/* Interactive Blog Features CSS */

/* Reading Progress Bar */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    z-index: 9999;
    transition: width 0.1s ease;
}

/* Table of Contents */
.toc-container {
    background: linear-gradient(135deg, rgba(37, 150, 190, 0.05), rgba(240, 130, 50, 0.05));
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 8px;
    /* Removed sticky positioning to prevent overlay issues */
}

.toc-container h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.toc-container h3 i {
    color: var(--accent-color);
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-list li {
    margin-bottom: 0.75rem;
}

.toc-list a {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    display: block;
    border-radius: 6px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.toc-list a:hover {
    background: var(--primary-color);
    color: var(--white);
    padding-left: 1rem;
}

.toc-list a.active {
    background: var(--primary-color);
    color: var(--white);
}

/* Key Takeaways Box */
.key-takeaways {
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
    border: 2px solid var(--primary-color);
    border-radius: 12px;
    padding: 2rem;
    margin: 2.5rem 0;
    box-shadow: 0 4px 6px rgba(37, 150, 190, 0.1);
}

.key-takeaways h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.key-takeaways h3 i {
    font-size: 1.8rem;
    color: var(--accent-color);
}

.key-takeaways ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.key-takeaways li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    line-height: 1.7;
}

.key-takeaways li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-size: 1.1rem;
}

/* Expandable Sections */
.expandable-section {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin: 1.5rem 0;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: box-shadow 0.3s ease;
}

.expandable-section:hover {
    box-shadow: var(--shadow-lg);
}

.expandable-header {
    background: linear-gradient(135deg, var(--light-color), #fff);
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    transition: background 0.3s ease;
}

.expandable-header:hover {
    background: var(--light-color);
}

.expandable-header h3 {
    margin: 0;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.expandable-header i {
    color: var(--primary-color);
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.expandable-section.active .expandable-header i {
    transform: rotate(180deg);
}

.expandable-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease, padding 0.5s ease;
    padding: 0 1.5rem;
}

.expandable-section.active .expandable-content {
    max-height: 5000px;
    padding: 1.5rem;
}

/* Interactive Comparison Table */
.interactive-table {
    width: 100%;
    margin: 2rem 0;
    border-collapse: separate;
    border-spacing: 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.interactive-table thead {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

.interactive-table th {
    padding: 1.25rem;
    text-align: left;
    font-weight: 600;
    font-size: 1.05rem;
}

.interactive-table tbody tr {
    background: var(--white);
    transition: all 0.3s ease;
}

.interactive-table tbody tr:nth-child(even) {
    background: var(--light-color);
}

.interactive-table tbody tr:hover {
    background: rgba(37, 150, 190, 0.1);
    transform: scale(1.01);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.interactive-table td {
    padding: 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.interactive-table .highlight {
    background: linear-gradient(135deg, rgba(37, 150, 190, 0.1), rgba(240, 130, 50, 0.1));
    font-weight: 600;
    color: var(--primary-color);
}

/* Info Boxes */
.info-box {
    background: #fff;
    border-left: 4px solid;
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 0 8px 8px 0;
    box-shadow: var(--shadow);
}

.info-box.tip {
    border-color: var(--success-color);
    background: linear-gradient(135deg, #f0fdf4, #dcfce7);
}

.info-box.warning {
    border-color: #f59e0b;
    background: linear-gradient(135deg, #fffbeb, #fef3c7);
}

.info-box.important {
    border-color: #ef4444;
    background: linear-gradient(135deg, #fef2f2, #fee2e2);
}

.info-box.note {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
}

.info-box h4 {
    margin-top: 0;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-box.tip h4 { color: var(--success-color); }
.info-box.warning h4 { color: #f59e0b; }
.info-box.important h4 { color: #ef4444; }
.info-box.note h4 { color: var(--primary-color); }

/* Quick Actions Bar */
.quick-actions {
    position: fixed;
    right: 2rem;
    bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 1000;
}

.quick-action-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 4px 12px rgba(37, 150, 190, 0.4);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}

.quick-action-btn.visible {
    opacity: 1;
    transform: translateY(0);
}

.quick-action-btn:hover {
    transform: scale(1.1) translateY(-3px);
    box-shadow: 0 6px 16px rgba(37, 150, 190, 0.6);
}

/* Stats Counter */
.blog-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2.5rem 0;
}

.stat-card {
    background: linear-gradient(135deg, var(--white), var(--light-color));
    border: 2px solid var(--primary-color);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-card .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-card .stat-label {
    color: var(--neutral-600);
    font-size: 0.95rem;
    font-weight: 600;
}

/* Related Articles */
.related-articles {
    background: var(--light-color);
    border-radius: 12px;
    padding: 2rem;
    margin: 3rem 0;
}

.related-articles h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.related-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    display: block;
}

.related-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.related-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.related-card-content {
    padding: 1.25rem;
}

.related-card h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.related-card p {
    color: var(--neutral-600);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.related-card .read-more {
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.9rem;
}

/* Social Share (Visual Only) */
.share-section {
    background: var(--light-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 2.5rem 0;
    text-align: center;
}

.share-section h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.share-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.share-btn {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
}

.share-btn:hover {
    transform: scale(1.15);
}

.share-btn.facebook { background: #1877f2; }
.share-btn.twitter { background: #1da1f2; }
.share-btn.linkedin { background: #0a66c2; }
.share-btn.email { background: #ea4335; }
.share-btn.print { background: #666; }

/* Mobile Responsive */
@media (max-width: 768px) {
    .toc-container {
        position: relative;
        top: 0;
    }
    
    .quick-actions {
        right: 1rem;
        bottom: 1rem;
    }
    
    .quick-action-btn {
        width: 45px;
        height: 45px;
        font-size: 1rem;
    }
    
    .blog-stats {
        grid-template-columns: 1fr;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
}

/* Print Styles */
@media print {
    .reading-progress,
    .toc-container,
    .quick-actions,
    .share-section,
    .related-articles,
    header,
    footer {
        display: none !important;
    }
    
    .article-content {
        max-width: 100%;
    }
}