:root { scroll-behavior: smooth; }
        body { background-color: #FFFFFF; color: #2C3E50; }
        .book-card { transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275); }
        .book-card:hover { transform: translateY(-10px); box-shadow: 0 20px 40px rgba(26, 45, 91, 0.1); }
        .glass-nav { background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); border-bottom: 2px solid #F5F5F5; }
        .btn-accent { background-color: #FFD966; color: #1A2D5B; border-radius: 8px; font-weight: 700; transition: all 0.3s; }
        .btn-accent:hover { background-color: #F1C40F; transform: scale(1.02); }
        .cart-drawer { transform: translateX(100%); transition: transform 0.4s ease; }
        .cart-drawer.open { transform: translateX(0); }
        .auth-modal { display: none; }
        .auth-modal.active { display: flex; }
        .category-pill { transition: all 0.2s; cursor: pointer; border: 1px solid #E5E7EB; }
        .category-pill.active { background: #1A2D5B; color: #FFD966; border-color: #1A2D5B; }