/* =========================================================
   BLOG  (/blog listing + /blog/:slug detail)

   Used to be two separate runtime-injected <style> tags (one from
   blog.js, one from blog-post.js) — same pattern category.js used
   to have, with the same downside: functions/blog/[slug].js
   edge-renders a post's HTML into #app directly, so that first
   paint (crawlers, slow connections) shipped completely unstyled
   until blog-post.js ran. Moved to a static file for the same
   reason category-page.css was: correct first paint + one place
   to edit instead of two copies that can drift apart.

   Listing and detail pages share a couple of class names
   (.blog-breadcrumb, .blog-card-cat) since they used to be
   style-isolated by only ever having one of the two injected at a
   time. Now that both live in the same file, the detail-page
   versions are scoped under .blog-post / .blog-post-header so they
   don't fight the listing-page rules for the same properties.

   Reads colors/radius/shadow from the :root tokens in main.css.
   ========================================================= */

/* ═══════════════════════════════════════
   LISTING  (/blog)
═══════════════════════════════════════ */

.blog-hero {
    max-width: 860px;
    margin: 40px auto 8px;
    padding: 0 20px;
    text-align: center;
}
.blog-hero h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--c-text);
    margin: 0 0 12px;
}
.blog-hero-desc {
    color: var(--c-text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
    margin: 0;
}

.blog-filter-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    max-width: 1100px;
    margin: 28px auto 0;
    padding: 0 20px;
}
.blog-filter {
    padding: 7px 16px;
    border: 1px solid var(--c-border);
    background: var(--c-surface);
    color: var(--c-text-secondary);
    border-radius: var(--r-full);
    font-size: .85rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color var(--tr-fast), color var(--tr-fast), background var(--tr-fast);
}
.blog-filter:hover {
    border-color: var(--c-info-border);
    color: var(--c-primary);
}
.blog-filter--active {
    background: var(--c-primary);
    border-color: var(--c-primary);
    color: #fff;
}

.blog-grid-section {
    max-width: 1100px;
    margin: 28px auto 56px;
    padding: 0 20px;
}
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}
.blog-card {
    display: flex;
    flex-direction: column;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--r-lg);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: box-shadow var(--tr-base), border-color var(--tr-base), transform var(--tr-base);
}
.blog-card:hover {
    box-shadow: var(--sh-md);
    border-color: var(--c-border-hover);
    transform: translateY(-2px);
}
.blog-card-img {
    width: 100%;
    height: 160px;
    background: var(--c-surface-subtle);
    overflow: hidden;
}
.blog-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.blog-card-img--placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--c-border-hover);
    background: var(--c-surface-subtle);
}
.blog-card-body {
    padding: 18px 20px 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}
.blog-card-cat {
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: var(--c-primary);
}
.blog-card-body h2 {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--c-text);
    line-height: 1.4;
}
.blog-card-body p {
    margin: 0;
    font-size: .85rem;
    color: var(--c-text-secondary);
    line-height: 1.55;
    flex: 1;
}
.blog-card-meta {
    font-size: .78rem;
    color: var(--c-text-tertiary);
    margin-top: 4px;
}

.blog-empty {
    text-align: center;
    color: var(--c-text-tertiary);
    padding: 40px 0;
    grid-column: 1 / -1;
}

.blog-breadcrumb {
    max-width: 1100px;
    margin: 0 auto 40px;
    padding: 0 20px;
    font-size: .85rem;
    color: var(--c-text-tertiary);
}
.blog-breadcrumb a {
    color: var(--c-primary);
    text-decoration: none;
}
.blog-breadcrumb a:hover { text-decoration: underline; }

/* ═══════════════════════════════════════
   DETAIL  (/blog/:slug)
   Overrides scoped under .blog-post / .blog-post-header so they
   don't collide with the listing-page rules above.
═══════════════════════════════════════ */

.blog-post {
    max-width: 720px;
    margin: 0 auto 64px;
    padding: 0 20px;
}

.blog-post .blog-breadcrumb {
    max-width: none;
    margin: 32px 0 24px;
    padding: 0;
}

.blog-post-header { margin-bottom: 24px; }
.blog-post-header .blog-card-cat {
    display: inline-block;
    margin-bottom: 10px;
}
.blog-post-header h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--c-text);
    line-height: 1.25;
    margin: 0 0 12px;
}
.blog-post-meta {
    display: flex;
    gap: 6px;
    align-items: center;
    font-size: .85rem;
    color: var(--c-text-tertiary);
}

.blog-post-cover {
    width: 100%;
    height: auto;
    border-radius: var(--r-lg);
    margin-bottom: 32px;
    display: block;
}

/* ── PROSE ── */
.blog-post-content {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--c-text);
}
.blog-post-content h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--c-text);
    margin: 2rem 0 .75rem;
}
.blog-post-content h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--c-text);
    margin: 1.75rem 0 .6rem;
}
.blog-post-content p { margin: 0 0 1.1rem; }
.blog-post-content ul,
.blog-post-content ol { margin: 0 0 1.1rem; padding-left: 1.4rem; }
.blog-post-content li { margin-bottom: .4rem; }
.blog-post-content a {
    color: var(--c-primary);
    text-decoration: underline;
}
.blog-post-content code {
    background: var(--c-surface-subtle);
    color: #db2777;
    padding: 2px 6px;
    border-radius: 5px;
    font-size: .88em;
}
.blog-post-content pre {
    background: var(--c-text);
    color: #e2e8f0;
    padding: 16px 18px;
    border-radius: var(--r-md);
    overflow-x: auto;
    margin: 0 0 1.1rem;
}
.blog-post-content pre code { background: none; color: inherit; padding: 0; }
.blog-post-content blockquote {
    border-left: 3px solid var(--c-primary);
    margin: 0 0 1.1rem;
    padding: 4px 0 4px 16px;
    color: var(--c-text-secondary);
    font-style: italic;
}
.blog-post-content img {
    max-width: 100%;
    border-radius: var(--r-md);
}

/* ── RELATED TOOL CTA ── */
.blog-tool-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin: 36px 0;
    padding: 20px 24px;
    background: var(--c-primary-light);
    border: 1.5px solid var(--c-info-border);
    border-radius: var(--r-lg);
    text-decoration: none;
    color: inherit;
    transition: border-color var(--tr-fast), box-shadow var(--tr-fast);
}
.blog-tool-cta:hover {
    border-color: var(--c-primary);
    box-shadow: var(--sh-sm);
}
.blog-tool-cta-text { display: flex; flex-direction: column; gap: 2px; }
.blog-tool-cta-eyebrow {
    font-size: .72rem;
    font-weight: 700;
    color: var(--c-primary);
    text-transform: uppercase;
    letter-spacing: .04em;
}
.blog-tool-cta-title { font-size: 1rem; font-weight: 700; color: var(--c-text); }
.blog-tool-cta-desc { font-size: .85rem; color: var(--c-text-secondary); }
.blog-tool-cta-arrow { flex-shrink: 0; font-size: 1.4rem; color: var(--c-primary); }

.blog-post-footer {
    margin-top: 40px;
    border-top: 1px solid var(--c-border);
    padding-top: 20px;
}
.blog-post-back {
    color: var(--c-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: .9rem;
}
.blog-post-back:hover { text-decoration: underline; }