/* Professional hero treatment */
.hero-professional {
    background: var(--color-background);
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--color-border);
}

.hero-title {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
    line-height: 1.25;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.25rem);
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
    line-height: 1.5;
    font-weight: 400;
    max-width: 600px;
}

.hero-metrics {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    box-shadow: var(--card-shadow);
    min-height: 120px;
    position: relative;
    overflow: hidden;
    align-items: center;
}

.metric-badge {
    text-align: center;
}

.hero-metrics .metric-badge {
    position: relative;
    z-index: 1;
}

.metric-value {
    display: block;
    font-size: 1.625rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.2;
}

.metric-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

/* Base button styles */
.btn {
    display: inline-block;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: background-color var(--transition-fast), 
                border-color var(--transition-fast), 
                color var(--transition-fast),
                transform var(--transition-fast);
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--color-accent);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--color-accent-hover);
    color: white;
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    padding: 0.75rem 1.5rem;
}

.btn-secondary:hover,
.btn-secondary:focus {
    background: var(--color-surface);
    border-color: var(--color-link);
    color: var(--color-link);
}

.hero-background-svg {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 0;
    width: 450px;
    opacity: 0.4;
    transform: translate(20%, -20%) rotate(15deg);
}

/* Stats bar */
.stats-bar {
    background: var(--color-surface);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border);
}

.stats-row {
    display: flex;
    justify-content: center;
    gap: var(--space-xxl);
}

.stat {
    text-align: center;
}

.stat-number {
    font-weight: 600;
    color: var(--color-text);
    margin-right: 0.5rem;
}

.stat-text {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* Featured terms */
.featured-terms {
    padding: var(--space-xxl) 0;
    background: var(--color-background);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-text);
    text-align: center;
    margin-bottom: var(--space-xl);
}

.terms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.term-card {
    background: var(--color-surface);
    padding: var(--space-lg);
    border-radius: var(--radius-sm);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--color-border);
    min-height: 180px;
}

.term-category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-link);
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
}

.term-icon {
    width: 1.125rem;
    height: 1.125rem;
    flex-shrink: 0;
    display: inline-block;
    vertical-align: middle;
}

.term-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin: var(--space-xs) 0 var(--space-sm) 0;
}

.term-definition {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.5;
    margin-bottom: var(--space-md);
}

.term-link {
    font-size: 0.875rem;
    color: var(--color-link);
    font-weight: 500;
    text-decoration: none;
}

.term-link:hover {
    text-decoration: underline;
}

/* Learning paths icons */

.path-tile {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--space-lg);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.path-tile:hover {
    border-color: var(--color-link);
    box-shadow: var(--card-shadow);
}

.path-tile h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

/* Learning Path Visual Container */
.learning-path-visual-container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--space-lg) 0 var(--space-xl) 0;
    text-align: center;
}

.learning-path-visual-container svg {
    display: block;
    width: 100%;
    height: auto;
    pointer-events: none;
    user-select: none;
}

/* Screen reader only text */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .learning-path-visual-container svg,
    .learning-path-visual-container svg * {
        animation: none !important;
        transition: none !important;
    }
}

/* Credibility pillars */
.credibility-pillars {
    padding: var(--space-xxl) 0;
    background: var(--color-surface);
}

.pillars-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    max-width: 800px;
    margin: 0 auto;
}

.pillar {
    text-align: center;
}

.pillar-icon {
    width: 32px;
    height: 32px;
    color: var(--color-link);
    margin-bottom: var(--space-sm);
}

.pillar h3 {
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.pillar p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Make articles clearly secondary */
.featured-articles {
    background: var(--color-background);
    padding: var(--space-xl) 0;
}

.article-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    box-shadow: none; /* Flatter than term cards */
    transition: box-shadow 0.2s;
}

.article-card:hover {
    box-shadow: var(--card-shadow);
}

/* Final CTA */
.final-cta {
    padding: var(--space-xxl) 0;
    background: var(--color-background);
    text-align: center;
}

.cta-content h2 {
    font-size: 1.5rem;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.cta-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-top: var(--space-lg);
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1rem;
}

/* SEO content visible to crawlers, hidden on mobile */
.sr-only-mobile {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

@media (min-width: 1200px) {
    .seo-content {
        position: static;
        width: auto;
        height: auto;
        padding: var(--space-md) 0;
        margin: 0;
        overflow: visible;
        clip: auto;
        white-space: normal;
        font-size: 0.875rem;
        color: var(--color-text-muted);
        text-align: center;
    }
}

/* Mobile adjustments for learning path SVG */
@media (max-width: 768px) {
    .learning-path-visual-container {
        padding: var(--space-md) 0 var(--space-lg) 0;
    }
    
    .learning-path-visual-container svg {
        min-height: 150px;
    }
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .stats-row {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .terms-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-metrics {
        flex-direction: column;
    }
    
    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .pillars-grid {
        grid-template-columns: 1fr;
    }
}

/* --- FAQ Section --- */
.faq-section {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
}


.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
}

summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) 0;
    font-weight: 500;
    color: var(--color-text);
    cursor: pointer;
    list-style: none;
}

.faq-item p {
    color: var(--color-text-muted);
    line-height: 1.6;
    padding: 0 0 var(--space-lg) 0;
}

summary::-webkit-details-marker {
    display: none;
}

summary::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--color-link);
    transition: transform var(--transition-normal);
}

details[open] > summary::after {
    content: '−';
    transform: rotate(180deg);
}

/* Modern Card Redesign */
.card-modern {
    position: relative;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card-modern:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.card-header {
    margin-bottom: var(--space-md);
}

.card-category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-link);
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    margin-bottom: var(--space-xs);
}

.card-icon {
    width: 1.125rem;
    height: 1.125rem;
    flex-shrink: 0;
    display: inline-block;
    vertical-align: middle;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.3;
    margin: var(--space-xs) 0 0 0;
}

.card-title a {
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.2s ease;
}

.card-title a:hover {
    color: var(--color-link);
}

.term-card.card-modern .term-definition {
    margin-top: var(--space-sm);
}

.article-card.card-modern .article-excerpt {
    margin-top: var(--space-sm);
}