.hero-bg {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('./assets/photo-1544947950-fa07a98d237f.avif');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.book-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.sticky-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn 1s ease-in-out;
}

.reading-progress {
    height: 4px;
    background: #4f46e5;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
}