/* ===== LEARN HUB & SHARED BLOG STYLES ===== */

/* Page background override for full-bleed dark */
main:has(.learn-page) {
    background: var(--color-gray-950);
}

.learn-page {
    min-height: 100vh;
    background: var(--color-gray-950);
    padding-bottom: 80px;
}

.learn-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Hero */
.learn-hero {
    max-width: 1200px;
    margin: 0 auto;
    padding: 64px 24px 32px;
    text-align: center;
    animation: fadeUp 0.5s ease-out;
}

.learn-hero-category {
    padding: 48px 24px 24px;
}

.learn-hero-title {
    font-family: 'Sora', -apple-system, sans-serif;
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
}

.learn-hero-subtitle {
    font-family: 'Sora', -apple-system, sans-serif;
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Category Nav Chips */
.learn-categories-nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    justify-content: center;
    margin-bottom: var(--space-12);
    animation: fadeUp 0.5s ease-out 0.1s both;
}

.learn-category-chip {
    display: inline-block;
    padding: 10px 18px;
    border-radius: 8px;
    background: transparent;
    color: var(--color-text-tertiary);
    text-decoration: none;
    font-family: 'Sora', -apple-system, sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    border: none;
    transition: all 0.2s ease;
}

.learn-category-chip:hover {
    color: var(--color-text-primary);
    background: var(--color-gray-700);
}

.learn-category-chip:active,
.learn-category-chip.active {
    background: var(--color-primary);
    color: var(--color-gray-950);
    box-shadow: 0 2px 12px rgba(30, 251, 151, 0.4);
}

/* Category Section */
.learn-category-section {
    margin-bottom: var(--space-16);
    animation: fadeUp 0.5s ease-out 0.15s both;
}

.learn-category-header {
    margin-bottom: var(--space-6);
}

.learn-category-title {
    font-family: 'Sora', -apple-system, sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.learn-category-desc {
    font-family: 'Sora', -apple-system, sans-serif;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-2);
}

.learn-view-all {
    font-family: 'Sora', -apple-system, sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.learn-view-all:hover {
    color: var(--color-primary-300);
}

/* Article Card Grid */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-6);
}

/* Article Card */
.article-card {
    display: flex;
    flex-direction: column;
    background: var(--color-gray-900);
    border: 1px solid var(--color-border-light);
    border-radius: 16px;
    text-decoration: none;
    overflow: hidden;
    transition: all 0.2s ease;
}

.article-card:hover {
    border-color: var(--color-primary);
    background: var(--color-gray-800);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.article-card-image {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--color-gray-800);
}

.article-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-card-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.article-card-category {
    font-family: 'IBM Plex Mono', 'SF Mono', monospace;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.article-card-title {
    font-family: 'Sora', -apple-system, sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
    line-height: 1.35;
}

.article-card-description {
    font-family: 'Sora', -apple-system, sans-serif;
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    line-height: 1.6;
    margin-bottom: var(--space-4);
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-family: 'IBM Plex Mono', 'SF Mono', monospace;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--color-text-tertiary);
}

.article-card-dot {
    opacity: 0.4;
}

/* Empty State */
.learn-empty {
    text-align: center;
    padding: var(--space-16) 0;
    color: var(--color-text-tertiary);
    font-family: 'Sora', -apple-system, sans-serif;
    font-size: 0.95rem;
}

/* Hub Section */
.learn-hub {
    padding-bottom: var(--space-16);
}

/* Animations */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 900px) {
    .article-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
}

@media (max-width: 600px) {
    .learn-hero {
        padding: 40px 16px 24px;
    }

    .learn-container {
        padding: 0 16px;
    }

    .article-grid {
        grid-template-columns: 1fr;
    }

    .article-card-body {
        padding: 20px;
    }
}