.topic-hero-strip {
  background: var(--secondary);
  padding: 48px 24px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.topic-hero-strip h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 400;
  color: var(--primary);
  max-width: 800px;
  margin: 0 auto 12px;
  letter-spacing: 0.04em;
}

.topic-hero-strip p {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto;
}

.topic-sidebar-layout {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 48px 24px 64px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

@media (min-width: 900px) {
  .topic-sidebar-layout {
    grid-template-columns: 240px 1fr;
  }
}

.topic-sidebar {
  position: sticky;
  top: 80px;
  align-self: start;
}

.topic-sidebar-nav {
  list-style: none;
  border: 1px solid var(--border);
  background: rgba(31, 2, 43, 0.5);
}

.topic-sidebar-nav li a {
  display: block;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--text);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  transition: color 0.4s ease, background 0.4s ease;
}

.topic-sidebar-nav li:last-child a {
  border-bottom: none;
}

.topic-sidebar-nav li a:hover {
  color: var(--accent);
  background: rgba(45, 212, 191, 0.06);
}

.topic-content h2 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--primary);
  margin: 36px 0 16px;
}

.topic-content h2:first-child {
  margin-top: 0;
}

.topic-content p {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--text);
  margin-bottom: 16px;
  line-height: 1.75;
}

.topic-pull-quote {
  border-left: 3px solid var(--accent);
  padding: 20px 28px;
  margin: 28px 0;
  background: rgba(45, 212, 191, 0.05);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 17px;
  color: var(--primary);
}

.topic-image-pair {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin: 32px 0;
}

@media (min-width: 600px) {
  .topic-image-pair {
    grid-template-columns: 1fr 1fr;
  }
}

.topic-img-frame {
  width: 100%;
  max-width: 500px;
  max-height: 320px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.topic-img-frame img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

@media (max-width: 375px) {
  .topic-image-pair {
    max-width: 100%;
    overflow: hidden;
  }

  .topic-img-frame {
    max-width: 100%;
    max-height: 240px;
  }
}

.topic-data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-family: var(--font-sans);
  font-size: 14px;
}

.topic-data-table th,
.topic-data-table td {
  padding: 12px 16px;
  border: 1px solid var(--border);
  text-align: left;
}

.topic-data-table th {
  background: rgba(126, 34, 206, 0.2);
  color: var(--primary);
}

.topic-back-link {
  display: inline-block;
  margin-top: 32px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--accent);
}