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rgba(0,0,0,.15);font-family:Fredoka,sans-serif;position:relative;overflow:hidden}.book-promo-content:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,#667eea,#764ba2,#f093fb,#f5576c);background-size:300% 300%;animation:gradientShift 3s ease infinite}@keyframes gradientShift{0%,to{background-position:0 50%}50%{background-position:100% 50%}}.book-promo-header h4{color:#1e293b;font-size:1rem;font-weight:700;margin:0 0 1rem;line-height:1.2}.book-cover{margin-bottom:1rem;display:flex;justify-content:center}.book-image{border-radius:8px;box-shadow:0 4px 15px rgba(0,0,0,.2);transition:transform .3s ease}.book-promo-content:hover .book-image{transform:scale(1.05) rotate(2deg)}.book-info h5{color:#1e293b;font-size:.9rem;font-weight:700;margin:0 0 .25rem;line-height:1.3}.book-subtitle{color:#667eea;font-size:.75rem;font-weight:600;margin:0 0 .5rem;text-transform:uppercase;letter-spacing:.5px}.book-description{color:#475569;font-size:.8rem;margin:0 0 1.25rem;line-height:1.4}.book-buy-button{display:inline-flex;align-items:center;gap:.5rem;padding:.75rem 1rem;background:linear-gradient(135deg,#ff9a56,#ff6b35);color:white;border:none;border-radius:25px;font-weight:700;font-size:.85rem;text-decoration:none;transition:all .3s ease;box-shadow:0 4px 15px rgba(255,107,53,.3);width:100%;justify-content:center}.book-buy-button:hover{background:linear-gradient(135deg,#ff6b35,#e55a2b);transform:translateY(-2px);box-shadow:0 6px 20px rgba(255,107,53,.4);color:white;text-decoration:none}.book-buy-button i{font-size:1rem}.book-promo-sticky:after{content:"";position:absolute;top:-5px;left:-5px;right:-5px;bottom:-5px;border:2px solid rgba(102,126,234,.4);border-radius:25px;animation:pulse 2s ease-in-out infinite;pointer-events:none}@keyframes pulse{0%,to{opacity:0;transform:scale(.95)}50%{opacity:1;transform:scale(1.05)}}@media (max-width:1200px){.book-promo-sticky{right:.5rem;width:180px}.book-promo-content{padding:1.25rem}.book-image{width:70px;height:105px}.book-promo-toggle{width:35px;height:50px;left:-18px;font-size:.9rem}}@media (max-width:768px){.book-promo-sticky.hidden{transform:translateY(calc(100% - 50px))}.book-promo-sticky.visible{transform:translateY(0)}.book-promo-toggle{left:50%;top:-25px;transform:translateX(-50%);width:50px;height:30px;border-radius:15px 15px 0 0;box-shadow:0 -4px 15px rgba(102,126,234,.3)}.book-promo-toggle:hover{transform:translateX(-50%) scale(1.05);box-shadow:0 -6px 20px rgba(102,126,234,.4)}.book-promo-toggle i{transform:rotate(90deg)}.book-promo-sticky.hidden .book-promo-toggle i{transform:rotate(-90deg)}.book-promo-sticky{position:fixed;bottom:1rem;right:1rem;left:1rem;top:auto;width:auto;display:block}.book-promo-content{display:flex;align-items:center;gap:1rem;padding:1rem;text-align:left}.book-cover{margin:0;flex-shrink:0}.book-image{width:50px;height:75px}.book-info{flex-grow:1}.book-info h5{font-size:.85rem;margin-bottom:.1rem}.book-subtitle{font-size:.7rem;margin-bottom:.2rem}.book-description{display:none}.book-buy-button{flex-shrink:0;width:auto;padding:.6rem .8rem;font-size:.8rem}.book-promo-header{display:none}}