/* ─────────────────────────────────────────────────────────────────────
   SEDA Blog styles
   Used by:
     - /blog/index.html              (library / index page)
     - /blog/<slug>/index.html       (individual post pages)
     - /blog-template-preview.html   (design reference)
     - /blog-index-preview.html      (design reference)
   All colors / spacing / radii reference design tokens declared in
   seda.css, so the site-wide dark/light theme toggle just works.
   ─────────────────────────────────────────────────────────────────── */

/* ── Shared shell ───────────────────────────────────────────────── */
.blog-shell { padding-bottom: 80px; }


/* ═════════════════════════════════════════════════════════════════
   INDEX / LIBRARY PAGE
   ═════════════════════════════════════════════════════════════════ */

/* ── Hero ──────────────────────────────────────────────────────── */
.blog-hero {
  padding: 80px 0 40px;
}
.blog-hero h1 {
  font-family: var(--font-sans);
  font-size: clamp(40px, 6vw, 64px);
  font-weight: var(--weight-regular);
  letter-spacing: -0.03em; line-height: 1.05;
  color: var(--text-primary);
  max-width: 760px;
  margin: 0 0 16px;
}
.blog-hero h1 .accent { color: var(--primary-400); }
.blog-hero p {
  font-family: var(--font-sans);
  font-size: 20px; line-height: 1.5;
  color: var(--text-muted);
  font-weight: 300;
  max-width: 640px;
  margin: 0;
}

/* ── Search + filters ──────────────────────────────────────────── */
.blog-search-wrap { padding: 24px 0 16px; }
.blog-search {
  width: 100%;
  max-width: 480px;
  padding: 12px 16px 12px 44px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-default);
  background-color: var(--bg-input);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px; font-weight: 400;
  outline: none;
  transition: border-color var(--duration-slow) ease;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%23a8a4b7' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: 14px center;
}
.blog-search::placeholder { color: var(--text-muted); }
.blog-search:focus { border-color: var(--primary-400); }

.blog-filters {
  display: flex; gap: 8px; flex-wrap: wrap;
  padding: 16px 0 40px;
}
.blog-filter-btn {
  padding: 8px 18px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-default);
  background: transparent;
  font-family: var(--font-sans);
  font-size: 14px; font-weight: var(--weight-medium);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--duration-slow) ease;
}
.blog-filter-btn:hover { border-color: var(--primary-400); color: var(--primary-400); }
.blog-filter-btn.active {
  background: var(--text-primary);
  color: var(--bg-page);
  border-color: var(--text-primary);
}

/* ── Featured row (large card + one regular) ───────────────────── */
.blog-featured-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}
@media (max-width: 900px) {
  .blog-featured-row { grid-template-columns: 1fr; }
}

/* ── Post grid (3-up) ──────────────────────────────────────────── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 900px) {
  .blog-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .blog-grid { grid-template-columns: 1fr; }
}

/* ── Card (shared base) ────────────────────────────────────────── */
.blog-card,
.blog-card-featured {
  background: var(--bg-card-default);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xs);
  overflow: hidden;
  transition: border-color var(--duration-slow) ease, transform var(--duration-slow) ease;
  text-decoration: none;
  color: inherit;
  display: flex; flex-direction: column;
}
.blog-card:hover,
.blog-card-featured:hover {
  border-color: var(--primary-400);
  transform: translateY(-2px);
}

.blog-card-img,
.blog-card-featured-img {
  background: linear-gradient(135deg, var(--primary-200) 0%, var(--primary-300) 100%);
  overflow: hidden;
  display: block;
}
.blog-card-img { aspect-ratio: 16 / 10; }
.blog-card-featured-img { aspect-ratio: 16 / 9; }
.blog-card-img img,
.blog-card-featured-img img {
  width: 100%; height: 100%; object-fit: cover; display: block;
}

/* Featured card body */
.blog-card-featured-body {
  padding: 20px 24px;
  display: flex; flex-direction: column;
  gap: 12px;
}
.blog-card-featured-badge {
  display: inline-flex; align-items: center;
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--success-500);
  background: var(--badge-success-bg);
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  align-self: flex-start;
}
.blog-card-featured-title {
  font-family: var(--font-sans);
  font-size: 26px; font-weight: var(--weight-regular);
  letter-spacing: -0.02em; line-height: 1.2;
  color: var(--text-primary);
  margin: 0;
}
.blog-card-meta-row {
  display: flex; align-items: center; gap: 12px;
  margin-top: 4px;
}
.blog-card-cta {
  margin-left: auto;
  font-size: 14px; font-weight: var(--weight-medium);
  color: var(--text-primary);
  display: inline-flex; align-items: center; gap: 6px;
}
.blog-card-cta .material-symbols-rounded { font-size: 18px; transition: transform var(--duration-slow) ease; }
.blog-card-featured:hover .blog-card-cta .material-symbols-rounded,
.blog-card:hover .blog-card-cta .material-symbols-rounded { transform: translateX(4px); }

/* Regular card body */
.blog-card-body {
  padding: 16px 20px;
  display: flex; align-items: center; gap: 10px;
}
.blog-card-title {
  font-family: var(--font-sans);
  font-size: 18px; font-weight: var(--weight-regular);
  letter-spacing: -0.01em; line-height: 1.3;
  color: var(--text-primary);
  margin: 0;
  flex: 1;
}

/* Category chip used on cards */
.blog-card-cat {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: var(--weight-medium);
  color: var(--primary-400);
  letter-spacing: 0.08em; text-transform: uppercase;
}
.blog-card-cat::before {
  content: '';
  width: 18px; height: 18px; border-radius: 5px;
  background: var(--primary-300);
  flex-shrink: 0;
}

/* Variant: when category sits above title (used inside featured + regular) */
.blog-card-stack { display: flex; flex-direction: column; gap: 6px; }

/* ── Pagination ────────────────────────────────────────────────── */
.blog-pagination {
  display: flex; justify-content: center; gap: 8px;
  padding: 48px 0 0;
}
.blog-page-btn {
  min-width: 40px; height: 40px;
  padding: 0 12px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-default);
  background: transparent;
  font-family: var(--font-sans);
  font-size: 14px; font-weight: var(--weight-medium);
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  transition: all var(--duration-slow) ease;
}
.blog-page-btn:hover:not(:disabled) {
  border-color: var(--primary-400); color: var(--primary-400);
}
.blog-page-btn.active {
  background: var(--text-primary);
  color: var(--bg-page);
  border-color: var(--text-primary);
}
.blog-page-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.blog-page-btn .material-symbols-rounded { font-size: 18px; }


/* ═════════════════════════════════════════════════════════════════
   ARTICLE / POST PAGE
   ═════════════════════════════════════════════════════════════════ */

/* ── Back link ──────────────────────────────────────────────────── */
.article-back-wrap {
  max-width: 760px; margin: 32px auto 0; padding: 0 24px;
}
.article-back {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: var(--weight-medium);
  color: var(--text-muted);
  text-decoration: none;
}
.article-back:hover { color: var(--primary-400); }
.article-back .material-symbols-rounded { font-size: 18px; }

/* ── Hero image ─────────────────────────────────────────────────── */
.article-hero {
  max-width: 760px; margin: 24px auto 0; padding: 0 24px;
}
.article-hero-inner {
  border-radius: var(--radius-xs);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--primary-200) 0%, var(--primary-300) 100%);
}
.article-hero-inner img {
  width: 100%; height: 100%; display: block; object-fit: cover;
}

/* ── Article header (category + meta + title) ───────────────────── */
.article-header {
  max-width: 760px; margin: 0 auto; padding: 32px 24px 24px;
}
.article-header .cat-row {
  display: flex; align-items: center; gap: 12px; margin-bottom: 20px;
  flex-wrap: wrap;
}
.article-cat {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: var(--weight-medium);
  color: var(--primary-400);
  letter-spacing: 0.08em; text-transform: uppercase;
}
.article-cat::before {
  content: '';
  width: 20px; height: 20px; border-radius: 5px;
  background: var(--primary-300);
  flex-shrink: 0;
}
.article-meta {
  font-size: 13px; color: var(--text-muted);
  display: flex; gap: 12px; flex-wrap: wrap;
}
.article-meta span:not(:first-child)::before {
  content: '·'; margin-right: 12px; color: var(--text-muted);
}
.article-header h1 {
  font-family: var(--font-sans);
  font-size: clamp(32px, 5vw, 44px);
  font-weight: var(--weight-regular);
  letter-spacing: -0.03em; line-height: 1.15;
  color: var(--text-primary);
  margin: 0;
}

/* ── Divider ───────────────────────────────────────────────────── */
.article-divider-wrap {
  max-width: 760px; margin: 0 auto; padding: 0 24px;
}
.article-divider {
  margin: 0;
  border: 0;
  border-top: 1px solid var(--border-default);
}

/* ── Article body ───────────────────────────────────────────────── */
.article-content {
  max-width: 760px; margin: 0 auto; padding: 32px 24px 80px;
  font-family: var(--font-sans);
}
.article-content > *:first-child { margin-top: 0; }
.article-content > *:last-child  { margin-bottom: 0; }

.article-content h2 {
  font-size: 28px; font-weight: var(--weight-regular);
  letter-spacing: -0.02em; line-height: 1.25;
  color: var(--text-primary);
  margin: 48px 0 16px;
}
.article-content h3 {
  font-size: 22px; font-weight: var(--weight-regular);
  letter-spacing: -0.01em; line-height: 1.3;
  color: var(--text-primary);
  margin: 36px 0 12px;
}
.article-content h4 {
  font-size: 18px; font-weight: var(--weight-medium);
  line-height: 1.4; color: var(--text-secondary);
  margin: 28px 0 10px;
}

.article-content p {
  font-size: 17px; line-height: 1.75;
  color: var(--text-secondary);
  font-weight: 300;
  margin: 0 0 20px;
}

.article-content a {
  color: var(--primary-400);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color var(--duration-slow) ease;
}
.article-content a:hover { color: var(--primary-500); }

.article-content strong {
  color: var(--text-primary);
  font-weight: var(--weight-medium);
}
.article-content em { font-style: italic; }

.article-content ul,
.article-content ol {
  font-size: 17px; line-height: 1.75;
  color: var(--text-secondary);
  font-weight: 300;
  margin: 0 0 20px 24px;
  padding: 0;
}
.article-content li { margin: 0 0 8px; }
.article-content li > ul,
.article-content li > ol { margin-top: 8px; }

.article-content code {
  background: var(--bg-card-high);
  color: var(--text-primary);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 14px;
}
.article-content pre {
  background: var(--bg-card-high);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-xs);
  padding: 20px;
  overflow-x: auto;
  margin: 0 0 24px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-primary);
}
.article-content pre code {
  background: none; padding: 0; font-size: inherit;
}

.article-content blockquote {
  border-left: 3px solid var(--primary-400);
  padding: 4px 0 4px 20px;
  margin: 24px 0;
  color: var(--text-muted);
  font-style: italic;
}
.article-content blockquote p:last-child { margin-bottom: 0; }

.article-content hr {
  border: 0; border-top: 1px solid var(--border-default);
  margin: 40px 0;
}

.article-content img,
.article-content .inline-img {
  width: 100%; height: auto; display: block;
  border-radius: var(--radius-xs);
  margin: 32px 0;
  aspect-ratio: 16 / 9; object-fit: cover;
}
/* Placeholder gradient used in the preview file for stand-in images */
.article-content .inline-img {
  background: linear-gradient(135deg, var(--primary-200) 0%, var(--primary-300) 100%);
}
.article-content figure { margin: 32px 0; }
.article-content figure img { margin: 0; }
.article-content figcaption {
  font-size: 13px; color: var(--text-muted);
  text-align: center; margin-top: 12px;
  font-style: italic;
}