/* =============================================================
   Successionia — Silo & Article shared styles
   ============================================================= */

/* Editorial hero with breadcrumb */
.silo-hero {
  padding: var(--space-7) 0 var(--space-9);
  background: var(--brand-cream);
  position: relative;
  overflow: hidden;
}
.silo-hero__inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--space-9);
  align-items: center;
}
.silo-hero h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(2.5rem, 4.5vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: var(--space-4) 0 var(--space-5);
}
.silo-hero h1 em {
  font-style: italic;
  color: var(--accent-sage-ink);
  font-weight: 500;
}
.silo-hero__lede {
  font-size: 1.2rem;
  color: var(--fg-2);
  line-height: 1.55;
  max-width: 560px;
}
.silo-hero__art {
  position: relative;
  aspect-ratio: 4/5;
  border-radius: var(--radius-2xl);
  background: linear-gradient(
    135deg,
    var(--brand-cream-deep) 0%,
    var(--brand-cream) 60%
  );
  overflow: hidden;
  border: 1px solid var(--border-strong);
}
.silo-hero__art-inner {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
}

/* TOC */
.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}
.toc__title {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: var(--space-4);
}
.toc ol {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: toc;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.toc li {
  counter-increment: toc;
}
.toc a {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-2);
  border-radius: var(--radius-md);
  color: var(--fg-1);
  font-size: 0.9375rem;
  transition: all var(--dur-fast) var(--ease-out);
}
.toc a::before {
  content: counter(toc, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-3);
  flex-shrink: 0;
  font-weight: 500;
}
.toc a:hover {
  background: var(--bg-muted);
  color: var(--accent-sage-ink);
}
.toc a:hover::before {
  color: var(--accent-sage-ink);
}

/* Article body layout */
.article-layout {
  display: grid;
  grid-template-columns: 720px 1fr;
  gap: var(--space-9);
  padding: var(--space-9) 0 var(--space-11);
  align-items: start;
}
.article-aside {
  position: sticky;
  top: calc(var(--site-nav-h) + 24px);
}
.aside-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
}
.aside-card h5 {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin: 0 0 var(--space-3);
}
.aside-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.aside-card a {
  font-size: 0.875rem;
  color: var(--fg-2);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
}
.aside-card a:hover {
  background: var(--brand-cream);
  color: var(--accent-sage-ink);
}
.aside-card a::before {
  content: "→";
  font-size: 0.75rem;
  color: var(--fg-3);
}

.aside-cta {
  background: var(--brand-trunk);
  color: var(--brand-cream);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
}
.aside-cta h4 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.25rem;
  line-height: 1.15;
  color: white;
  margin: 0 0 var(--space-3);
}
.aside-cta p {
  font-size: 0.875rem;
  color: rgba(245, 242, 234, 0.78);
  margin: 0 0 var(--space-4);
}
.aside-cta .btn {
  width: 100%;
}

/* Related articles grid at silo bottom */
.related-section {
  padding: var(--space-10) 0;
  background: var(--brand-cream);
}

/* Cluster mini-card */
.cluster-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  transition: all var(--dur-base) var(--ease-out);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}
.cluster-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}
.cluster-card__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.7rem;
  color: var(--fg-3);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 600;
}
.cluster-card__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.4rem;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
}
.cluster-card__excerpt {
  font-size: 0.875rem;
  color: var(--fg-2);
  margin: 0;
  line-height: 1.55;
}
.cluster-card__cta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent-sage-ink);
  margin-top: auto;
}

/* Key concepts section */
.concept-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-9);
  padding: var(--space-9) 0;
  align-items: center;
  border-top: 1px solid var(--border);
}
.concept-block.is-reverse > div:first-child {
  order: 2;
}
.concept-block h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 2.25rem;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0 0 var(--space-4);
}
.concept-block p {
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--fg-2);
  margin: 0 0 var(--space-4);
}
.concept-block__visual {
  aspect-ratio: 4/3;
  border-radius: var(--radius-xl);
  background: var(--brand-cream);
  padding: var(--space-6);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Order table for inheritance order page */
.order-table {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.order-row {
  display: grid;
  grid-template-columns: 48px 1fr 200px;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.order-row__num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--brand-trunk);
  color: var(--brand-cream);
  display: grid;
  place-items: center;
  font-family: var(--font-serif);
  font-weight: 500;
}
.order-row__title {
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 2px;
}
.order-row__desc {
  font-size: 0.8125rem;
  color: var(--fg-3);
}
.order-row__art {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 4px 10px;
  background: var(--bg-muted);
  border-radius: var(--radius-sm);
  align-self: center;
  text-align: center;
}

/* Visual: parts pie */
.parts-pie {
  width: 280px;
  height: 280px;
  position: relative;
}
.parts-pie__legend {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.parts-pie__legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
}
.parts-pie__sw {
  width: 14px;
  height: 14px;
  border-radius: 3px;
}

/* Comparison table */
.compare-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.compare-table th,
.compare-table td {
  padding: 14px 18px;
  text-align: left;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.compare-table th {
  background: var(--bg-muted);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--fg-3);
}
.compare-table tr:last-child td {
  border-bottom: none;
}
.compare-table td.num {
  font-family: var(--font-mono);
  font-weight: 600;
}
.compare-table .ok {
  color: var(--success-fg);
}
.compare-table .no {
  color: var(--danger-fg);
}