/* ── Blog Shared Styles ── */

.blog-page-hero {
    padding: 7rem 0 4rem;
    text-align: center;
}

.blog-page-hero .eyebrow {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    color: var(--accent-primary);
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.blog-page-hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 1rem;
}

.blog-page-hero .lead {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
}

/* ── Post Grid ── */

.post-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
    padding: 0 0 5rem;
}

.post-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
    position: relative;
    overflow: hidden;
}

.post-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    opacity: 0;
    transition: opacity 0.25s;
}

.post-card:hover {
    border-color: var(--border-glow);
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.post-card:hover::before {
    opacity: 1;
}

.post-card.tag-claude::before   { background: linear-gradient(90deg, #f97316, #ec4899); }
.post-card.tag-openai::before   { background: linear-gradient(90deg, #10b981, #06b6d4); }
.post-card.tag-images::before   { background: linear-gradient(90deg, #a855f7, #818cf8); }
.post-card.tag-fundamentals::before { background: linear-gradient(90deg, #6366f1, #a855f7); }
.post-card.tag-tips::before      { background: linear-gradient(90deg, #f59e0b, #f97316); }
.post-card.tag-protocol::before  { background: linear-gradient(90deg, #06b6d4, #3b82f6); }
.post-card.tag-retrieval::before { background: linear-gradient(90deg, #8b5cf6, #06b6d4); }
.post-card.tag-workflow::before  { background: linear-gradient(90deg, #22c55e, #06b6d4); }
.post-card.tag-arch::before      { background: linear-gradient(90deg, #14b8a6, #6366f1); }

.post-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.25rem 0.65rem;
    border-radius: 99px;
    width: fit-content;
    font-weight: 600;
}

.post-tag.claude       { background: rgba(249,115,22,0.12); color: #f97316; }
.post-tag.openai       { background: rgba(16,185,129,0.12); color: #10b981; }
.post-tag.images       { background: rgba(168,85,247,0.12); color: #a855f7; }
.post-tag.fundamentals { background: rgba(99,102,241,0.12); color: #818cf8; }
.post-tag.tips         { background: rgba(245,158,11,0.12); color: #f59e0b; }
.post-tag.protocol     { background: rgba(6,182,212,0.12);  color: #06b6d4; }
.post-tag.retrieval    { background: rgba(139,92,246,0.12); color: #8b5cf6; }
.post-tag.workflow     { background: rgba(34,197,94,0.12);  color: #22c55e; }
.post-tag.arch         { background: rgba(20,184,166,0.12); color: #14b8a6; }

.post-card h2 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.35;
    color: var(--text-primary);
}

.post-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: auto;
}

.post-meta .dot { opacity: 0.4; }

.post-read-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-top: 0.25rem;
    transition: gap 0.2s;
}

.post-card:hover .post-read-link { gap: 0.65rem; }

/* ── Single Post Article ── */

.article-hero {
    padding: 7rem 0 3.5rem;
}

.article-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

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

.article-breadcrumb a:hover { color: var(--accent-primary); }

.article-hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 1.25rem;
    max-width: 720px;
}

.article-hero .article-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.article-hero .article-meta .tag {
    padding: 0.2rem 0.6rem;
    border-radius: 99px;
    font-size: 0.7rem;
}

/* ── Article Body ── */

.article-body {
    max-width: 720px;
    padding-bottom: 6rem;
}

.article-body h2 {
    font-family: var(--font-heading);
    font-size: 1.45rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin: 2.5rem 0 1rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-light);
}

.article-body h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 1.75rem 0 0.6rem;
}

.article-body p {
    font-size: 1rem;
    color: rgba(248,250,252,0.82);
    line-height: 1.75;
    margin-bottom: 1.1rem;
}

.article-body ul, .article-body ol {
    padding-left: 1.25rem;
    margin-bottom: 1.1rem;
}

.article-body li {
    font-size: 1rem;
    color: rgba(248,250,252,0.82);
    line-height: 1.7;
    margin-bottom: 0.4rem;
}

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

.article-body a {
    color: var(--accent-primary);
    text-decoration: none;
    border-bottom: 1px solid rgba(99,102,241,0.3);
    transition: border-color 0.2s;
}

.article-body a:hover { border-color: var(--accent-primary); }

/* Code block */
.code-block {
    background: #060810;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    padding: 1.25rem 1.5rem;
    margin: 1.25rem 0;
    overflow-x: auto;
    position: relative;
}

.code-block .code-label {
    position: absolute;
    top: 0.6rem;
    right: 0.85rem;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    text-transform: uppercase;
}

.code-block code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.65;
    color: #e2e8f0;
    white-space: pre;
    display: block;
}

.code-block code .token-key   { color: #818cf8; }
.code-block code .token-val   { color: #86efac; }
.code-block code .token-str   { color: #fde68a; }
.code-block code .token-comment{ color: #475569; font-style: italic; }
.code-block code .token-fn    { color: #f0abfc; }

/* Callout box */
.callout {
    border-left: 3px solid var(--accent-primary);
    background: rgba(99,102,241,0.07);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    font-size: 0.95rem;
    color: rgba(248,250,252,0.85);
    line-height: 1.65;
}

.callout.tip  { border-color: #10b981; background: rgba(16,185,129,0.07); }
.callout.warn { border-color: #f59e0b; background: rgba(245,158,11,0.07); }

.callout strong {
    display: block;
    margin-bottom: 0.3rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent-primary);
}

.callout.tip strong  { color: #10b981; }
.callout.warn strong { color: #f59e0b; }

/* Pull quote */
.pull-quote {
    border-top: 1px solid var(--border-medium);
    border-bottom: 1px solid var(--border-medium);
    padding: 1.5rem 0;
    margin: 2rem 0;
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    line-height: 1.45;
    text-align: center;
}

/* Stat strip */
.stat-strip {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin: 1.75rem 0;
    text-align: center;
}

.stat-strip .stat-val {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.stat-strip .stat-lbl {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-top: 0.2rem;
}

/* Post nav footer */
.article-footer {
    border-top: 1px solid var(--border-light);
    padding: 2.5rem 0 5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.article-footer a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.article-footer a:hover { color: var(--accent-primary); }

@media (max-width: 640px) {
    .post-grid { grid-template-columns: 1fr; }
    .article-hero h1 { font-size: 1.65rem; }
    .article-body h2 { font-size: 1.25rem; }
}