/* Article card hover effects */
.article-card {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.article-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

/* Lazy loading images */
.lazy-load {
    opacity: 0;
    transition: opacity 0.3s;
}

.lazy-load.loaded {
    opacity: 1;
}

/* Mobile menu animation */
.mobile-menu {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.mobile-menu.open {
    transform: translateX(0);
}

/* Back to top button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}