.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)}