.topic-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 40px 24px 56px;
  overflow: hidden;
}

.topic-rail {
  border-right: 1px solid var(--border);
  padding-right: 20px;
}

.topic-rail img {
  max-width: 200px;
  max-height: 320px;
  margin-bottom: 16px;
  border: 1px solid var(--border);
}

.topic-rail ul {
  list-style: none;
  font-family: var(--metrics-font);
  font-size: 11px;
}

.topic-rail li {
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
}

.topic-body h1 {
  font-family: var(--metrics-font);
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  color: var(--primary);
  margin-bottom: 20px;
}

.topic-body h2 {
  font-family: var(--metrics-font);
  font-size: 0.95rem;
  color: var(--accent);
  margin: 24px 0 10px;
}

.topic-body p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 12px;
  line-height: 1.65;
}

@media (max-width: 768px) {
  .topic-layout {
    grid-template-columns: 1fr;
    padding-left: 16px;
    padding-right: 16px;
  }
  .topic-rail {
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding-right: 0;
    padding-bottom: 20px;
    overflow: hidden;
  }
  .topic-rail img {
    max-width: 100%;
    width: 100%;
    height: auto;
  }
}

@media (max-width: 375px) {
  .topic-rail img {
    max-height: 240px;
    object-fit: contain;
  }
}