.topic-hero {
  padding: 48px 24px 36px;
  background:
    linear-gradient(135deg, rgba(204, 255, 0, 0.08), transparent 55%),
    var(--secondary);
  border-bottom: 1px solid var(--border);
}

.topic-hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  gap: 12px;
}

.topic-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.topic-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  max-width: 18ch;
}

.topic-hero .lead {
  color: var(--muted);
  max-width: 58ch;
  font-size: 1.05rem;
}

.topic-layout {
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px 24px 72px;
  display: grid;
  gap: 36px;
}

.topic-layout h2 {
  font-size: 1.35rem;
  margin-bottom: 12px;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.topic-layout h3 {
  font-size: 1.05rem;
  margin: 18px 0 8px;
}

.topic-layout p {
  margin: 0 0 14px;
  color: rgba(242, 242, 242, 0.9);
  max-width: 72ch;
}

.topic-layout ul {
  padding-left: 1.2rem;
  margin: 0 0 16px;
  display: grid;
  gap: 8px;
  color: rgba(242, 242, 242, 0.88);
}

.topic-split {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 28px;
  align-items: start;
}

.topic-rail {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 20px;
  position: sticky;
  top: 76px;
}

.topic-rail .rail-title {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.topic-rail ol {
  padding-left: 1.1rem;
  display: grid;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--muted);
}

.stat-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.stat-band .cell {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 16px;
  text-align: center;
  transition: border-color 0.2s;
}

.stat-band .cell:hover {
  border-color: var(--primary);
}

.stat-band .v {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-band .k {
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 4px;
}

.pull-quote {
  border-left: 4px solid var(--accent);
  padding: 18px 22px;
  background: rgba(50, 205, 50, 0.06);
  font-size: 1.1rem;
  margin: 8px 0;
}

.mosaic {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.mosaic .tile {
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
  max-height: 200px;
}

.mosaic .tile img {
  width: 100%;
  height: 100%;
  max-height: 200px;
  object-fit: cover;
}

.side-visual {
  min-height: 220px;
  max-height: 320px;
  background-size: cover;
  background-position: center;
  border: 1px solid var(--border);
  overflow: hidden;
}

.callout {
  background: var(--secondary);
  border: 1px solid var(--border);
  padding: 18px 20px;
  display: grid;
  gap: 8px;
}

.callout strong {
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 20px;
}

.panel h3 {
  margin-top: 0;
  color: var(--primary);
}

.mini-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin: 12px 0;
}

.mini-table th,
.mini-table td {
  border-bottom: 1px solid var(--border);
  padding: 10px 8px;
  text-align: left;
}

.mini-table th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--primary);
  text-transform: uppercase;
}

.mini-table td.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.hero-strip {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: end;
}

.hero-strip .decor-img {
  border: 1px solid var(--border);
}

@media (max-width: 860px) {
  .topic-split,
  .two-col,
  .hero-strip,
  .mosaic,
  .stat-band {
    grid-template-columns: 1fr;
  }

  .topic-rail {
    position: static;
  }

  .side-visual {
    max-width: 100%;
    width: 100%;
    min-height: 160px;
    max-height: 200px;
    overflow: hidden;
  }

  .mosaic .tile {
    max-width: 100%;
    overflow: hidden;
  }

  .mosaic .tile img {
    max-width: 100%;
    max-height: 180px;
  }

  .hero-strip .decor-img {
    max-width: 100%;
    max-height: 200px;
    width: 100%;
    height: auto;
  }
}

@media (max-width: 375px) {
  .side-visual,
  .mosaic .tile,
  .hero-strip .decor-img,
  .decor-img {
    max-width: 100%;
    overflow: hidden;
  }
}