/* ============================================================
   BLOG — plum & gold editorial (extends portfolio.css tokens)
   Covers: blog index, post layout, archive pages.
   ============================================================ */

/* Secondary button used by blog templates (maps to portfolio's ghost) */
.btn-secondary {
    background: transparent;
    color: var(--gold-soft);
    border: 1px solid var(--line);
}
.btn-secondary:hover { border-color: var(--gold); background: var(--panel); transform: translateY(-2px); }

/* ===== Blog hero ===== */
.blog-hero {
    padding: 7.5rem 0 1.5rem;
    text-align: center;
}
.blog-hero-content { max-width: 760px; margin: 0 auto; }
.blog-hero-title {
    font-family: var(--serif);
    font-size: clamp(2.4rem, 6vw, 4rem);
    font-weight: 500;
    line-height: 1.08;
    color: var(--ink);
}
.blog-hero-title .gradient-text { font-style: italic; color: var(--gold-soft); }
.blog-hero-subtitle {
    margin-top: var(--space-md);
    color: var(--muted);
    font-size: 1.1rem;
}
.blog-hero-stats {
    display: flex;
    gap: var(--space-2xl);
    justify-content: center;
    margin-top: var(--space-lg);
}
.blog-stat { display: flex; flex-direction: column; gap: 0.25rem; }
.blog-stat-number { font-family: var(--serif); font-size: 2.2rem; font-weight: 600; color: var(--gold); font-variant-numeric: lining-nums; }
.blog-stat-label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--muted); }

.blog-content { padding: var(--space-lg) 0 var(--space-3xl); }

/* ===== Featured post ===== */
.featured-post {
    position: relative;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: var(--space-xl);
    margin-bottom: var(--space-3xl);
    overflow: hidden;
    transition: transform 0.35s var(--ease), border-color 0.35s var(--ease);
}
.featured-post::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, var(--gold), var(--rose-deep));
}
.featured-post:hover { transform: translateY(-4px); border-color: var(--gold); }
.featured-post-badge {
    position: absolute; top: var(--space-lg); right: var(--space-lg);
    display: inline-flex; align-items: center; gap: 0.4rem;
    background: rgba(214,176,106,0.12); border: 1px solid var(--line);
    color: var(--gold-soft);
    padding: 0.35rem 0.85rem; border-radius: 999px;
    font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.14em; font-weight: 600;
}
.featured-post-meta {
    display: flex; gap: var(--space-lg); flex-wrap: wrap;
    font-size: 0.8rem; color: var(--muted); margin-bottom: var(--space-md);
}
.featured-post-title {
    font-family: var(--serif); font-weight: 600;
    font-size: clamp(1.7rem, 3vw, 2.4rem); line-height: 1.2; margin-bottom: var(--space-md);
}
.featured-post-title a { color: var(--ink); text-decoration: none; transition: color 0.25s var(--ease); }
.featured-post-title a:hover { color: var(--gold-soft); }
.featured-post-description { color: var(--soft); font-size: 1.08rem; line-height: 1.75; margin-bottom: var(--space-lg); max-width: 60ch; }
.featured-post-footer { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-md); }
.featured-post-tags { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* ===== Section header + filters ===== */
.blog-posts-section { margin-top: var(--space-2xl); }
.section-header {
    display: flex; justify-content: space-between; align-items: baseline;
    flex-wrap: wrap; gap: var(--space-md); margin-bottom: var(--space-xl);
    border-bottom: 1px solid var(--line-soft); padding-bottom: var(--space-md);
}
.section-header .section-title { font-size: clamp(1.6rem, 3vw, 2.2rem); text-align: left; margin: 0; }
.blog-filters { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.filter-btn {
    padding: 0.4rem 1rem;
    background: transparent;
    border: 1px solid var(--line-soft);
    border-radius: 999px;
    color: var(--muted);
    font-family: var(--sans); font-size: 0.72rem; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.1em;
    cursor: pointer; transition: all 0.25s var(--ease);
}
.filter-btn:hover { border-color: var(--gold); color: var(--gold-soft); }
.filter-btn.active { background: var(--gold); border-color: var(--gold); color: #1a1014; }

/* ===== Post cards (index + archive) ===== */
.blog-posts-grid,
.blog-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-md);
}
.blog-card {
    position: relative;
    background: var(--panel);
    border: 1px solid var(--line-soft);
    border-radius: 6px;
    padding: var(--space-lg);
    display: flex; flex-direction: column;
    overflow: hidden;
    transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), background 0.35s var(--ease);
}
.blog-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, var(--gold), var(--rose-deep));
    transform: scaleX(0); transform-origin: left; transition: transform 0.4s var(--ease);
}
.blog-card:hover { transform: translateY(-4px); border-color: var(--line); background: var(--panel-hi); }
.blog-card:hover::before { transform: scaleX(1); }
.blog-card-header {
    display: flex; justify-content: space-between; gap: var(--space-md);
    font-size: 0.72rem; color: var(--muted); margin-bottom: var(--space-sm);
    text-transform: uppercase; letter-spacing: 0.08em;
}
.blog-card-category { color: var(--rose); font-weight: 600; }
.blog-card h3, .blog-card-title {
    font-family: var(--serif); font-size: 1.4rem; font-weight: 600;
    line-height: 1.3; margin-bottom: 0.6rem;
}
.blog-card h3 a, .blog-card-title a { color: var(--ink); text-decoration: none; transition: color 0.25s var(--ease); }
.blog-card h3 a:hover, .blog-card-title a:hover { color: var(--gold-soft); }
.blog-card p, .blog-card-excerpt { color: var(--soft); font-size: 0.96rem; line-height: 1.7; margin-bottom: var(--space-md); flex: 1; }
.blog-card-tags { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-bottom: var(--space-md); }
.blog-card-meta { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.5rem; margin-bottom: var(--space-md); }
.blog-card-meta .read-time, .blog-card-read-time { font-size: 0.72rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.blog-card-link {
    align-self: flex-start; margin-top: auto;
    font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.14em;
    color: var(--gold); text-decoration: none;
    display: inline-flex; align-items: center; gap: 0.5rem; transition: gap 0.3s var(--ease);
}
.blog-card-link:hover { gap: 0.9rem; }

/* Tags (shared) */
.tag, .tag-small {
    font-size: 0.66rem; letter-spacing: 0.06em; text-transform: uppercase;
    color: var(--gold-soft);
    border: 1px solid var(--line-soft);
    border-radius: 999px; padding: 0.28rem 0.7rem;
    background: rgba(214,176,106,0.05);
}

/* No posts */
.no-posts { text-align: center; padding: var(--space-3xl); color: var(--muted); }
.no-posts i { font-size: 2.5rem; color: var(--gold); margin-bottom: var(--space-md); }

/* Newsletter / follow */
.blog-newsletter {
    text-align: center;
    border: 1px solid var(--line-soft);
    border-radius: 8px;
    background: var(--panel);
    padding: var(--space-2xl) var(--space-lg);
    margin-top: var(--space-3xl);
}
.newsletter-content h2 { font-family: var(--serif); font-size: 2rem; color: var(--ink); margin-bottom: var(--space-sm); }
.newsletter-content p { color: var(--muted); margin-bottom: var(--space-lg); }
.newsletter-form { display: flex; gap: var(--space-sm); justify-content: center; flex-wrap: wrap; }

/* ============================================================
   POST LAYOUT
   ============================================================ */
.blog-post-container { padding: 9rem 0 var(--space-3xl); }
.blog-post {
    max-width: 820px; margin: 0 auto;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: clamp(1.5rem, 4vw, 3.5rem);
}

/* Post header */
.post-header { margin-bottom: var(--space-2xl); }
.back-to-blog, .back-link {
    display: inline-flex; align-items: center; gap: 0.5rem;
    color: var(--gold); text-decoration: none; font-size: 0.75rem;
    text-transform: uppercase; letter-spacing: 0.14em; font-weight: 600;
    margin-bottom: var(--space-lg); transition: gap 0.3s var(--ease);
}
.back-to-blog:hover, .back-link:hover { gap: 0.9rem; }
.post-meta-top { display: flex; gap: var(--space-lg); flex-wrap: wrap; font-size: 0.78rem; color: var(--muted); margin-bottom: var(--space-md); text-transform: uppercase; letter-spacing: 0.08em; }
.post-title {
    font-family: var(--serif); font-weight: 600;
    font-size: clamp(2rem, 5vw, 3rem); line-height: 1.15; color: var(--ink);
    margin-bottom: var(--space-md);
}
.post-description { font-size: 1.2rem; color: var(--soft); line-height: 1.7; margin-bottom: var(--space-lg); font-style: italic; }
.post-meta {
    display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-md);
    padding: var(--space-md); border: 1px solid var(--line-soft); border-radius: 8px; background: rgba(255,238,228,0.02);
}
.post-author { display: flex; align-items: center; gap: var(--space-sm); }
.author-avatar { width: 48px; height: 48px; border-radius: 50%; border: 1px solid var(--gold); }
.author-info { display: flex; flex-direction: column; gap: 0.15rem; }
.author-name { font-weight: 600; color: var(--ink); font-size: 0.95rem; }
.author-title { font-size: 0.8rem; color: var(--muted); }
.post-tags { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* Post content typography */
.post-content { font-size: 1.08rem; line-height: 1.85; color: var(--soft); max-width: 68ch; margin: var(--space-xl) auto 0; }
.post-content > *:first-child { margin-top: 0; }
.post-content h2 {
    font-family: var(--serif); font-size: 1.9rem; font-weight: 600; color: var(--ink);
    margin: 2.6rem 0 1rem; padding-bottom: 0.4rem; border-bottom: 1px solid var(--line);
}
.post-content h3 { font-family: var(--serif); font-size: 1.5rem; font-weight: 600; color: var(--gold-soft); margin: 2.2rem 0 0.8rem; }
.post-content h4 { font-size: 1.15rem; font-weight: 700; color: var(--ink); margin: 1.8rem 0 0.6rem; letter-spacing: 0.01em; }
.post-content p { margin-bottom: 1.35rem; }
.post-content a { color: var(--gold); text-decoration: none; border-bottom: 1px solid var(--line); transition: color 0.25s var(--ease), border-color 0.25s var(--ease); }
.post-content a:hover { color: var(--gold-soft); border-color: var(--gold); }
.post-content strong { color: var(--ink); font-weight: 700; }
.post-content em { color: var(--soft); }
.post-content ul, .post-content ol { margin: 0 0 1.35rem 0; padding-left: 1.6rem; }
.post-content ul { list-style: none; padding-left: 1.4rem; }
.post-content ul li { position: relative; margin-bottom: 0.6rem; padding-left: 1.2rem; }
.post-content ul li::before { content: '◆'; position: absolute; left: 0; color: var(--rose-deep); font-size: 0.6rem; top: 0.55rem; }
.post-content ol li { margin-bottom: 0.6rem; padding-left: 0.4rem; }
.post-content ol li::marker { color: var(--gold); font-weight: 700; }
.post-content blockquote {
    margin: 1.6rem 0; padding: 1rem 1.4rem;
    border-left: 2px solid var(--gold);
    background: rgba(214,176,106,0.05); border-radius: 0 6px 6px 0;
    color: var(--soft); font-style: italic;
}
.post-content img { border-radius: 8px; margin: 1.6rem 0; border: 1px solid var(--line-soft); }
.post-content hr { border: none; height: 1px; background: var(--line); margin: 2.4rem 0; }

/* Tables */
.post-content table { width: 100%; border-collapse: collapse; margin: 1.6rem 0; font-size: 0.92rem; }
.post-content th, .post-content td { padding: 0.6rem 0.8rem; border: 1px solid var(--line-soft); text-align: left; }
.post-content th { background: rgba(214,176,106,0.08); color: var(--gold-soft); text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.78rem; }

/* Inline code */
.post-content code {
    font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    font-size: 0.88em; color: var(--gold-soft);
    background: rgba(214,176,106,0.10); border: 1px solid var(--line-soft);
    border-radius: 5px; padding: 0.12rem 0.45rem;
}

/* Code blocks */
.post-content pre {
    position: relative;
    background: var(--bg3);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 2.6rem 1.3rem 1.3rem;
    margin: 1.8rem 0;
    overflow-x: auto;
}
.post-content pre::before {
    content: attr(data-lang);
    position: absolute; top: 0.6rem; left: 1.1rem;
    font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase;
    color: var(--gold); font-weight: 700;
}
.post-content pre code { background: none; border: none; padding: 0; color: #e8dccb; font-size: 0.9rem; line-height: 1.7; display: block; white-space: pre; }
.code-block-wrapper { position: relative; }
.copy-code-btn {
    position: absolute; top: 0.55rem; right: 0.9rem; z-index: 3;
    background: rgba(214,176,106,0.10); border: 1px solid var(--line);
    color: var(--gold); padding: 0.3rem 0.7rem; border-radius: 6px;
    font-size: 0.68rem; font-weight: 600; letter-spacing: 0.06em; cursor: pointer;
    display: inline-flex; align-items: center; gap: 0.35rem; transition: all 0.25s var(--ease);
}
.copy-code-btn:hover { border-color: var(--gold); background: rgba(214,176,106,0.18); }
.copy-code-btn.copied { color: var(--rose); border-color: var(--rose); }
.post-content pre.diagram-block { background: var(--bg2); }
.post-content pre.diagram-block code { font-family: 'JetBrains Mono', monospace; }

/* Post footer: share + author bio */
.post-footer { margin-top: var(--space-2xl); padding-top: var(--space-xl); border-top: 1px solid var(--line-soft); }
.post-share h3 { font-family: var(--sans); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--gold); margin-bottom: var(--space-md); }
.share-buttons { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-bottom: var(--space-xl); }
.share-btn {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.55rem 1.1rem; border-radius: 4px;
    border: 1px solid var(--line); color: var(--soft); background: transparent;
    text-decoration: none; font-size: 0.78rem; font-weight: 600; cursor: pointer;
    transition: all 0.25s var(--ease);
}
.share-btn:hover { border-color: var(--gold); color: var(--gold-soft); transform: translateY(-2px); }

.author-bio {
    display: flex; gap: var(--space-md); align-items: flex-start;
    padding: var(--space-lg); border: 1px solid var(--line-soft); border-radius: 8px;
    background: rgba(255,238,228,0.02);
}
.author-bio-avatar { width: 68px; height: 68px; border-radius: 50%; border: 1px solid var(--gold); flex-shrink: 0; }
.author-bio-content h3 { font-family: var(--sans); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--gold); margin-bottom: 0.4rem; }
.author-bio-content h4 { font-family: var(--serif); font-size: 1.3rem; color: var(--ink); margin-bottom: 0.4rem; }
.author-bio-content p { color: var(--soft); font-size: 0.92rem; line-height: 1.7; margin-bottom: 0.8rem; }
.author-social { display: flex; gap: 0.9rem; }
.author-social a { color: var(--muted); font-size: 1.1rem; transition: color 0.25s var(--ease); }
.author-social a:hover { color: var(--gold); }

/* Related posts */
.related-posts { max-width: 820px; margin: var(--space-2xl) auto 0; }
.related-posts h2 { font-family: var(--serif); font-size: 1.6rem; color: var(--ink); margin-bottom: var(--space-lg); }
.related-posts-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: var(--space-md); }
.related-post-card {
    display: block; padding: var(--space-md);
    border: 1px solid var(--line-soft); border-radius: 6px; background: var(--panel);
    text-decoration: none; color: var(--soft); transition: all 0.3s var(--ease);
}
.related-post-card:hover { border-color: var(--gold); transform: translateY(-3px); }
.related-post-card time { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); }
.related-post-card h3, .related-post-card h4 { font-family: var(--serif); font-size: 1.1rem; color: var(--ink); margin: 0.4rem 0; }
.related-post-card .read-more { font-size: 0.72rem; color: var(--gold); text-transform: uppercase; letter-spacing: 0.1em; }

/* ============================================================
   ARCHIVE
   ============================================================ */
.blog-archive-container { padding: 9rem 0 var(--space-3xl); }
.archive-header { text-align: center; margin-bottom: var(--space-2xl); }
.archive-title { font-family: var(--serif); font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 600; color: var(--ink); margin: var(--space-md) 0; }
.archive-title i { color: var(--gold); margin-right: 0.5rem; font-size: 0.8em; }
.archive-description { color: var(--muted); }
.archive-navigation { margin-top: var(--space-2xl); padding-top: var(--space-xl); border-top: 1px solid var(--line-soft); text-align: center; }
.archive-navigation h3 { font-family: var(--serif); font-size: 1.4rem; color: var(--ink); margin-bottom: var(--space-md); }
.archive-links { display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: center; }
.archive-link {
    padding: 0.4rem 0.9rem; border-radius: 999px;
    border: 1px solid var(--line-soft); background: transparent; color: var(--muted);
    text-decoration: none; font-size: 0.8rem; transition: all 0.25s var(--ease);
}
.archive-link:hover, .archive-link.active { border-color: var(--gold); color: var(--gold-soft); }
.archive-link.active { background: rgba(214,176,106,0.1); font-weight: 600; }

@media (max-width: 720px) {
    .blog-hero-stats { gap: var(--space-lg); }
    .share-buttons { flex-direction: column; }
    .share-btn { justify-content: center; }
    .author-bio { flex-direction: column; align-items: center; text-align: center; }
    .post-content { font-size: 1rem; }
    .post-content pre { margin-left: -0.6rem; margin-right: -0.6rem; }
}