/**
 * blog-animations.css - Dynamic Header Loading Animations
 * Handles scroll-triggered animations for blog post elements
 */

/* --- DYNAMIC HEADER ANIMATIONS --- */

/* Base state for animated elements */
.header-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: 
        opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    transition-delay: var(--anim-delay, 0s);
}

/* Visible state */
.header-animate.header-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Special animation for article title - more dramatic entrance */
.article-title.header-animate {
    transform: translateY(40px) scale(0.97);
    transition: 
        opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.article-title.header-animate.header-visible {
    transform: translateY(0) scale(1);
}

/* Content headers (h2) - slide from left with subtle movement */
.article-content h2.header-animate {
    transform: translateX(-30px) translateY(20px);
    transition: 
        opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.6s cubic-bezier(0.16, 1, 0.3, 1),
        text-shadow 0.6s ease;
}

.article-content h2.header-animate.header-visible {
    transform: translateX(0) translateY(0);
}

/* H3 headers - subtle slide from left */
.article-content h3.header-animate {
    transform: translateX(-20px);
    transition: 
        opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.article-content h3.header-animate.header-visible {
    transform: translateX(0);
}

/* Callout and CTA box animations - scale up effect */
.callout.header-animate,
.article-cta.header-animate {
    transform: translateY(25px) scale(0.98);
    transition: 
        opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.callout.header-animate.header-visible,
.article-cta.header-animate.header-visible {
    transform: translateY(0) scale(1);
}

/* TOC container animation */
.toc-container.header-animate {
    transform: translateY(20px);
    transition: 
        opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.toc-container.header-animate.header-visible {
    transform: translateY(0);
}

/* Breadcrumb animation */
.article-breadcrumb.header-animate {
    transform: translateY(15px);
}

.article-breadcrumb.header-animate.header-visible {
    transform: translateY(0);
}

/* Article meta animation */
.article-meta.header-animate {
    transform: translateY(20px);
}

.article-meta.header-animate.header-visible {
    transform: translateY(0);
}

/* Navigation animation - slide down */
nav.main-nav.header-animate {
    transform: translateY(-100%);
    opacity: 1;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

nav.main-nav.header-animate.header-visible {
    transform: translateY(0);
}

/* Footer animation - fade up */
footer.header-animate {
    transform: translateY(30px);
    transition: 
        opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

footer.header-animate.header-visible {
    transform: translateY(0);
}

/* Accessibility: Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    .header-animate {
        opacity: 1;
        transform: none !important;
        transition: none !important;
    }
    
    .header-animate.header-visible {
        transform: none !important;
    }
    
    .article-title.header-animate,
    .article-content h2.header-animate,
    .article-content h3.header-animate,
    .callout.header-animate,
    .article-cta.header-animate,
    .toc-container.header-animate,
    .article-breadcrumb.header-animate,
    .article-meta.header-animate {
        opacity: 1;
        transform: none !important;
        transition: none !important;
    }
}