body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f0f0f0;
}
.book {
    width: 100%;
    height: 600px;
    position: relative;
    margin-bottom: 40px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    background-color: white;
    overflow: hidden;
}
.media-container {
    width: 100%;
    height: 100%;
    position: relative;
}
.media-item {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.6s ease;
}
.media-item.active {
    opacity: 1;
}
.media-item img, .media-item video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.text {
    background-color: #ffffff;
    padding: 20px;
    border-radius: 5px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}
h1, h2 {
    color: #2c3e50;
}
.dots {
    text-align: center;
    margin-top: 10px;
}
.dot {
    height: 10px;
    width: 10px;
    background-color: #bbb;
    border-radius: 50%;
    display: inline-block;
    margin: 0 5px;
}
.dot.active {
    background-color: #717171;
}
.click-area {
    position: absolute;
    top: 0;
    width: 50%;
    height: 100%;
    cursor: pointer;
}
.click-area.left { left: 0; }
.click-area.right { right: 0; }