/* ============================================================
   blog.css — modern blog redesign (listing + article)
   Loaded after pages.css. Uses design tokens from tokens.css.
   ============================================================ */

/* ---------- Hero ---------- */
.blog-hero {
    padding: clamp(2.5rem, 5vw, 4rem) 0;
}

/* Keep content above the hero's decorative ::before overlay */
.blog-hero .container {
    position: relative;
    z-index: 1;
}

/* Hero CTA: guarantee readable white-on-blue label */
.blog-hero .btn-primary,
.blog-hero .btn-primary:hover,
.blog-hero .btn-primary:focus {
    color: #fff;
}

.blog-hero h1 {
    font-weight: 800;
    letter-spacing: -0.02em;
}

/* ---------- Category chip bar ---------- */
.blog-cat-chips {
    display: flex;
    gap: .5rem;
    flex-wrap: wrap;
    margin-bottom: 1.75rem;
}

.blog-chip {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .42rem .95rem;
    border-radius: 999px;
    border: 1px solid var(--border-light);
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: var(--fs-sm);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.blog-chip:hover {
    border-color: var(--clr-primary);
    color: var(--clr-primary);
}

.blog-chip.active {
    background: var(--clr-primary);
    border-color: var(--clr-primary);
    color: #fff;
}

.blog-chip .chip-count {
    font-size: var(--fs-xs);
    opacity: .75;
    font-weight: 700;
}

/* ---------- Post cards ---------- */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
    gap: 1.4rem;
}

.blog-card-v2 {
    display: flex;
    flex-direction: column;
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: 14px;
    overflow: hidden;
    text-decoration: none;
    transition: box-shadow var(--transition-fast), transform var(--transition-fast),
                border-color var(--transition-fast);
}

.blog-card-v2:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--c-blue-200);
}

/* Featured (first) post spans the full row */
.blog-card-v2.featured {
    grid-column: 1 / -1;
}

.card-thumb {
    position: relative;
    aspect-ratio: 16 / 9;
    width: 100%;
    overflow: hidden;
    background: linear-gradient(135deg, var(--c-blue-50), var(--c-blue-200));
    display: flex;
    align-items: center;
    justify-content: center;
}

.featured .card-thumb {
    aspect-ratio: 21 / 9;
}

.card-thumb img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .45s ease;
}

.blog-card-v2:hover .card-thumb img {
    transform: scale(1.05);
}

.card-thumb .thumb-initial {
    font-size: clamp(2.2rem, 5vw, 3.4rem);
    font-weight: 800;
    color: var(--clr-primary);
    opacity: .55;
    user-select: none;
}

.card-thumb-wrap .thumb-cat {
    position: absolute;
    top: .8rem;
    inset-inline-start: .8rem;
    z-index: 1;
}

.card-thumb-wrap {
    position: relative;
}

.blog-card-body {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    padding: 1.15rem 1.25rem 1.25rem;
}

.blog-card-v2.featured .blog-card-body {
    padding: clamp(1.15rem, 3vw, 1.75rem);
}

.blog-card-title {
    font-size: var(--fs-lg);
    font-weight: 700;
    line-height: 1.35;
    margin: 0 0 .55rem;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.featured .blog-card-title {
    font-size: var(--fs-xl);
}

.blog-card-v2:hover .blog-card-title {
    color: var(--clr-primary);
}

.blog-card-excerpt {
    font-size: var(--fs-sm);
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0 0 1rem;
    flex-grow: 1;
    /* Clamp to 3 lines (2 on featured keeps more text) */
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.featured .blog-card-excerpt {
    -webkit-line-clamp: 2;
    font-size: var(--fs-md);
}

.blog-card-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: .35rem .55rem;
    font-size: var(--fs-xs);
    color: var(--text-muted);
}

.blog-card-meta .dot::before {
    content: '·';
    font-weight: 700;
}

.read-more-link {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--clr-primary);
    margin-top: .85rem;
}

.read-more-link .fe {
    transition: transform var(--transition-fast);
}

.blog-card-v2:hover .read-more-link .fe {
    transform: translateX(4px);
}

/* ---------- Sidebar ---------- */
.blog-sidebar-sticky {
    position: sticky;
    top: 90px;
}

@media (max-width: 991.98px) {
    .blog-sidebar-sticky {
        position: static;
    }
}

/* ---------- Pagination ---------- */
.blog-pagination {
    display: flex;
    justify-content: center;
    gap: .4rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.blog-pagination a,
.blog-pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 42px;
    height: 42px;
    padding: 0 .75rem;
    border-radius: 10px;
    border: 1px solid var(--border-light);
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: var(--fs-sm);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.blog-pagination a:hover {
    border-color: var(--clr-primary);
    color: var(--clr-primary);
}

.blog-pagination .current {
    background: var(--clr-primary);
    border-color: var(--clr-primary);
    color: #fff;
}

.blog-pagination .ellipsis {
    border: none;
    background: transparent;
    min-width: auto;
    padding: 0 .2rem;
}

/* ---------- Empty state ---------- */
.blog-empty {
    text-align: center;
    padding: 3.5rem 1rem;
    border: 1px dashed var(--border-light);
    border-radius: 14px;
    background: var(--bg-page);
}

.blog-empty i {
    font-size: 2.4rem;
    color: var(--text-muted);
}

/* ---------- Article page ---------- */
.article-header-block {
    margin-bottom: 1.5rem;
}

.article-header-block h1 {
    font-size: clamp(1.55rem, 3.4vw, 2.2rem);
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -0.015em;
    color: var(--text-primary);
    margin-bottom: .9rem;
}

.article-meta-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .4rem 1rem;
}

/* Comfortable reading measure inside the 8-col layout */
.article-content {
    max-width: 72ch;
    font-size: 1.05rem;
    line-height: 1.8;
}

.article-content h2 {
    font-size: var(--fs-xl);
    font-weight: 800;
    margin-top: 2.2rem;
    margin-bottom: .7rem;
    padding-bottom: .35rem;
    border-bottom: 2px solid var(--c-blue-50);
    scroll-margin-top: 90px;
}

.article-content h3 {
    font-size: var(--fs-lg);
    font-weight: 700;
    margin-top: 1.7rem;
    margin-bottom: .5rem;
    scroll-margin-top: 90px;
}

.article-content img {
    border-radius: 10px;
    height: auto;
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.3rem 0;
    font-size: var(--fs-sm);
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.article-content th,
.article-content td {
    border: 1px solid var(--border-light);
    padding: .55rem .8rem;
    text-align: start;
    vertical-align: top;
}

.article-content th {
    background: var(--c-blue-50);
    font-weight: 700;
}

/* Lead paragraph under the title */
.article-lead {
    font-size: 1.12rem;
    line-height: 1.65;
    color: var(--text-secondary);
    border-inline-start: 3px solid var(--clr-primary);
    padding-inline-start: 1rem;
    margin-bottom: 1.75rem;
}

/* Table of contents (sidebar) */
.toc-widget .toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    counter-reset: toc;
}

.toc-widget .toc-list a {
    display: block;
    padding: .4rem 0;
    font-size: var(--fs-sm);
    color: var(--text-secondary);
    text-decoration: none;
    line-height: 1.45;
    border-bottom: 1px dashed var(--border-light);
    transition: color var(--transition-fast), padding-inline-start var(--transition-fast);
}

.toc-widget .toc-list a::before {
    counter-increment: toc;
    content: counter(toc) '. ';
    color: var(--clr-primary);
    font-weight: 700;
}

.toc-widget .toc-list a:hover {
    color: var(--clr-primary);
    padding-inline-start: .3rem;
}

.toc-widget .toc-list li:last-child a {
    border-bottom: none;
}

/* Reading progress bar */
#readingProgress {
    position: fixed;
    top: 0;
    inset-inline-start: 0;
    height: 3px;
    width: 0%;
    background: linear-gradient(90deg, var(--clr-primary), var(--accent-teal, var(--clr-primary)));
    z-index: 1080;
    transition: width .1s linear;
    pointer-events: none;
}

/* Author box */
.author-box {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    background: var(--bg-page);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 1.1rem 1.25rem;
}

.author-avatar {
    width: 52px;
    height: 52px;
    min-width: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-header, var(--clr-primary)));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
}

/* Related cards */
.related-card-v2 {
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
                transform var(--transition-fast);
}

.related-card-v2:hover {
    transform: translateY(-3px);
    border-color: var(--c-blue-200);
    box-shadow: var(--shadow-md);
}

.related-card-v2 a.rel-title {
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.related-card-v2:hover a.rel-title {
    color: var(--clr-primary);
}

/* ---------- Accessibility: reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    .blog-card-v2,
    .blog-card-v2:hover,
    .card-thumb img,
    .blog-card-v2:hover .card-thumb img,
    .related-card-v2,
    .related-card-v2:hover,
    .read-more-link .fe,
    #readingProgress {
        transition: none;
        transform: none;
    }
}