/* ============================================================
   PassBy — ARTICLES PAGES
   Reuses tokens from shared.css. Adds:
     - article list grid (cards)
     - article card visual
     - article detail page hero + content typography
     - rendered markdown content styles (h2, h3, ul, blockquote, code, table)
     - sidebar with categories
     - pagination
   ============================================================ */

/* ── PAGE HEADER ─────────────────────────────────────────── */
.articles-hero {
  padding: 160px 0 60px;
  text-align: center;
  position: relative;
}
.articles-hero .eyebrow { animation: fadeUp .6s var(--ease-out) forwards; }
.articles-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 5vw, 52px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-top: var(--sp-3);
  opacity: 0;
  animation: fadeUp .7s .08s var(--ease-out) forwards;
}
.articles-hero p {
  margin-top: var(--sp-3);
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.6;
  max-width: 540px;
  margin-inline: auto;
  opacity: 0;
  animation: fadeUp .7s .16s var(--ease-out) forwards;
}

/* ── LIST PAGE LAYOUT ────────────────────────────────────── */
.articles-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--sp-6);
  padding-bottom: var(--sp-9);
}
@media (max-width: 900px) {
  .articles-layout { grid-template-columns: 1fr; }
  .articles-sidebar { order: 2; }
}

/* ── SIDEBAR ─────────────────────────────────────────────── */
.articles-sidebar {
  position: sticky;
  top: 90px;
  align-self: start;
  background: var(--surface-1);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  padding: var(--sp-3);
}
.articles-sidebar h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  padding: 8px 12px 6px;
}
.articles-sidebar ul { display: flex; flex-direction: column; gap: 2px; }
.articles-sidebar a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  border-radius: var(--r-md);
  font-size: 14px;
  color: var(--text-secondary);
  transition: background .2s var(--ease), color .2s var(--ease);
}
.articles-sidebar a:hover { background: var(--surface-2); color: var(--text-primary); }
.articles-sidebar a.active {
  background: var(--accent-soft);
  color: var(--accent-2);
  font-weight: 600;
}
.articles-sidebar .count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-tertiary);
  background: var(--surface-2);
  padding: 2px 8px;
  border-radius: var(--r-pill);
}
.articles-sidebar a.active .count {
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: var(--accent-2);
}

/* ── GRID OF CARDS ───────────────────────────────────────── */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--sp-3);
}
@media (max-width: 640px) {
  .articles-grid { grid-template-columns: 1fr; }
}

.article-card {
  display: flex;
  flex-direction: column;
  background: var(--surface-1);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform .3s var(--ease-out), border-color .25s var(--ease), background .25s var(--ease);
}
.article-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-med);
  background: var(--surface-2);
}

.article-card-cover {
  position: relative;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--surface-3), var(--surface-2));
  overflow: hidden;
}
.article-card-cover img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .4s var(--ease-out);
}
.article-card:hover .article-card-cover img { transform: scale(1.04); }

/* Decorative cover fallback (when no cover_url set) */
.article-card-cover-fallback {
  width: 100%; height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 30% 30%, var(--accent-soft), transparent 60%),
    linear-gradient(135deg, var(--surface-3), var(--surface-2));
}
.article-card-cover-fallback svg { width: 36px; height: 36px; opacity: 0.4; }

.article-card-cat {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-2);
  background: color-mix(in srgb, var(--surface-0) 85%, transparent);
  backdrop-filter: blur(8px);
  padding: 5px 10px;
  border-radius: var(--r-pill);
  border: 1px solid var(--border-soft);
}

.article-card-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--sp-3);
  flex: 1;
}
.article-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-tertiary);
}
.article-card-meta .dot {
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--text-tertiary);
}
.article-card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.25;
  color: var(--text-primary);
}
.article-card:hover h3 { color: var(--accent-2); }
.article-card-excerpt {
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-card-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color .2s var(--ease);
}
.article-card:hover .article-card-footer { color: var(--accent-2); }
.article-card-footer svg { width: 14px; height: 14px; transition: transform .2s var(--ease); }
.article-card:hover .article-card-footer svg { transform: translateX(3px); }

/* ── EMPTY STATE ─────────────────────────────────────────── */
.articles-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--sp-8) var(--sp-4);
  color: var(--text-secondary);
}
.articles-empty svg { width: 48px; height: 48px; margin: 0 auto var(--sp-3); opacity: 0.4; }
.articles-empty h3 { font-family: var(--font-display); font-size: 22px; color: var(--text-primary); margin-bottom: 8px; }

/* ── PAGINATION ──────────────────────────────────────────── */
.articles-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: var(--sp-6);
}
.articles-pagination a,
.articles-pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding: 0 12px;
  border-radius: var(--r-md);
  font-size: 14px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  border: 1px solid var(--border-soft);
  background: var(--surface-1);
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.articles-pagination a:hover {
  background: var(--surface-2);
  color: var(--text-primary);
  border-color: var(--border-med);
}
.articles-pagination .current {
  background: var(--cta-bg);
  color: var(--cta-text);
  border-color: var(--cta-bg);
  font-weight: 600;
}
.articles-pagination .disabled {
  opacity: 0.4;
  pointer-events: none;
}
.articles-pagination .ellipsis {
  border: none;
  background: transparent;
}

/* ── DETAIL PAGE ─────────────────────────────────────────── */
.article-detail {
  padding-top: 130px;
  padding-bottom: var(--sp-9);
}

.article-detail-head {
  max-width: 760px;
  margin: 0 auto var(--sp-5);
  text-align: center;
}
.article-detail-cat {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-2);
  background: var(--accent-soft);
  padding: 6px 12px;
  border-radius: var(--r-pill);
  margin-bottom: var(--sp-3);
  text-decoration: none;
}
.article-detail-cat:hover { background: color-mix(in srgb, var(--accent) 22%, transparent); }

.article-detail h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4.5vw, 44px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: var(--sp-3);
}
.article-detail-meta {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-tertiary);
}
.article-detail-meta .dot {
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--text-tertiary);
}

/* Cover image full-width */
.article-detail-cover {
  max-width: 1000px;
  margin: 0 auto var(--sp-6);
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid var(--border-soft);
  aspect-ratio: 16/7;
  background: var(--surface-2);
}
.article-detail-cover img { width: 100%; height: 100%; object-fit: cover; }

/* ── ARTICLE CONTENT (rendered Markdown) ─────────────────── */
.article-content {
  max-width: 760px;
  margin: 0 auto;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  color: var(--text-primary);
}
.article-content > *:first-child { margin-top: 0; }
.article-content > *:last-child { margin-bottom: 0; }

.article-content h2 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.25;
  margin: var(--sp-5) 0 var(--sp-3);
  color: var(--text-primary);
}
.article-content h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin: var(--sp-4) 0 var(--sp-2);
  color: var(--text-primary);
}
.article-content h4 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  margin: var(--sp-3) 0 var(--sp-2);
  color: var(--text-primary);
}
.article-content p { margin: 0 0 var(--sp-3); }
.article-content a {
  color: var(--accent-2);
  text-decoration: underline;
  text-decoration-color: var(--accent-line);
  text-underline-offset: 3px;
  transition: text-decoration-color .2s var(--ease);
}
.article-content a:hover { text-decoration-color: var(--accent-2); }

.article-content ul,
.article-content ol {
  margin: 0 0 var(--sp-3);
  padding-left: var(--sp-4);
}
.article-content li { margin-bottom: 8px; }
.article-content ul li::marker { color: var(--accent-2); }
.article-content ol li::marker { color: var(--text-tertiary); font-family: var(--font-mono); }

.article-content blockquote {
  margin: var(--sp-4) 0;
  padding: var(--sp-3) var(--sp-4);
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  color: var(--text-secondary);
  font-style: italic;
}
.article-content blockquote p { margin: 0; }

.article-content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--surface-3);
  padding: 2px 6px;
  border-radius: var(--r-sm);
  color: var(--accent-2);
}
.article-content pre {
  margin: var(--sp-4) 0;
  padding: var(--sp-3) var(--sp-4);
  background: var(--surface-0);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-md);
  overflow-x: auto;
}
.article-content pre code {
  background: none;
  padding: 0;
  color: var(--text-primary);
  font-size: 13.5px;
  line-height: 1.6;
}

.article-content img {
  width: 100%;
  border-radius: var(--r-md);
  margin: var(--sp-4) 0;
  border: 1px solid var(--border-soft);
}
.article-content hr {
  margin: var(--sp-5) 0;
  border: none;
  border-top: 1px solid var(--border-soft);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--sp-4) 0;
  font-size: 15px;
}
.article-content th,
.article-content td {
  padding: 10px 14px;
  border: 1px solid var(--border-soft);
  text-align: left;
}
.article-content th {
  background: var(--surface-2);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text-primary);
}
.article-content tr:nth-child(even) td { background: var(--surface-1); }

/* ── BACK LINK ───────────────────────────────────────────── */
.article-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 9px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--border-soft);
  background: var(--surface-1);
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
  margin-bottom: var(--sp-4);
}
.article-back:hover {
  color: var(--text-primary);
  border-color: var(--border-med);
  background: var(--surface-2);
}
.article-back svg { width: 14px; height: 14px; }

/* ── RELATED ARTICLES ────────────────────────────────────── */
.article-related {
  max-width: 1180px;
  margin: var(--sp-8) auto 0;
  padding-top: var(--sp-6);
  border-top: 1px solid var(--border-soft);
}
.article-related h2 {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: var(--sp-4);
  text-align: center;
}

/* ── CTA BOX at end of article ───────────────────────────── */
.article-cta {
  max-width: 760px;
  margin: var(--sp-7) auto 0;
  padding: var(--sp-5);
  background: var(--surface-1);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-xl);
  text-align: center;
}
.article-cta h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 10px;
}
.article-cta p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: var(--sp-3);
}
.article-cta .btn-primary { font-size: 14px; padding: 12px 22px; }