position: relative;
}

.page {
    display: none;
    padding: 20px;
    height: 100%;
    overflow-y: auto;
}

.page.active {
    display: block;
}

.controls {
    position: absolute;
    bottom: 10px;
    width: 100%;
    text-align: center;
}

.controls button {
    padding: 10px 20px;
    margin: 0 10px;
    border: none;
    background-color: #007bff;
    color: white;
    cursor: pointer;
}

.controls button:hover {
    background-color: #0056b3;
}