.topic-shell {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px 64px;
}

.topic-hero-strip {
  background: linear-gradient(105deg, #01040f 0%, #0c4a6e 55%, #020F2F 100%);
  border-bottom: 1px solid var(--border);
  padding: 48px 20px;
  margin-bottom: 36px;
}

.topic-hero-strip h1 {
  max-width: var(--max);
  margin: 0 auto;
  font-size: clamp(1.6rem, 3.2vw, 2.3rem);
}

.topic-hero-strip p {
  max-width: var(--max);
  margin: 10px auto 0;
  color: rgba(229, 231, 235, 0.75);
  font-size: 15px;
}

.topic-sidebar-grid {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 36px;
  align-items: start;
}

.topic-sidebar {
  position: sticky;
  top: 80px;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 20px;
}

.topic-sidebar h2 {
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.topic-sidebar ul {
  list-style: none;
  display: grid;
  gap: 8px;
}

.topic-sidebar a {
  font-size: 13px;
  color: var(--muted);
}

.topic-sidebar a:hover {
  color: var(--primary);
}

.topic-prose h2 {
  margin: 28px 0 12px;
  font-size: 1.2rem;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.topic-prose h3 {
  margin: 20px 0 8px;
  font-size: 1.05rem;
}

.topic-prose p {
  color: var(--muted);
  margin-bottom: 14px;
  font-size: 15px;
}

.topic-prose ul {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 15px;
  display: grid;
  gap: 6px;
}

.topic-pull {
  margin: 28px 0;
  padding: 24px 28px;
  background: rgba(56, 189, 248, 0.07);
  border-left: 3px solid var(--primary);
  font-size: 1.05rem;
  color: var(--text);
}

.topic-stat-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  margin: 32px 0;
}

.topic-stat-band div {
  background: var(--surface);
  padding: 20px;
  text-align: center;
}

.topic-stat-band strong {
  display: block;
  color: var(--primary);
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.topic-stat-band span {
  font-size: 12px;
  color: var(--muted);
}

.topic-split-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: center;
  margin: 28px 0;
}

.topic-img-rail {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin: 24px 0;
}

.topic-img-rail .decor-wrap {
  flex: 1 1 200px;
}

.topic-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0 28px;
  font-size: 14px;
}

.topic-table th,
.topic-table td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
  color: var(--muted);
}

.topic-table th {
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
}

.topic-mosaic-band {
  margin: 32px 0;
  height: 180px;
  max-width: 100%;
  width: 100%;
  background-size: cover;
  background-position: center;
  border: 1px solid var(--border);
  overflow: hidden;
}

@media (max-width: 860px) {
  .topic-sidebar-grid,
  .topic-split-visual,
  .topic-stat-band {
    grid-template-columns: 1fr;
  }

  .topic-sidebar {
    position: static;
  }

  .topic-mosaic-band {
    height: 140px;
    max-width: 100%;
  }

  .topic-img-rail .decor-wrap {
    flex: 1 1 100%;
    max-width: 100%;
  }
}

@media (max-width: 375px) {
  .topic-mosaic-band {
    height: 120px;
    max-width: 100%;
  }

  .topic-shell {
    padding-left: 12px;
    padding-right: 12px;
  }

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