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ease}.btn-primary:hover{background:var(--secondary-color);transform:translateY(-2px)}.category-card{background:#fff;border-radius:15px;padding:2rem;text-align:center;transition:all .3s ease;box-shadow:0 5px 20px #0000001a;cursor:pointer;height:200px;display:flex;flex-direction:column;justify-content:center}.category-card:hover{transform:translateY(-5px);box-shadow:0 15px 40px #00000026}.category-icon{font-size:3rem;color:var(--accent-color);margin-bottom:1rem}.stats-section{background:var(--primary-color);color:#fff;padding:4rem 0}.stat-item{text-align:center}.stat-number{font-size:3rem;font-weight:700;color:var(--accent-color)}.testimonial-card{background:#fff;border-radius:15px;padding:2rem;box-shadow:0 5px 20px #0000001a;height:100%}.rating{color:#ffc107}.footer{background:var(--dark-text);color:#fff;padding:3rem 0 1rem}.social-icons a{color:#fff;font-size:1.5rem;margin:0 10px;transition:color .3s ease}.social-icons a:hover{color:var(--accent-color)}.floating-cart{position:fixed;bottom:20px;right:20px;background:var(--secondary-color);color:#fff;border-radius:50%;width:60px;height:60px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px #0000004d;cursor:pointer;transition:all .3s ease;z-index:1000}.floating-cart:hover{transform:scale(1.1);background:var(--primary-color)}.cart-badge{position:absolute;top:-5px;right:-5px;background:var(--accent-color);color:#fff;border-radius:50%;width:25px;height:25px;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:600}@media(max-width:768px){.hero-section{min-height:60vh;text-align:center}.stat-number{font-size:2rem}.book-cover{height:200px}}.newsletter-section{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:4rem 0}.book-detail-cover{position:relative;height:650px;display:flex;align-items:center;justify-content:center;overflow:hidden;border-radius:12px;box-shadow:0 10px 24px 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.features-list{text-align:left;margin:2rem 0}.thank-you-card .feature-item{display:flex;align-items:center;margin-bottom:1rem;color:#6c757d}.thank-you-card .feature-item i{margin-right:.75rem;width:20px;font-size:1.1rem}@media(max-width:768px){.thank-you-card{padding:2rem 1.5rem;margin:1rem 0}.thank-you-card .main-title{font-size:2rem}.thank-you-card .book-icons{display:none}}.product-filters{background:#f8f9fa;border-radius:12px;padding:1rem 1.25rem;box-shadow:0 4px 12px #00000008}.product-filters .form-label{font-weight:600;font-size:.9rem;color:#374151}.product-filters .input-group-text{background-color:#fff}.btn-submit-filter{width:200px;height:40px}.btn-remove-filter{width:200px}.price-range-wrapper{position:relative;padding-top:24px;padding-bottom:24px}.price-range-track{position:absolute;left:0;right:0;top:50%;height:4px;transform:translateY(-50%);border-radius:999px;background-color:#dee2e6;z-index:1}.price-range-selected{position:absolute;top:50%;height:4px;transform:translateY(-50%);border-radius:999px;background-color:#0b99c4;pointer-events:none;z-index:2}.price-bubble{position:absolute;left:0;padding:2px 10px;font-size:.8rem;background-color:#0b99c4;color:#fff;border-radius:999px;white-space:nowrap;pointer-events:none;box-shadow:0 2px 6px #0003;display:inline-flex;align-items:center;justify-content:center;text-align:center;z-index:4}#priceBubbleMin{top:15px;transform:translate(-43%,-100%)}#priceBubbleMax{bottom:15px;transform:translate(-53%,100%)}.price-range-input{position:absolute;left:0;right:0;top:50%;transform:translateY(-50%);margin-top:-6px;background-color:#007092;width:100%;background:none;pointer-events:none;-webkit-appearance:none;-moz-appearance:none;appearance:none;z-index:3}.price-range-input::-webkit-slider-runnable-track{height:4px;background:transparent}.price-range-input::-moz-range-track{height:4px;background:transparent}.price-range-input::-webkit-slider-thumb{pointer-events:auto;-webkit-appearance:none;-moz-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background-color:#0b99c4;border:2px solid #0b99c4;box-shadow:0 0 0 2px #0b99c433}.price-range-input::-moz-range-thumb{pointer-events:auto;width:16px;height:16px;border-radius:50%;background-color:#0b99c4;border:2px solid 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#0003;z-index:2}.discount-switch-slider:after{content:"TẮT";position:absolute;top:50%;right:12px;transform:translateY(-50%);font-size:12px;font-weight:700;letter-spacing:.5px;color:#334155;transition:.4s;z-index:1}.discount-switch-input:checked+.discount-switch-slider{background-color:#667eea}.discount-switch-input:checked+.discount-switch-slider:before{transform:translate(40px)}.discount-switch-input:checked+.discount-switch-slider:after{content:"BẬT";left:14px;right:auto;color:#fff}.discount-switch-input:focus+.discount-switch-slider{box-shadow:0 0 0 3px #3b82f64d}.recently-viewed-empty{min-height:320px;padding:14rem 1rem;display:flex;flex-direction:column;align-items:center;justify-content:center;background-color:#f8f9fa;border-radius:.75rem;border:1px dashed #dee2e6}.recently-viewed-empty-icon{width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;background-color:#fff;box-shadow:0 4px 12px #0000000f}.recently-viewed-empty-icon i{font-size:1.75rem}