/*
  Blog-specific styles. Reuses the same color/spacing/radius values already
  used across the site (see contact.html, rephrase.css, main.css) rather
  than inventing a new visual language — collected here as local custom
  properties purely for internal maintainability of this one file, not a
  parallel design-token system.
*/
:root {
  --blog-color-text: #1e293b;
  --blog-color-text-muted: #64748b;
  --blog-color-border: #e2e8f0;
  --blog-color-surface: #ffffff;
  --blog-color-surface-muted: #f8fafc;
  --blog-color-primary: #2563eb;
  --blog-color-primary-dark: #1d4ed8;
  --blog-radius: 12px;
  --blog-radius-sm: 8px;
  --blog-content-width: 740px;
  --blog-page-width: 1120px;
}

.blog-container {
  max-width: var(--blog-page-width);
  margin: 0 auto;
  padding: 0 24px;
}

.blog-visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Hero ─────────────────────────────────────────────────────────────── */
.blog-hero {
  padding: 56px 0 32px;
  border-bottom: 1px solid var(--blog-color-border);
}
.blog-hero-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--blog-color-text);
  margin: 0 0 10px;
}
.blog-hero-description {
  font-size: 1.05rem;
  color: var(--blog-color-text-muted);
  max-width: 640px;
  margin: 0 0 24px;
}
@media (max-width: 480px) {
  .blog-hero-title { font-size: 1.6rem; }
}

/* ── Category nav ─────────────────────────────────────────────────────── */
.blog-category-nav-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
}
@media (max-width: 480px) {
  .blog-category-nav-list {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
  }
}
.blog-category-pill {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--blog-color-border);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--blog-color-text);
  text-decoration: none;
  white-space: nowrap;
  transition: background .15s, border-color .15s;
}
.blog-category-pill:hover { background: var(--blog-color-surface-muted); }
.blog-category-pill--current {
  background: var(--blog-color-primary);
  border-color: var(--blog-color-primary);
  color: #fff;
}
.blog-category-pill:focus-visible,
.blog-article-card-link:focus-visible,
.blog-tool-card:focus-visible,
.blog-toc a:focus-visible,
.blog-breadcrumbs a:focus-visible {
  outline: 2px solid var(--blog-color-primary);
  outline-offset: 2px;
}

/* ── Sections ─────────────────────────────────────────────────────────── */
.blog-section-heading {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--blog-color-text);
  margin: 40px 0 20px;
}
.blog-featured-section,
.blog-latest-section,
.blog-tools-section {
  padding-top: 8px;
  padding-bottom: 8px;
}

/* ── Article grid / cards ─────────────────────────────────────────────── */
.blog-article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.blog-article-grid--compact { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 1024px) {
  .blog-article-grid, .blog-article-grid--compact { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .blog-article-grid, .blog-article-grid--compact { grid-template-columns: 1fr; }
}

.blog-article-card { list-style: none; }
.blog-article-card-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--blog-color-border);
  border-radius: var(--blog-radius);
  overflow: hidden;
  background: var(--blog-color-surface);
  transition: box-shadow .15s, transform .15s;
}
.blog-article-card-link:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,.08);
  transform: translateY(-2px);
}
.blog-article-card-image-wrap {
  display: block;
  aspect-ratio: 16 / 9;
  background: var(--blog-color-surface-muted);
  overflow: hidden;
}
.blog-article-card-image {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: top;
  display: block;
}
.blog-article-card-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 18px 20px;
  flex: 1;
}
.blog-article-card-category {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .03em;
  color: var(--blog-color-primary);
}
.blog-article-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--blog-color-text);
  line-height: 1.35;
}
.blog-article-card--featured .blog-article-card-title { font-size: 1.4rem; }
.blog-article-card-excerpt {
  font-size: 0.92rem;
  color: var(--blog-color-text-muted);
  line-height: 1.5;
}
.blog-article-card-meta {
  display: flex;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--blog-color-text-muted);
  margin-top: auto;
  padding-top: 8px;
}

/* ── Tools grid (homepage) ───────────────────────────────────────────── */
.blog-tools-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
@media (max-width: 768px) { .blog-tools-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .blog-tools-grid { grid-template-columns: 1fr; } }
.blog-tool-card {
  display: block;
  padding: 16px;
  border: 1px solid var(--blog-color-border);
  border-radius: var(--blog-radius-sm);
  text-align: center;
  font-weight: 600;
  color: var(--blog-color-text);
  text-decoration: none;
  background: var(--blog-color-surface);
  transition: border-color .15s, background .15s;
}
.blog-tool-card:hover { border-color: var(--blog-color-primary); background: var(--blog-color-surface-muted); }

/* ── Breadcrumbs ──────────────────────────────────────────────────────── */
.blog-breadcrumbs { margin: 24px 0 16px; }
.blog-breadcrumbs-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  font-size: 0.85rem;
  color: var(--blog-color-text-muted);
}
.blog-breadcrumbs-item { display: flex; align-items: center; gap: 6px; }
.blog-breadcrumbs a { color: var(--blog-color-text-muted); text-decoration: underline; }
.blog-breadcrumbs a:hover { color: var(--blog-color-primary); }
.blog-breadcrumbs-item [aria-current="page"] { color: var(--blog-color-text); font-weight: 600; }

/* ── Article page ─────────────────────────────────────────────────────── */
.blog-article-header { padding-top: 8px; }
.blog-preview-banner {
  display: inline-block;
  padding: 6px 12px;
  border-radius: var(--blog-radius-sm);
  background: #fef3c7;
  color: #92400e;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 12px;
}
.blog-article-category {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .03em;
  color: var(--blog-color-primary);
  text-decoration: none;
  margin-bottom: 10px;
}
.blog-article-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--blog-color-text);
  line-height: 1.2;
  margin: 0 0 14px;
  max-width: var(--blog-content-width);
}
@media (max-width: 480px) { .blog-article-title { font-size: 1.5rem; } }
.blog-article-summary {
  font-size: 1.1rem;
  color: var(--blog-color-text-muted);
  max-width: var(--blog-content-width);
  margin: 0 0 18px;
}
.blog-article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.88rem;
  color: var(--blog-color-text-muted);
  padding-bottom: 24px;
  border-bottom: 1px solid var(--blog-color-border);
  margin-bottom: 28px;
}
.blog-article-meta-author { font-weight: 700; color: var(--blog-color-text); }

.blog-article-featured-image-wrap {
  max-width: var(--blog-page-width);
  margin: 0 auto 32px;
  padding: 0 24px;
}
.blog-article-featured-image {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: top;
  border-radius: var(--blog-radius);
  display: block;
}

.blog-article-body-wrap {
  max-width: var(--blog-content-width);
}
.blog-article-body {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--blog-color-text);
}
.blog-article-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 40px 0 16px;
  line-height: 1.3;
}
.blog-article-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 32px 0 12px;
}
.blog-article-body p { margin: 0 0 20px; }
.blog-article-body ul, .blog-article-body ol { margin: 0 0 20px; padding-left: 1.4em; }
.blog-article-body li { margin-bottom: 8px; }
.blog-article-body img { max-width: 100%; height: auto; border-radius: var(--blog-radius-sm); }
.blog-article-body a { color: var(--blog-color-primary); }
.blog-article-body code {
  background: var(--blog-color-surface-muted);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}
.blog-article-body pre {
  background: #0f172a;
  color: #e2e8f0;
  padding: 16px;
  border-radius: var(--blog-radius-sm);
  overflow-x: auto;
}
.blog-article-body pre code { background: none; padding: 0; color: inherit; }
.blog-article-body blockquote {
  border-left: 3px solid var(--blog-color-primary);
  padding-left: 16px;
  margin: 0 0 20px;
  color: var(--blog-color-text-muted);
  font-style: italic;
}

/* Tables (section 19) — normal on desktop, horizontal scroll on mobile */
.blog-article-body table {
  border-collapse: collapse;
  width: 100%;
  margin: 0 0 24px;
}
.blog-article-body th, .blog-article-body td {
  border: 1px solid var(--blog-color-border);
  padding: 10px 12px;
  text-align: left;
  font-size: 0.95rem;
}
.blog-article-body th { background: var(--blog-color-surface-muted); font-weight: 700; }
@media (max-width: 768px) {
  .blog-article-body table { display: block; overflow-x: auto; white-space: nowrap; }
}

/* Callout boxes — authors write <div class="blog-callout blog-callout--tip">
   directly in Markdown (Python-Markdown passes block-level raw HTML through). */
.blog-callout {
  border: 1px solid var(--blog-color-border);
  border-left-width: 4px;
  border-radius: var(--blog-radius-sm);
  padding: 14px 18px;
  margin: 0 0 24px;
  font-size: 0.97rem;
}
.blog-callout--information { border-left-color: #2563eb; background: #eff6ff; }
.blog-callout--tip { border-left-color: #16a34a; background: #f0fdf4; }
.blog-callout--warning { border-left-color: #d97706; background: #fffbeb; }
.blog-callout--example { border-left-color: #7c3aed; background: #f5f3ff; }

/* ── Table of contents ────────────────────────────────────────────────── */
.blog-toc {
  border: 1px solid var(--blog-color-border);
  border-radius: var(--blog-radius-sm);
  padding: 4px 18px 14px;
  margin: 0 0 32px;
  background: var(--blog-color-surface-muted);
}
.blog-toc-summary {
  cursor: pointer;
  font-weight: 700;
  padding: 12px 0;
  color: var(--blog-color-text);
}
.blog-toc-list { list-style: none; margin: 8px 0 0; padding: 0; }
.blog-toc-item { margin-bottom: 6px; font-size: 0.92rem; }
.blog-toc-item--h3 { margin-left: 16px; }
.blog-toc a { color: var(--blog-color-primary); text-decoration: none; }
.blog-toc a:hover { text-decoration: underline; }
.blog-toc-item ul { list-style: none; margin: 6px 0 0; padding-left: 16px; }

/* ── Tool CTA ─────────────────────────────────────────────────────────── */
.blog-tool-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid var(--blog-color-border);
  border-radius: var(--blog-radius);
  padding: 20px 24px;
  margin: 32px 0;
  background: var(--blog-color-surface-muted);
}
.blog-tool-cta-headline { font-weight: 700; color: var(--blog-color-text); margin: 0 0 4px; }
.blog-tool-cta-description { color: var(--blog-color-text-muted); margin: 0; font-size: 0.92rem; }
.blog-tool-cta-button { flex-shrink: 0; white-space: nowrap; }

/* ── Related articles ─────────────────────────────────────────────────── */
.blog-related-articles { margin-top: 40px; }

/* ── Author block ─────────────────────────────────────────────────────── */
.blog-author-block {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 0;
  margin-top: 8px;
}
.blog-author-block-avatar { border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.blog-author-block-name { font-weight: 700; color: var(--blog-color-text); text-decoration: none; display: block; }
a.blog-author-block-name:hover { color: var(--blog-color-primary); }
.blog-author-block-expertise { font-size: 0.85rem; color: var(--blog-color-primary); margin: 2px 0 6px; }
.blog-author-block-bio { font-size: 0.92rem; color: var(--blog-color-text-muted); margin: 0; }

/* ── Category page ────────────────────────────────────────────────────── */
.blog-category-header { padding-top: 8px; padding-bottom: 24px; }
.blog-category-title { font-size: 1.8rem; font-weight: 800; color: var(--blog-color-text); margin: 0 0 10px; }
.blog-category-description { color: var(--blog-color-text-muted); max-width: var(--blog-content-width); }

/* ── Author archive page ──────────────────────────────────────────────── */
.blog-author-header { padding-top: 8px; padding-bottom: 16px; }

/* ── Pagination ───────────────────────────────────────────────────────── */
.blog-pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--blog-color-border);
  font-size: 0.92rem;
}
.blog-pagination a { color: var(--blog-color-primary); text-decoration: none; font-weight: 600; }
.blog-pagination a:hover { text-decoration: underline; }
.blog-pagination-status { color: var(--blog-color-text-muted); }

/* ── 404 ──────────────────────────────────────────────────────────────── */
.blog-404 { padding: 100px 0; text-align: center; }
.blog-404 h1 { font-size: 1.8rem; margin-bottom: 12px; }
.blog-404 p { color: var(--blog-color-text-muted); margin-bottom: 24px; }