/* ============================================================
   Blog — article-page + index card layout
   Builds on landing.css tokens; light + dark parity via
   CSS variables (no hardcoded hex).
   ============================================================ */

/* ── Shared article-page layout ─────────────────────────── */
.article-page {
  max-width: 760px;
  margin: 0 auto;
  padding: calc(var(--nav-h) + var(--sp-12)) var(--sp-6) var(--sp-20);
  scroll-padding-top: calc(var(--nav-h) + var(--sp-4));
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  align-items: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--sp-8);
}
.breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 200ms;
}
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb [aria-hidden="true"] { color: var(--color-text-dim); }

/* ── Article header ─────────────────────────────────────── */
.article-head {
  margin-bottom: var(--sp-10);
}
.article-tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: color-mix(in oklch, var(--color-primary) 12%, transparent);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--sp-4);
}
.article-head h1 {
  font-family: var(--font-family-display);
  font-size: clamp(2rem, 4vw + 1rem, 2.875rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--color-text-primary);
  margin-bottom: var(--sp-5);
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  align-items: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--sp-6);
}
.article-meta [aria-hidden="true"] { color: var(--color-text-dim); }
.article-lede {
  font-size: 1.1875rem;
  line-height: 1.55;
  color: var(--color-text-secondary);
  font-weight: 400;
  border-block-start: 1px solid var(--color-border);
  padding-block-start: var(--sp-6);
}

/* ── Article body ───────────────────────────────────────── */
.article-body {
  font-size: 1.0625rem;
  line-height: 1.78;
  color: var(--color-text-secondary);
}
.article-body h2 {
  font-family: var(--font-family-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--color-text-primary);
  margin-top: var(--sp-12);
  margin-bottom: var(--sp-4);
}
.article-body h3 {
  font-family: var(--font-family-display);
  font-size: 1.1875rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-top: var(--sp-8);
  margin-bottom: var(--sp-3);
}
.article-body p {
  margin-bottom: var(--sp-5);
}
.article-body ul,
.article-body ol {
  margin-bottom: var(--sp-6);
  padding-inline-start: var(--sp-6);
  list-style: disc;
}
.article-body li {
  margin-bottom: var(--sp-3);
  line-height: 1.7;
}
.article-body li::marker {
  color: var(--color-primary);
}
.article-body strong {
  color: var(--color-text-primary);
  font-weight: 600;
}
.article-body a {
  color: var(--color-primary);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: text-decoration-thickness 160ms;
}
.article-body a:hover {
  text-decoration-thickness: 2px;
}
.article-body code {
  font-family: ui-monospace, 'SF Mono', 'Roboto Mono', Menlo, monospace;
  font-size: 0.9em;
  padding: 2px 6px;
  border-radius: 4px;
  background: color-mix(in oklch, var(--color-text-muted) 10%, transparent);
  color: var(--color-text-primary);
}
.article-disclaimer {
  background: color-mix(in oklch, var(--color-primary) 5%, var(--color-bg-surface));
  border: 1px solid color-mix(in oklch, var(--color-primary) 18%, var(--color-border));
  border-radius: var(--r-md);
  padding: var(--sp-4) var(--sp-5);
  margin-bottom: var(--sp-8);
  font-size: 0.9375rem;
  line-height: 1.6;
}
.article-disclaimer strong { color: var(--color-primary); }

/* ── Article footer / CTA ────────────────────────────────── */
.article-foot {
  margin-top: var(--sp-16);
  padding-top: var(--sp-10);
  border-top: 1px solid var(--color-border);
}
.article-cta {
  background: color-mix(in oklch, var(--color-primary) 6%, var(--color-bg-surface));
  border: 1px solid color-mix(in oklch, var(--color-primary) 22%, var(--color-border));
  border-radius: var(--r-xl);
  padding: var(--sp-8) var(--sp-7);
  text-align: center;
  margin-bottom: var(--sp-8);
}
.article-cta h3 {
  font-family: var(--font-family-display);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--sp-3);
}
.article-cta p {
  color: var(--color-text-secondary);
  margin-bottom: var(--sp-5);
  max-width: 480px;
  margin-inline: auto;
}
.article-nav {
  text-align: center;
  font-size: 0.9375rem;
}
.article-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 200ms;
}
.article-nav a:hover { color: var(--color-primary); }

/* ── Blog index — article cards ───────────────────────── */
.blog-page {
  max-width: 1080px;
  margin: 0 auto;
  padding: calc(var(--nav-h) + var(--sp-12)) var(--sp-6) var(--sp-20);
}
.blog-page > .breadcrumb {
  margin-bottom: var(--sp-6);
}
.blog-page > h1 {
  font-family: var(--font-family-display);
  font-size: clamp(2.25rem, 4vw + 1rem, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--color-text-primary);
  margin-bottom: var(--sp-5);
}
.blog-page > .blog-lede {
  font-size: 1.1875rem;
  line-height: 1.55;
  color: var(--color-text-secondary);
  max-width: 720px;
  margin-bottom: var(--sp-12);
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--sp-6);
  margin-bottom: var(--sp-16);
}
.article-card {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  padding: var(--sp-6);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--r-xl);
  text-decoration: none;
  color: inherit;
  transition:
    border-color 280ms cubic-bezier(0.2, 0, 0, 1),
    transform 280ms cubic-bezier(0.2, 0, 0, 1),
    box-shadow 280ms cubic-bezier(0.2, 0, 0, 1);
}
.article-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in oklch, var(--color-primary) 38%, var(--color-border));
  box-shadow: 0 14px 28px -12px color-mix(in oklch, var(--color-primary) 22%, transparent);
}
.article-card .article-tag {
  margin-bottom: 0;
  align-self: flex-start;
}
.article-card h2 {
  font-family: var(--font-family-display);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--color-text-primary);
  line-height: 1.25;
  margin: 0;
  transition: color 200ms;
}
.article-card:hover h2 { color: var(--color-primary); }
.article-card .article-card-excerpt {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.65;
  margin: 0;
  flex: 1;
}
.article-card .article-card-meta {
  display: flex;
  gap: var(--sp-2);
  align-items: center;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--sp-2);
}
.article-card .article-card-meta [aria-hidden="true"] { color: var(--color-text-dim); }
.article-card .read-more {
  margin-top: var(--sp-2);
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9375rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 200ms;
}
.article-card:hover .read-more { gap: 10px; }

/* ── RTL fine-tuning for arrows/icons ────────────────── */
html[dir="rtl"] .article-card .read-more::after,
html[dir="rtl"] .breadcrumb [aria-hidden="true"] {
  /* Arrows ›, →, ← read naturally if we use logical chars; no flip needed. */
}

/* ── Reduced motion ───────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .article-card,
  .article-card .read-more,
  .article-card h2,
  .breadcrumb a,
  .article-body a {
    transition: none !important;
  }
  .article-card:hover { transform: none; }
}