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150px);transition:all .5s cubic-bezier(.4,0,.2,1);display:flex;position:sticky;top:90px;overflow-y:auto}.side-panel.active{opacity:1;flex:0 0 45%;width:auto;margin-left:20px;padding:40px 30px}.panel-content{flex-direction:column;height:100%;display:flex}.panel-content img{object-fit:contain;background:#1a1a1b;border-radius:4px;flex-shrink:0;width:100%;max-height:60vh;margin-bottom:25px}.panel-content h2{color:#fff;margin-bottom:10px;font-size:1.8rem}.panel-content p{color:#ccc;margin-bottom:20px;line-height:1.6}.panel-content p:last-of-type{padding-bottom:10px}.side-panel::-webkit-scrollbar{width:6px}.side-panel::-webkit-scrollbar-thumb{background:#444;border-radius:10px}.category-label{text-transform:uppercase;background:#444;margin-bottom:10px;padding:2px 8px;font-size:.8rem;display:inline-block}.close-btn{color:#fff;cursor:pointer;background:0 0;border:none;font-size:2rem;position:absolute;top:10px;right:15px}@media (width<=768px){.main-layout{flex-direction:column}.side-panel.active{z-index:100;width:85%;height:80vh;position:fixed;top:15vh;bottom:0;left:3vh}}.books-intro{text-align:center;max-width:800px;margin:0 auto 60px}.intro-text{color:#b0b0b0;font-size:1.2rem;line-height:1.8}.books-container{flex-direction:column;max-width:1000px;margin:0 auto;display:flex}.book-item-wrapper{border-top:1px solid #333;width:100%;padding:60px 0}.book-item-wrapper:first-child{border-top:none}.book-card{text-align:left;flex-direction:row;align-items:flex-start;gap:50px;display:flex}.book-cover{flex:0 0 250px;box-shadow:10px 10px 30px #00000080}.book-cover img{width:100%;height:auto;display:block}.book-info{flex-direction:column;flex:1;display:flex}.book-info h3{color:#fff;margin-bottom:15px;font-size:1.5rem}.book-info p{color:#a0a0a0;line-height:1.6}.book-description{color:#b0b0b0;margin-bottom:20px;font-size:1.1rem;font-style:italic;line-height:1.8}.book-title{color:#fff;text-transform:uppercase;letter-spacing:2px;font-size:1.8rem}@media (width<=768px){.book-card{text-align:center;flex-direction:column;align-items:center;gap:30px}.book-cover{flex:none;width:200px}.book-item-wrapper{padding:40px 0}}