/* ================================================================
   Santala Research — blog.css  (Premium Edition)
   ================================================================ */

/* ── Hero ──────────────────────────────────────────────────────── */
.blog-hero {
    padding-top: 140px;
    padding-bottom: 56px;
    text-align: center;
    position: relative;
}

.blog-hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4.5vw, 3rem);
    font-weight: 800;
    line-height: 1.12;
    margin-bottom: 16px;
    letter-spacing: -0.03em;
}

.blog-hero h1 span {
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.blog-hero .hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.02rem;
    max-width: 520px;
    margin: 0 auto;
    line-height: 1.75;
}

/* ── Filters ───────────────────────────────────────────────────── */
.blog-filters-section {
    padding: 0 0 36px;
}

#blog-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.filter-btn {
    padding: 7px 18px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 0.84rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.filter-btn:hover {
    border-color: rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
}

.filter-btn.active {
    background: rgba(0, 232, 255, 0.06);
    border-color: rgba(0, 232, 255, 0.15);
    color: var(--accent);
}

/* ── Article Grid ──────────────────────────────────────────────── */
#blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
    padding-bottom: 72px;
}

.blog-card {
    display: block;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.blog-card:hover h3 {
    color: var(--accent-light);
}

.blog-empty {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--text-muted);
    padding: 48px 0;
    font-size: 0.93rem;
}

/* ── Full Article View ─────────────────────────────────────────── */
#blog-article-view {
    padding-bottom: 72px;
}

.blog-article-full {
    max-width: 700px;
    margin: 0 auto;
}

.blog-back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-dim);
    font-size: 0.84rem;
    font-weight: 500;
    margin-bottom: 36px;
    transition: var(--transition);
    text-decoration: none;
}

.blog-back-link:hover {
    color: var(--accent);
    transform: translateX(-3px);
}

/* ── Article Header ────────────────────────────────────────────── */
.article-header {
    margin-bottom: 28px;
}

.article-header h1 {
    font-family: var(--font-display);
    font-size: clamp(1.4rem, 3.2vw, 2rem);
    font-weight: 700;
    line-height: 1.2;
    margin: 12px 0 18px;
    letter-spacing: -0.025em;
}

.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 0.76rem;
    color: var(--text-muted);
}

.meta-sep {
    color: rgba(255, 255, 255, 0.06);
}

/* ── Share Button ──────────────────────────────────────────────── */
.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: auto;
    padding: 5px 13px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.74rem;
    cursor: pointer;
    transition: var(--transition);
}

.share-btn:hover {
    border-color: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

/* ── Article Body ──────────────────────────────────────────────── */
.article-body {
    color: var(--text-primary);
    font-size: 0.98rem;
    line-height: 1.88;
}

.article-body p {
    margin-bottom: 18px;
}

.article-body h3 {
    font-family: var(--font-display);
    color: var(--accent);
    font-size: 1.05rem;
    font-weight: 700;
    margin: 32px 0 12px;
    letter-spacing: -0.01em;
}

.article-body strong {
    color: var(--text-primary);
    font-weight: 600;
}

.article-body a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: rgba(0, 232, 255, 0.3);
}

.article-body a:hover {
    color: var(--accent-light);
    text-decoration-color: var(--accent-light);
}

/* ── Related Articles ──────────────────────────────────────────── */
.related-articles {
    margin-top: 56px;
    padding-top: 36px;
    border-top: 1px solid var(--border);
}

.related-articles h4 {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 14px;
}

.related-card {
    display: block;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.related-card h3 {
    font-size: 0.88rem;
}

.related-card .card-excerpt {
    font-size: 0.8rem;
    -webkit-line-clamp: 2;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ── Newsletter Section ────────────────────────────────────────── */
.blog-newsletter {
    padding: 56px 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.blog-newsletter h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.blog-newsletter h3 span {
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.blog-newsletter p {
    color: var(--text-secondary);
    font-size: 0.93rem;
    margin-bottom: 22px;
}

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .blog-hero {
        padding-top: 120px;
        padding-bottom: 36px;
    }

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

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

    .article-meta {
        font-size: 0.72rem;
    }

    .share-btn {
        margin-left: 0;
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    #blog-filters {
        gap: 6px;
    }

    .filter-btn {
        padding: 6px 14px;
        font-size: 0.8rem;
    }
}