/**
 * Enhanced Single Post Page Styles
 * Professional, modern, and mobile-friendly single post design
 *
 * @package HaberPro
 * @version 2.0.0
 */

/* ============================================
   SINGLE POST ARTICLE
   ============================================ */
.single-post-article {
    max-width: 100%;
    margin: 0 auto;
}

/* ============================================
   FEATURED IMAGE ENHANCED
   ============================================ */
.post-featured-image-wrapper {
    position: relative;
    width: 100%;
    margin-bottom: var(--space-2xl);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: var(--bg-tertiary);
}

.post-featured-image {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 aspect ratio */
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
}

.post-featured-image img.featured-image-main {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform var(--transition-slow);
}

.post-featured-image:hover img.featured-image-main {
    transform: scale(1.02);
}

.featured-image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.3) 100%);
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    padding: var(--space-lg);
    pointer-events: none;
}

.featured-category-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--primary-color);
    color: var(--text-inverse);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: var(--radius-full);
    text-decoration: none;
    box-shadow: var(--shadow-md);
    pointer-events: auto;
    transition: all var(--transition-base);
}

.featured-category-badge:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   ENHANCED HEADER
   ============================================ */
.entry-header-enhanced {
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-xl);
    border-bottom: 2px solid var(--border-light);
}

.entry-header-inner {
    max-width: 100%;
}

.entry-categories-enhanced {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.category-badge-enhanced {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--primary-color);
    color: var(--text-inverse);
    text-decoration: none;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all var(--transition-base);
}

.category-badge-enhanced:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.entry-title-enhanced {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--text-primary);
    margin: 0 0 var(--space-lg) 0;
    letter-spacing: -0.5px;
}

.entry-summary-enhanced {
    font-size: var(--font-size-xl);
    line-height: var(--line-height-relaxed);
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    font-weight: var(--font-weight-normal);
}

.entry-summary-enhanced p {
    margin: 0;
}

/* ============================================
   ENHANCED META INFORMATION
   ============================================ */
.entry-meta-enhanced {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
}

.entry-meta-primary {
    flex: 1;
    min-width: 0;
}

.meta-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    align-items: center;
}

.meta-item-enhanced {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.meta-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    opacity: 0.8;
}

.meta-item-enhanced .author-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-base);
}

.meta-item-enhanced .author-link:hover {
    color: var(--primary-color);
}

.published-time {
    margin-left: var(--space-xs);
    opacity: 0.8;
}

.entry-updated-info {
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-light);
}

.updated-label {
    font-weight: var(--font-weight-medium);
    margin-right: var(--space-xs);
}

/* ============================================
   ENHANCED SHARE BUTTONS
   ============================================ */
.entry-share-top-enhanced {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-shrink: 0;
}

.share-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.share-buttons-compact-enhanced {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.share-btn-compact {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-base);
    position: relative;
}

.share-btn-compact:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.share-btn-compact.share-facebook:hover {
    background: #1877f2;
    color: var(--text-inverse);
    border-color: #1877f2;
}

.share-btn-compact.share-twitter:hover {
    background: #1da1f2;
    color: var(--text-inverse);
    border-color: #1da1f2;
}

.share-btn-compact.share-linkedin:hover {
    background: #0077b5;
    color: var(--text-inverse);
    border-color: #0077b5;
}

.share-btn-compact.share-whatsapp:hover {
    background: #25d366;
    color: var(--text-inverse);
    border-color: #25d366;
}

.share-btn-compact.share-telegram:hover {
    background: #0088cc;
    color: var(--text-inverse);
    border-color: #0088cc;
}

/* ============================================
   ENHANCED CONTENT
   ============================================ */
.entry-content-enhanced {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    color: var(--text-primary);
    margin-bottom: var(--space-2xl);
}

.entry-content-enhanced p {
    margin: 0 0 var(--space-lg) 0;
}

.entry-content-enhanced h2,
.entry-content-enhanced h3,
.entry-content-enhanced h4 {
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-lg);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--text-primary);
}

.entry-content-enhanced h2 {
    font-size: var(--font-size-3xl);
}

.entry-content-enhanced h3 {
    font-size: var(--font-size-2xl);
}

.entry-content-enhanced h4 {
    font-size: var(--font-size-xl);
}

.entry-content-enhanced img.content-image,
.entry-content-enhanced img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: var(--space-xl) 0;
    box-shadow: var(--shadow-md);
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
}

.entry-content-enhanced figure {
    margin: var(--space-xl) 0;
}

.entry-content-enhanced figure img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
}

.entry-content-enhanced blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: var(--space-lg);
    margin: var(--space-xl) 0;
    font-style: italic;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
}

.entry-content-enhanced ul,
.entry-content-enhanced ol {
    margin: var(--space-lg) 0;
    padding-left: var(--space-2xl);
}

.entry-content-enhanced li {
    margin-bottom: var(--space-sm);
}

.entry-content-enhanced a {
    color: var(--primary-color);
    text-decoration: underline;
    transition: color var(--transition-base);
}

.entry-content-enhanced a:hover {
    color: var(--primary-dark);
}

.page-links-enhanced {
    margin: var(--space-xl) 0;
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.page-links-enhanced .page-number {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    margin: 0 var(--space-xs);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all var(--transition-base);
}

.page-links-enhanced .page-number:hover {
    background: var(--primary-color);
    color: var(--text-inverse);
    border-color: var(--primary-color);
}

/* ============================================
   ENGAGEMENT ACTIONS
   ============================================ */
.entry-engagement {
    display: flex;
    gap: var(--space-md);
    margin: var(--space-2xl) 0;
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    flex-wrap: wrap;
}

.engagement-item {
    flex: 1;
    min-width: 120px;
}

/* ============================================
   ENHANCED FOOTER
   ============================================ */
.entry-footer-enhanced {
    margin-top: var(--space-3xl);
    padding-top: var(--space-2xl);
    border-top: 2px solid var(--border-light);
}

.entry-tags-enhanced {
    margin-bottom: var(--space-2xl);
}

.tags-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
}

.tags-list-enhanced {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.tag-link-enhanced {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
}

.tag-link-enhanced:hover {
    background: var(--primary-color);
    color: var(--text-inverse);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hashtag-symbol {
    color: var(--primary-color);
    font-weight: var(--font-weight-bold);
}

.tag-link-enhanced:hover .hashtag-symbol {
    color: var(--text-inverse);
}

.social-share-enhanced {
    margin-top: var(--space-2xl);
    padding: var(--space-2xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.social-share-title-enhanced {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
}

.share-counts-enhanced {
    margin-bottom: var(--space-lg);
}

.social-share-buttons-enhanced {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-md);
}

.social-btn-enhanced {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-primary);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-base);
    font-size: var(--font-size-sm);
}

.social-btn-enhanced:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.social-btn-enhanced.social-facebook:hover {
    background: #1877f2;
    color: var(--text-inverse);
    border-color: #1877f2;
}

.social-btn-enhanced.social-twitter:hover {
    background: #1da1f2;
    color: var(--text-inverse);
    border-color: #1da1f2;
}

.social-btn-enhanced.social-linkedin:hover {
    background: #0077b5;
    color: var(--text-inverse);
    border-color: #0077b5;
}

.social-btn-enhanced.social-whatsapp:hover {
    background: #25d366;
    color: var(--text-inverse);
    border-color: #25d366;
}

.social-btn-enhanced.social-telegram:hover {
    background: #0088cc;
    color: var(--text-inverse);
    border-color: #0088cc;
}

/* ============================================
   ENHANCED RELATED POSTS SECTION
   ============================================ */
.related-posts-section-enhanced {
    margin: var(--space-3xl) 0;
    padding: var(--space-2xl) 0;
    border-top: 2px solid var(--border-light);
    border-bottom: 2px solid var(--border-light);
}

.related-posts-header {
    margin-bottom: var(--space-2xl);
    text-align: center;
}

.related-posts-title-enhanced {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin: 0 0 var(--space-sm) 0;
}

.related-posts-title-enhanced svg {
    color: var(--primary-color);
}

.related-posts-subtitle {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin: 0;
}

/* Grid Layout */
.related-posts-container-enhanced.related-posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

/* Carousel Layout */
.related-posts-container-enhanced.related-posts-carousel {
    display: flex;
    gap: var(--space-xl);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    padding-bottom: var(--space-md);
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) var(--bg-secondary);
}

.related-posts-container-enhanced.related-posts-carousel::-webkit-scrollbar {
    height: 8px;
}

.related-posts-container-enhanced.related-posts-carousel::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
}

.related-posts-container-enhanced.related-posts-carousel::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: var(--radius-full);
}

.related-posts-container-enhanced.related-posts-carousel .related-post-card-enhanced {
    flex: 0 0 calc(33.333% - var(--space-xl));
    min-width: 300px;
    scroll-snap-align: start;
}

/* Masonry Layout */
.related-posts-container-enhanced.related-posts-masonry {
    column-count: 3;
    column-gap: var(--space-xl);
}

.related-posts-container-enhanced.related-posts-masonry .related-post-card-enhanced {
    break-inside: avoid;
    margin-bottom: var(--space-xl);
}

/* Related Post Card */
.related-post-card-enhanced {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--border-light);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.related-post-card-enhanced:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.related-post-link-enhanced {
    display: flex;
    flex-direction: column;
    height: 100%;
    text-decoration: none;
    color: inherit;
}

.related-post-thumbnail {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 aspect ratio */
    overflow: hidden;
    background: var(--bg-tertiary);
}

.thumbnail-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.related-post-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform var(--transition-slow);
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    position: absolute;
    top: 0;
    left: 0;
}

.related-post-card-enhanced:hover .related-post-image {
    transform: scale(1.1);
}

.thumbnail-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.related-post-card-enhanced:hover .thumbnail-overlay {
    opacity: 1;
}

.thumbnail-overlay svg {
    color: var(--text-inverse);
    width: 48px;
    height: 48px;
}

.related-post-category {
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
    background: var(--primary-color);
    color: var(--text-inverse);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 2;
    box-shadow: var(--shadow-md);
}

.related-post-content {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.related-post-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--text-primary);
    margin: 0 0 var(--space-sm) 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color var(--transition-base);
}

.related-post-link-enhanced:hover .related-post-title {
    color: var(--primary-color);
}

.related-post-excerpt {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-normal);
    color: var(--text-secondary);
    margin: 0 0 var(--space-md) 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.related-post-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    margin-top: auto;
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-light);
}

.related-post-date,
.related-post-views {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.related-post-date svg,
.related-post-views svg {
    width: 14px;
    height: 14px;
    opacity: 0.7;
}

/* Carousel Navigation */
.related-posts-navigation {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.related-posts-prev,
.related-posts-next {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.related-posts-prev:hover,
.related-posts-next:hover {
    background: var(--primary-color);
    color: var(--text-inverse);
    border-color: var(--primary-color);
    transform: scale(1.1);
}

.related-posts-prev:disabled,
.related-posts-next:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .entry-title-enhanced {
        font-size: var(--font-size-3xl);
    }
    
    .entry-summary-enhanced {
        font-size: var(--font-size-lg);
    }
    
    .related-posts-container-enhanced.related-posts-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .related-posts-container-enhanced.related-posts-masonry {
        column-count: 2;
    }
    
    .related-posts-container-enhanced.related-posts-carousel .related-post-card-enhanced {
        flex: 0 0 calc(50% - var(--space-xl));
    }
}

@media (max-width: 768px) {
    .entry-title-enhanced {
        font-size: var(--font-size-2xl);
    }
    
    .entry-summary-enhanced {
        font-size: var(--font-size-base);
    }
    
    .entry-meta-enhanced {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .entry-share-top-enhanced {
        width: 100%;
        justify-content: space-between;
    }
    
    .meta-group {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }
    
    .related-posts-container-enhanced.related-posts-grid {
        grid-template-columns: 1fr;
    }
    
    .related-posts-container-enhanced.related-posts-masonry {
        column-count: 1;
    }
    
    .related-posts-container-enhanced.related-posts-carousel .related-post-card-enhanced {
        flex: 0 0 calc(100% - var(--space-xl));
        min-width: 280px;
    }
    
    .social-share-buttons-enhanced {
        grid-template-columns: 1fr;
    }
    
    .post-featured-image {
        padding-top: 62.5%; /* 16:10 for mobile */
    }
}

@media (max-width: 480px) {
    .entry-title-enhanced {
        font-size: var(--font-size-xl);
    }
    
    .related-posts-title-enhanced {
        font-size: var(--font-size-2xl);
    }
    
    .share-buttons-compact-enhanced {
        flex-wrap: wrap;
    }
    
    .share-btn-compact {
        width: 36px;
        height: 36px;
    }
}

/* ============================================
   LOADING STATES
   ============================================ */
.related-post-card-enhanced {
    animation: fadeInUp 0.5s ease-out;
}

.related-post-card-enhanced:nth-child(1) { animation-delay: 0.1s; }
.related-post-card-enhanced:nth-child(2) { animation-delay: 0.2s; }
.related-post-card-enhanced:nth-child(3) { animation-delay: 0.3s; }
.related-post-card-enhanced:nth-child(4) { animation-delay: 0.4s; }
.related-post-card-enhanced:nth-child(5) { animation-delay: 0.5s; }
.related-post-card-enhanced:nth-child(6) { animation-delay: 0.6s; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   IMAGE ERROR HANDLING
   ============================================ */
.related-post-image[src=""],
.related-post-image:not([src]) {
    display: none;
}

.thumbnail-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    z-index: -1;
}

/* ============================================
   READING PROGRESS BAR
   ============================================ */
.reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 4px;
    background: var(--primary-color);
    z-index: 9999;
    transition: width 0.1s ease-out;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* ============================================
   SCROLL TO TOP BUTTON
   ============================================ */
.scroll-to-top-btn {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 9998;
}

.scroll-to-top-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.scroll-to-top-btn:active {
    transform: translateY(-2px);
}

.scroll-to-top-btn svg {
    width: 24px;
    height: 24px;
}

@media (max-width: 768px) {
    .scroll-to-top-btn {
        bottom: var(--space-lg);
        right: var(--space-lg);
        width: 44px;
        height: 44px;
    }
    
    .scroll-to-top-btn svg {
        width: 20px;
        height: 20px;
    }
}