/**
 * QuantStock Backtesting Page - SEO Content Styles
 * =================================================
 * 
 * This stylesheet provides styling for SEO-focused content sections
 * that improve content depth for search rankings and provide natural
 * insertion points for AdSense auto-ads.
 * 
 * File: /static/css/backtesting_seo.css
 */

/* ================================================================
   SEO INTRO SECTION
   Above-fold content with keyword-rich H1
   ================================================================ */

.seo-intro {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(99, 102, 241, 0.03));
    border-radius: var(--border-radius, 0.5rem);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color, #e5e7eb);
}

.seo-intro h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-dark, #1e293b);
    margin: 0 0 0.75rem 0;
    line-height: 1.3;
}

.seo-intro p {
    color: var(--text-color, #334155);
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.6;
}

.quick-stats {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.quick-stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-light, #64748b);
}

.quick-stat i {
    color: var(--primary-color, #2563eb);
}

/* Dark mode */
.dark-mode .seo-intro {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(99, 102, 241, 0.05));
}

.dark-mode .seo-intro h1 {
    color: var(--text-dark, #f8fafc);
}

/* ================================================================
   BREADCRUMB NAVIGATION
   Improves site hierarchy signals for SEO
   ================================================================ */

.breadcrumb-nav {
    padding: 0.75rem 0;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.breadcrumb-nav a {
    color: var(--text-light, #64748b);
    text-decoration: none;
    transition: color 0.2s ease;
}

.breadcrumb-nav a:hover {
    color: var(--primary-color, #2563eb);
}

.breadcrumb-nav span {
    color: var(--text-color, #334155);
}

.breadcrumb-nav .mx-2 {
    margin: 0 0.5rem;
    color: var(--text-light, #64748b);
}

/* ================================================================
   SEO CONTENT SECTIONS
   Educational content for improved search rankings
   ================================================================ */

.seo-section {
    background-color: var(--card-bg, #ffffff);
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: var(--border-radius, 0.5rem);
    padding: 2rem;
    margin-top: 2rem;
}

.seo-section h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark, #1e293b);
    margin: 0 0 1rem 0;
    display: flex;
    align-items: center;
}

.seo-section h2 i {
    color: var(--primary-color, #2563eb);
}

.seo-section h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark, #1e293b);
    margin: 1.5rem 0 0.75rem 0;
}

.seo-section p {
    color: var(--text-color, #334155);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.seo-section strong {
    color: var(--text-dark, #1e293b);
}

/* Dark mode for sections */
.dark-mode .seo-section {
    background-color: var(--card-bg, #1e293b);
}

.dark-mode .seo-section h2,
.dark-mode .seo-section h3,
.dark-mode .seo-section strong {
    color: var(--text-dark, #f8fafc);
}

/* ================================================================
   INDICATOR CARDS
   Grid of technical indicator descriptions with links
   ================================================================ */

.indicator-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.indicator-card {
    background-color: var(--bg-color, #ffffff);
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: var(--border-radius, 0.5rem);
    padding: 1rem;
    transition: all 0.3s ease;
}

.indicator-card:hover {
    border-color: var(--primary-color, #2563eb);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.indicator-card h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0 0 0.5rem 0;
    color: var(--primary-color, #2563eb);
    display: flex;
    align-items: center;
}

.indicator-card h4 i {
    margin-right: 0.5rem;
}

.indicator-card p {
    font-size: 0.85rem;
    color: var(--text-light, #64748b);
    margin: 0 0 0.75rem 0;
    line-height: 1.5;
}

.indicator-card a {
    color: var(--primary-color, #2563eb);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.indicator-card a:hover {
    text-decoration: underline;
}

/* Dark mode for indicator cards */
.dark-mode .indicator-card {
    background-color: var(--light-color, #1e293b);
}

.dark-mode .indicator-card h4 {
    color: var(--primary-light, #60a5fa);
}

/* ================================================================
   FAQ SECTION
   Collapsible FAQ items with schema markup support
   ================================================================ */

.faq-item {
    border-bottom: 1px solid var(--border-color, #e5e7eb);
    padding: 1rem 0;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    font-weight: 600;
    color: var(--text-dark, #1e293b);
    margin-bottom: 0.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color 0.2s ease;
}

.faq-question:hover {
    color: var(--primary-color, #2563eb);
}

.faq-question i {
    color: var(--text-light, #64748b);
    transition: transform 0.3s ease;
}

.faq-item.expanded .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    color: var(--text-color, #334155);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Collapsible FAQ (optional JavaScript enhancement) */
.faq-answer.collapsed {
    display: none;
}

/* Dark mode for FAQ */
.dark-mode .faq-question {
    color: var(--text-dark, #f8fafc);
}

/* ================================================================
   RELATED LINKS
   Internal link buttons for improved site structure
   ================================================================ */

.related-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1rem;
}

.related-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: var(--light-color, #f3f4f6);
    border-radius: var(--border-radius, 0.5rem);
    color: var(--text-color, #334155);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.related-link:hover {
    background-color: var(--primary-color, #2563eb);
    color: white;
}

.related-link i {
    font-size: 0.9rem;
}

/* Dark mode for related links */
.dark-mode .related-link {
    background-color: var(--light-color, #1e293b);
    color: var(--text-color, #e2e8f0);
}

.dark-mode .related-link:hover {
    background-color: var(--primary-color, #3b82f6);
}

/* ================================================================
   TABLE OF CONTENTS (Optional Sticky Nav)
   Improves navigation and session duration
   ================================================================ */

.toc {
    position: sticky;
    top: 80px;
    background-color: var(--card-bg, #ffffff);
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: var(--border-radius, 0.5rem);
    padding: 1rem;
    margin-bottom: 1rem;
}

.toc-title {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    color: var(--text-dark, #1e293b);
}

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

.toc-list li {
    margin-bottom: 0.5rem;
}

.toc-list a {
    color: var(--text-light, #64748b);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.2s ease;
    display: block;
    padding: 0.25rem 0;
}

.toc-list a:hover,
.toc-list a.active {
    color: var(--primary-color, #2563eb);
}

/* Dark mode for TOC */
.dark-mode .toc {
    background-color: var(--card-bg, #1e293b);
}

.dark-mode .toc-title {
    color: var(--text-dark, #f8fafc);
}

/* ================================================================
   RESPONSIVE ADJUSTMENTS
   Ensure content works well on mobile devices
   ================================================================ */

@media (max-width: 768px) {
    .seo-intro h1 {
        font-size: 1.4rem;
    }
    
    .quick-stats {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .seo-section {
        padding: 1.25rem;
    }
    
    .seo-section h2 {
        font-size: 1.25rem;
    }
    
    .indicator-cards {
        grid-template-columns: 1fr;
    }
    
    .related-links {
        flex-direction: column;
    }
    
    .related-link {
        justify-content: center;
    }
    
    .toc {
        position: relative;
        top: 0;
    }
}

@media (max-width: 480px) {
    .seo-intro {
        padding: 1rem;
    }
    
    .seo-intro h1 {
        font-size: 1.2rem;
    }
    
    .seo-section h3 {
        font-size: 1rem;
    }
}

/* ================================================================
   PRINT STYLES
   Ensure content prints well for users who want to save
   ================================================================ */

@media print {
    .seo-section {
        page-break-inside: avoid;
        border: 1px solid #ddd;
    }
    
    .indicator-card {
        break-inside: avoid;
    }
    
    .related-link {
        background-color: #f5f5f5;
        color: #333;
    }
    
    .toc {
        position: relative;
        top: 0;
    }
}

/* ================================================================
   ACCESSIBILITY ENHANCEMENTS
   Ensure content is accessible to all users
   ================================================================ */

/* Focus styles for keyboard navigation */
.related-link:focus,
.indicator-card a:focus,
.toc-list a:focus {
    outline: 2px solid var(--primary-color, #2563eb);
    outline-offset: 2px;
}

/* Reduced motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    .indicator-card,
    .related-link,
    .faq-question i {
        transition: none;
    }
    
    .indicator-card:hover {
        transform: none;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .seo-section {
        border-width: 2px;
    }
    
    .indicator-card {
        border-width: 2px;
    }
    
    .faq-item {
        border-bottom-width: 2px;
    }
}