/* ============================================
   STEMLAB BLOG — Styles
   Depends on stemlab-core.css design tokens
   ============================================ */


/* ═══════════════════════════════════════
   A. ARCHIVE / LISTING
   ═══════════════════════════════════════ */

.slblog-archive {
    padding: var(--space-8) 0 var(--space-16);
    min-height: 60vh;
}

/* Header */
.slblog-archive-header {
    text-align: center;
    padding: var(--space-12) 0 var(--space-8);
}
.slblog-archive-header h1 {
    font-size: var(--text-display);
    letter-spacing: var(--tracking-tight);
    margin-top: var(--space-3);
    color: var(--color-text-primary);
}
.slblog-archive-desc {
    color: var(--color-text-subdued);
    font-size: var(--text-body-lg);
    max-width: 540px;
    margin: var(--space-4) auto 0;
    line-height: var(--leading-relaxed);
}

/* Category pills */
.slblog-cat-filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-2);
    padding-bottom: var(--space-8);
}
.slblog-cat-pill {
    display: inline-flex;
    align-items: center;
    padding: var(--space-2) var(--space-5);
    border-radius: var(--radius-full);
    font-size: var(--text-body-sm);
    font-weight: var(--weight-medium);
    color: var(--color-text-secondary);
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    transition: all var(--duration-fast) var(--ease-standard);
    text-decoration: none;
}
.slblog-cat-pill:hover {
    color: var(--color-text-primary);
    border-color: var(--color-border-strong);
    background: var(--color-bg-elevated);
}
.slblog-cat-pill--active {
    color: var(--color-text-on-accent);
    background: var(--color-accent);
    border-color: var(--color-accent);
}
.slblog-cat-pill--active:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: var(--color-text-on-accent);
}


/* ═══════════════════════════════════════
   FEATURED POSTS
   ═══════════════════════════════════════ */

.slblog-featured {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--gap-lg);
    margin-bottom: var(--space-8);
}
.slblog-featured-card {
    display: flex;
    flex-direction: column;
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: all var(--duration-medium) var(--ease-standard);
}
.slblog-featured-card:hover {
    background: var(--color-bg-elevated);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(240, 23, 111, 0.08);
    transform: translateY(-2px);
    color: inherit;
}
.slblog-featured-card--hero {
    grid-column: 1 / -1;
    flex-direction: row;
}
.slblog-featured-img {
    flex-shrink: 0;
    overflow: hidden;
}
.slblog-featured-card--hero .slblog-featured-img {
    width: 55%;
}
.slblog-featured-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--duration-slow) var(--ease-standard);
}
.slblog-featured-card:hover .slblog-featured-img img {
    transform: scale(1.03);
}
.slblog-featured-content {
    padding: var(--card-padding-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--space-3);
}
.slblog-featured-content h2 {
    font-size: var(--text-h3);
    line-height: var(--leading-snug);
}
.slblog-featured-card--hero .slblog-featured-content h2 {
    font-size: var(--text-h2);
}

@media (max-width: 768px) {
    .slblog-featured {
        grid-template-columns: 1fr;
    }
    .slblog-featured-card--hero {
        flex-direction: column;
    }
    .slblog-featured-card--hero .slblog-featured-img {
        width: 100%;
    }
}


/* ═══════════════════════════════════════
   POST GRID
   ═══════════════════════════════════════ */

.slblog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap-lg);
}
@media (max-width: 1024px) {
    .slblog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 639px) {
    .slblog-grid {
        grid-template-columns: 1fr;
    }
}


/* ═══════════════════════════════════════
   POST CARD (shared: grid + related)
   ═══════════════════════════════════════ */

.slblog-card {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
    padding: 0;
    overflow: hidden;
}
.slblog-card:hover {
    color: inherit;
}
.slblog-card-img {
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    flex-shrink: 0;
}
.slblog-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--duration-slow) var(--ease-standard);
}
.slblog-card:hover .slblog-card-img img {
    transform: scale(1.04);
}
.slblog-card-img--placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-elevated);
    color: var(--color-text-disabled);
}
.slblog-card-img--placeholder svg {
    width: 48px;
    height: 48px;
}
.slblog-card-body {
    padding: var(--card-padding);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    flex-grow: 1;
}
.slblog-card-cat {
    font-size: var(--text-overline);
    font-weight: var(--weight-semibold);
    letter-spacing: var(--tracking-wider);
    text-transform: uppercase;
    color: var(--color-accent);
    text-decoration: none;
}
.slblog-card-title {
    font-size: var(--text-h4);
    font-weight: var(--weight-semibold);
    line-height: var(--leading-snug);
    color: var(--color-text-primary);
}
.slblog-card-excerpt {
    color: var(--color-text-subdued);
    font-size: var(--text-body-sm);
    line-height: var(--leading-relaxed);
}
.slblog-card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-caption);
    color: var(--color-text-disabled);
    margin-top: auto;
    padding-top: var(--space-2);
}
.slblog-meta-sep {
    opacity: 0.5;
}


/* ═══════════════════════════════════════
   PAGINATION
   ═══════════════════════════════════════ */

.slblog-pagination {
    padding-top: var(--space-12);
    display: flex;
    justify-content: center;
}
.slblog-pagination .page-numbers {
    list-style: none;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0;
    margin: 0;
}
.slblog-pagination .page-numbers li {
    list-style: none;
}
.slblog-pagination .page-numbers a,
.slblog-pagination .page-numbers span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-1);
    min-width: 40px;
    height: 40px;
    padding: 0 var(--space-3);
    border-radius: var(--radius-sm);
    font-size: var(--text-body-sm);
    font-weight: var(--weight-medium);
    color: var(--color-text-secondary);
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    text-decoration: none;
    transition: all var(--duration-fast) var(--ease-standard);
}
.slblog-pagination .page-numbers a:hover {
    background: var(--color-bg-elevated);
    border-color: var(--color-border-strong);
    color: var(--color-text-primary);
}
.slblog-pagination .page-numbers .current {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-text-on-accent);
}
.slblog-pagination .page-numbers a svg {
    flex-shrink: 0;
}


/* ═══════════════════════════════════════
   EMPTY STATE
   ═══════════════════════════════════════ */

.slblog-empty {
    text-align: center;
    padding: var(--space-24) 0;
}
.slblog-empty h2 {
    font-size: var(--text-h2);
    margin-bottom: var(--space-4);
}
.slblog-empty p {
    color: var(--color-text-subdued);
}


/* ═══════════════════════════════════════
   B. BREADCRUMBS
   ═══════════════════════════════════════ */

.slblog-breadcrumbs {
    padding: var(--space-4) 0 0;
}
.slblog-breadcrumbs ol {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-1);
    padding: 0;
    margin: 0;
    font-size: var(--text-caption);
}
.slblog-breadcrumbs li {
    display: inline-flex;
    align-items: center;
    color: var(--color-text-disabled);
}
.slblog-breadcrumbs li:not(:last-child)::after {
    content: '/';
    margin-left: var(--space-1);
    opacity: 0.4;
}
.slblog-breadcrumbs a {
    color: var(--color-text-subdued);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-standard);
}
.slblog-breadcrumbs a:hover {
    color: var(--color-accent);
}
.slblog-breadcrumb-current {
    color: var(--color-text-disabled);
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}


/* ═══════════════════════════════════════
   C. SINGLE POST
   ═══════════════════════════════════════ */

.slblog-single {
    padding: var(--space-8) 0 var(--space-16);
}

/* Header */
.slblog-single-header {
    text-align: center;
    max-width: 780px;
    margin: 0 auto;
    padding: var(--space-8) 0;
}
.slblog-single-header h1 {
    font-size: var(--text-display);
    letter-spacing: var(--tracking-tight);
    margin-top: var(--space-4);
    line-height: var(--leading-tight);
    color: var(--color-text-primary);
}
.slblog-single-meta {
    display: flex;
    justify-content: center;
    margin-top: var(--space-6);
}
.slblog-author-mini {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}
.slblog-avatar {
    border-radius: var(--radius-full);
    flex-shrink: 0;
}
.slblog-author-name {
    font-weight: var(--weight-semibold);
    color: var(--color-text-primary);
    font-size: var(--text-body-sm);
}
.slblog-date-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-caption);
    color: var(--color-text-subdued);
}
.slblog-updated {
    color: var(--color-text-disabled);
}

/* Hero Image */
.slblog-hero-img {
    max-width: 960px;
    margin: 0 auto var(--space-10);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.slblog-hero-img img {
    width: 100%;
    height: auto;
    display: block;
}

/* Content Layout: TOC sidebar + body */
.slblog-content-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: var(--space-12);
    max-width: 960px;
    margin: 0 auto;
}
/* If no TOC sidebar, single column centred */
.slblog-content-layout--no-toc {
    grid-template-columns: 1fr;
    max-width: 720px;
}

@media (max-width: 1024px) {
    .slblog-content-layout {
        grid-template-columns: 1fr;
        gap: 0;
    }
}

/* ── TOC Sidebar ── */
.slblog-toc-sidebar {
    position: sticky;
    top: 100px;
    align-self: start;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
}
@media (max-width: 1024px) {
    .slblog-toc-sidebar {
        position: static;
        max-height: none;
        margin-bottom: var(--space-8);
        padding: var(--card-padding);
        background: var(--color-bg-surface);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
    }
}

.slblog-toc {
    font-size: var(--text-body-sm);
}
.slblog-toc-title {
    font-size: var(--text-overline);
    font-weight: var(--weight-semibold);
    letter-spacing: var(--tracking-wider);
    text-transform: uppercase;
    color: var(--color-text-subdued);
    margin-bottom: var(--space-4);
}
.slblog-toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}
.slblog-toc-list li {
    list-style: none;
}
.slblog-toc-list a {
    display: block;
    padding: var(--space-1) var(--space-3);
    color: var(--color-text-subdued);
    text-decoration: none;
    border-left: 2px solid transparent;
    font-size: var(--text-body-sm);
    line-height: var(--leading-normal);
    transition: all var(--duration-fast) var(--ease-standard);
}
.slblog-toc-list a:hover {
    color: var(--color-text-primary);
    border-left-color: var(--color-border-strong);
}
.slblog-toc-list a.slblog-toc--active {
    color: var(--color-accent);
    border-left-color: var(--color-accent);
}
.slblog-toc-sub a {
    padding-left: var(--space-6);
    font-size: var(--text-caption);
}


/* ═══════════════════════════════════════
   POST BODY TYPOGRAPHY
   ═══════════════════════════════════════ */

.slblog-body {
    max-width: 720px;
    font-size: var(--text-body-lg);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
}

.slblog-body h2 {
    font-size: var(--text-h2);
    margin: var(--space-12) 0 var(--space-4);
    scroll-margin-top: 90px;
}
.slblog-body h3 {
    font-size: var(--text-h3);
    margin: var(--space-8) 0 var(--space-3);
    scroll-margin-top: 90px;
}
.slblog-body h4 {
    font-size: var(--text-h4);
    margin: var(--space-6) 0 var(--space-3);
}
.slblog-body p {
    margin-bottom: var(--space-5);
}
.slblog-body a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
}
.slblog-body a:hover {
    color: var(--color-accent-hover);
}
.slblog-body ul,
.slblog-body ol {
    margin-bottom: var(--space-5);
    padding-left: var(--space-6);
}
.slblog-body li {
    margin-bottom: var(--space-2);
}
.slblog-body blockquote {
    border-left: 3px solid var(--color-accent);
    padding: var(--space-4) var(--space-6);
    margin: var(--space-6) 0;
    background: var(--color-bg-surface);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    color: var(--color-text-subdued);
}
.slblog-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: var(--space-6) 0;
}
.slblog-body pre {
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--space-4) var(--space-5);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: var(--text-mono-sm);
    line-height: var(--leading-normal);
    margin-bottom: var(--space-5);
}
.slblog-body code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--color-bg-surface);
    padding: 2px 6px;
    border-radius: var(--radius-xs);
}
.slblog-body pre code {
    background: transparent;
    padding: 0;
}
.slblog-body table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-6) 0;
    font-size: var(--text-body-sm);
}
.slblog-body th,
.slblog-body td {
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--color-border);
    text-align: left;
}
.slblog-body th {
    background: var(--color-bg-surface);
    font-weight: var(--weight-semibold);
    color: var(--color-text-primary);
}
.slblog-body hr {
    border: none;
    height: 1px;
    background: var(--color-border);
    margin: var(--space-8) 0;
}
/* Embedded video / iframe */
.slblog-body iframe {
    max-width: 100%;
    border-radius: var(--radius-md);
    margin: var(--space-6) 0;
}
/* WordPress alignment classes */
.slblog-body .aligncenter {
    display: block;
    margin-left: auto;
    margin-right: auto;
}
.slblog-body .wp-caption {
    max-width: 100%;
}
.slblog-body .wp-caption-text {
    font-size: var(--text-caption);
    color: var(--color-text-disabled);
    text-align: center;
    margin-top: var(--space-2);
}


/* ═══════════════════════════════════════
   TAGS
   ═══════════════════════════════════════ */

.slblog-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    max-width: 720px;
    margin: var(--space-8) auto 0;
}
.slblog-tag {
    padding: var(--space-1) var(--space-4);
    border-radius: var(--radius-full);
    font-size: var(--text-caption);
    font-weight: var(--weight-medium);
    color: var(--color-text-subdued);
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    text-decoration: none;
    transition: all var(--duration-fast) var(--ease-standard);
}
.slblog-tag:hover {
    color: var(--color-accent);
    border-color: var(--color-accent-border);
}


/* ═══════════════════════════════════════
   AUTHOR BOX
   ═══════════════════════════════════════ */

.slblog-author-box {
    display: flex;
    align-items: flex-start;
    gap: var(--space-6);
    max-width: 720px;
    margin: var(--space-8) auto;
    padding: var(--card-padding-lg);
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}
.slblog-avatar-lg {
    border-radius: var(--radius-full);
    flex-shrink: 0;
}
.slblog-author-box-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}
.slblog-author-box-info h3 {
    font-size: var(--text-h4);
}
.slblog-author-box-info p {
    color: var(--color-text-subdued);
    font-size: var(--text-body-sm);
    line-height: var(--leading-relaxed);
}
.slblog-author-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-accent);
    font-size: var(--text-body-sm);
    font-weight: var(--weight-medium);
    text-decoration: none;
    margin-top: var(--space-2);
}
.slblog-author-link:hover {
    color: var(--color-accent-hover);
}

@media (max-width: 639px) {
    .slblog-author-box {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}


/* ═══════════════════════════════════════
   RELATED POSTS
   ═══════════════════════════════════════ */

.slblog-related {
    margin-top: var(--space-8);
}
.slblog-related h2 {
    font-size: var(--text-h3);
    margin-bottom: var(--space-6);
    text-align: center;
}
.slblog-related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap-lg);
}
@media (max-width: 768px) {
    .slblog-related-grid {
        grid-template-columns: 1fr;
    }
}


/* ═══════════════════════════════════════
   D. PROGRESS BAR (scroll indicator)
   ═══════════════════════════════════════ */

.slblog-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 9999;
    background: transparent;
    pointer-events: none;
}
.slblog-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
    width: 0%;
    transition: width 50ms linear;
    border-radius: 0 2px 2px 0;
}