.book-container {
    max-width: 1200px;
    margin: auto;
    box-shadow: 0 4px 8px rgba(0,0,0,.1);
    border-radius: 8px;
    overflow: hidden;
    padding: 10px;
    border: 1px solid #e0e0e0
}

.book-page {
    padding: 10px;
    background: #fbefef;
    position: relative
}

.chapter-title {
    font-size: 24px;
    font-weight: bold;
    text-align: center;
    margin-bottom: 20px;
    color: #333;
    text-transform: uppercase;
    letter-spacing: 1.5px
}

.content p {
    font-family: Roboto,Helvetica,Georgia,Cambria;
    font-size: 1.25rem;
    line-height: 1.8;
    color: #333;
    margin-bottom: 15px;
    text-align: justify;
    text-indent: 0
}

.navigation-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 20px
}

.navigation-buttons .btn {
    font-size: 16px;
    font-weight: bold;
    border-radius: 50px;
    padding: 10px 20px;
    transition: all .3s ease
}

.navigation-buttons .btn:hover {
    background: #007bff;
    color: #fff;
    box-shadow: 0 4px 6px rgba(0,0,0,.1)
}