/* ============================================
   DIAGAPNEE — Blog Styles
   Reuses design tokens from styles.css
   ============================================ */

/* === BLOG HERO (listing page) === */
.blog-hero {
    background: linear-gradient(180deg, var(--white) 0%, var(--blue-50) 100%);
    padding: 8rem 5% 3rem;
    text-align: center;
}

.blog-hero .section-title {
    max-width: 700px;
    margin: 0 auto 1rem;
}

.blog-hero .section-subtitle {
    max-width: 550px;
    margin: 0 auto;
}

/* === CATEGORY FILTERS === */
.blog-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0 5% 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.filter-btn {
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-full);
    border: 1.5px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-600);
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.filter-btn:hover {
    border-color: var(--blue-400);
    color: var(--blue-500);
}

.filter-btn.active {
    background: var(--blue-500);
    border-color: var(--blue-500);
    color: var(--white);
}

/* === BLOG GRID (listing page) === */
.blog-listing {
    padding: 0 5% 4rem;
    max-width: 1200px;
    margin: 0 auto;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* === BLOG CARD === */
.blog-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.blog-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--blue-400), var(--blue-600));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.blog-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.blog-card:hover::before {
    transform: scaleX(1);
}

.blog-card__category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--blue-100);
    color: var(--blue-600);
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    align-self: flex-start;
}

.blog-card__title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--gray-800);
    line-height: 1.35;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card__excerpt {
    font-size: 0.9rem;
    color: var(--gray-500);
    line-height: 1.6;
    margin-bottom: 1rem;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card__meta {
    font-size: 0.8rem;
    color: var(--gray-400);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.blog-card__meta svg {
    width: 14px;
    height: 14px;
    opacity: 0.5;
}

/* === BLOG CTA SECTION === */
.blog-cta-section {
    text-align: center;
    padding: 4rem 5%;
    background: linear-gradient(180deg, var(--blue-50) 0%, var(--white) 100%);
}

.blog-cta-section h2 {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 4vw, 2rem);
    color: var(--gray-800);
    margin-bottom: 0.75rem;
}

.blog-cta-section p {
    color: var(--gray-500);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

/* ============================================
   ARTICLE PAGE STYLES
   ============================================ */

/* === BREADCRUMB === */
.breadcrumb {
    position: static;
    width: auto;
    height: auto;
    z-index: auto;
    max-width: 800px;
    margin: 0 auto;
    padding: 6rem 5% 0;
    font-size: 0.85rem;
    color: var(--gray-400);
}

.breadcrumb a {
    color: var(--gray-400);
    text-decoration: none;
    transition: color 0.2s;
}

.breadcrumb a:hover {
    color: var(--blue-500);
}

/* === ARTICLE LAYOUT === */
.blog-article {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 5% 4rem;
}

/* Critical: override global section padding */
.blog-article section {
    padding: 0;
    overflow: visible;
}

/* === ARTICLE HEADER === */
.article-header {
    text-align: center;
    margin-bottom: 2.5rem;
    padding-top: 2rem;
}

.article-category {
    display: inline-block;
    padding: 0.3rem 0.9rem;
    background: var(--blue-100);
    color: var(--blue-600);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.25rem;
}

.article-header h1 {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 5vw, 2.6rem);
    font-weight: 700;
    color: var(--gray-800);
    line-height: 1.2;
    margin-bottom: 1.25rem;
}

.article-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    font-size: 0.9rem;
    color: var(--gray-400);
}

.article-meta span::before {
    content: '\00B7';
    margin-right: 1rem;
}

.article-meta span:first-child::before {
    display: none;
}

/* === ARTICLE INTRO (GEO "answer first") === */
.article-intro {
    font-size: 1.1rem;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 2rem;
    border-left: 4px solid var(--blue-400);
    padding-left: 1.5rem;
}

.article-intro strong {
    color: var(--gray-800);
}

/* === KEY TAKEAWAY BOX === */
.key-takeaway {
    background: var(--blue-50);
    border: 1px solid var(--blue-200);
    border-radius: var(--radius-lg);
    padding: 1.5rem 2rem;
    margin-bottom: 2.5rem;
}

.key-takeaway h4 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    color: var(--blue-600);
    margin-bottom: 0.75rem;
}

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

.key-takeaway li {
    color: var(--gray-700);
    line-height: 1.7;
    padding: 0.25rem 0 0.25rem 1.5rem;
    position: relative;
}

.key-takeaway li::before {
    content: '\2713';
    position: absolute;
    left: 0;
    color: var(--blue-500);
    font-weight: 700;
}

/* === TABLE OF CONTENTS === */
.toc {
    position: static;
    width: auto;
    height: auto;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 1.5rem 2rem;
    margin-bottom: 3rem;
    z-index: auto;
}

.toc h4 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-400);
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.toc ol {
    padding-left: 1.25rem;
    margin: 0;
}

.toc a {
    color: var(--blue-500);
    text-decoration: none;
    font-size: 0.95rem;
    line-height: 2;
    font-weight: 500;
    transition: color 0.2s;
}

.toc a:hover {
    color: var(--blue-600);
    text-decoration: underline;
}

/* === ARTICLE BODY TYPOGRAPHY === */
.blog-article h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-800);
    margin: 3rem 0 1.25rem;
    line-height: 1.3;
    padding-left: 0.85rem;
    border-left: 3px solid var(--blue-400);
}

.blog-article h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--gray-700);
    margin: 2rem 0 0.75rem;
}

.blog-article p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--gray-600);
    margin-bottom: 1.25rem;
}

.blog-article ul,
.blog-article ol {
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.blog-article li {
    line-height: 1.8;
    margin-bottom: 0.4rem;
    color: var(--gray-600);
}

.blog-article strong {
    color: var(--gray-800);
}

.blog-article a {
    color: var(--blue-500);
    text-decoration: underline;
    text-decoration-color: var(--blue-200);
    text-underline-offset: 2px;
    transition: text-decoration-color 0.2s;
}

.blog-article a:hover {
    text-decoration-color: var(--blue-500);
}

.blog-article table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    font-size: 0.95rem;
}

.blog-article th {
    background: var(--blue-50);
    color: var(--gray-800);
    font-weight: 600;
    padding: 0.875rem 1rem;
    text-align: left;
    font-size: 0.9rem;
}

.blog-article td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--gray-200);
    color: var(--gray-600);
}

.blog-article tr:last-child td {
    border-bottom: none;
}

.blog-article blockquote {
    background: var(--blue-50);
    border-left: 4px solid var(--blue-500);
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.blog-article blockquote p {
    font-style: italic;
    color: var(--gray-700);
    margin-bottom: 0;
}

/* === MID-ARTICLE CTA === */
.article-cta {
    background: linear-gradient(135deg, var(--blue-50), var(--blue-100));
    border: 1px solid var(--blue-200);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    text-align: center;
    margin: 3rem 0;
}

.article-cta h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    color: var(--gray-800);
    margin: 0 0 0.75rem;
    border: none;
    padding: 0;
}

.article-cta p {
    color: var(--gray-500);
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.article-cta--final {
    background: linear-gradient(135deg, var(--blue-600), var(--blue-800));
    border: none;
}

.article-cta--final h3 {
    color: var(--white);
}

.article-cta--final p {
    color: rgba(255, 255, 255, 0.8);
}

/* === ARTICLE FAQ === */
.article-faq {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--gray-200);
}

.article-faq > h2 {
    border-left: none;
    padding-left: 0;
    text-align: center;
    margin-bottom: 1.5rem;
}

.faq-item {
    border-bottom: 1px solid var(--gray-200);
    padding: 1.25rem 0;
}

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

.faq-item h3 {
    font-family: var(--font-body);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 0 0 0.75rem;
    cursor: default;
}

.faq-item p {
    color: var(--gray-600);
    line-height: 1.7;
    margin: 0;
}

/* === SOURCES === */
.article-sources {
    background: var(--gray-50);
    border-radius: var(--radius-md);
    padding: 1.5rem 2rem;
    margin-top: 2.5rem;
}

.article-sources h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray-700);
    margin: 0 0 0.75rem;
    border: none;
    padding: 0;
}

.article-sources ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.article-sources li {
    padding: 0.3rem 0;
    font-size: 0.85rem;
}

.article-sources a {
    color: var(--blue-500);
    text-decoration: none;
}

.article-sources a:hover {
    text-decoration: underline;
}

/* === RELATED ARTICLES === */
.related-articles {
    margin-top: 3rem;
    padding-top: 2.5rem;
    border-top: 1px solid var(--gray-200);
}

.related-articles > h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    color: var(--gray-800);
    margin-bottom: 1.5rem;
    text-align: center;
    border: none;
    padding: 0;
}

.related-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.related-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-decoration: none;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.related-card h4 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    color: var(--gray-800);
    margin-bottom: 0.5rem;
    line-height: 1.35;
}

.related-card p {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin: 0;
    line-height: 1.5;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .blog-hero {
        padding: 7rem 5% 2rem;
    }

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

    .blog-filters {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 1rem;
        -webkit-overflow-scrolling: touch;
    }

    .filter-btn {
        flex-shrink: 0;
    }

    .breadcrumb {
        padding-top: 5rem;
        font-size: 0.8rem;
    }

    .article-header h1 {
        font-size: clamp(1.5rem, 6vw, 2rem);
    }

    .article-meta {
        flex-direction: column;
        gap: 0.25rem;
    }

    .article-meta span::before {
        display: none;
    }

    .article-intro {
        font-size: 1rem;
    }

    .key-takeaway {
        padding: 1.25rem 1.5rem;
    }

    .toc {
        padding: 1.25rem 1.5rem;
    }

    .blog-article h2 {
        font-size: 1.3rem;
    }

    .article-cta {
        padding: 2rem 1.5rem;
    }

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