.topic-strip {
  padding: 36px 24px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  color: var(--bg);
}

.topic-strip-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.topic-strip h1 {
  font-size: clamp(24px, 4vw, 36px);
  margin-bottom: 8px;
}

.topic-strip p {
  font-size: 14px;
  opacity: 0.85;
  max-width: 640px;
}

.topic-body {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 24px 72px;
}

.topic-body h2 {
  font-size: 20px;
  color: var(--accent);
  margin: 28px 0 12px;
}

.topic-body h3 {
  font-size: 16px;
  color: var(--primary);
  margin: 20px 0 10px;
}

.topic-body p {
  font-size: 14px;
  margin-bottom: 14px;
}

.topic-body ul,
.topic-body ol {
  margin: 0 0 16px 20px;
  font-size: 14px;
  color: var(--muted);
}

.topic-body li {
  margin-bottom: 8px;
}

.topic-split {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 28px;
  align-items: start;
}

.topic-aside {
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 18px;
  position: sticky;
  top: 80px;
}

.topic-aside h3 {
  margin-top: 0;
}

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

.stat-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 28px 0;
}

.stat-band div {
  border: 1px solid var(--border);
  background: rgba(56,189,248,0.06);
  padding: 16px;
  text-align: center;
}

.stat-band strong {
  display: block;
  font-size: 18px;
  color: var(--primary);
  margin-bottom: 6px;
}

.stat-band span {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.mosaic {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 24px 0;
}

.mosaic .decor-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 8px;
}

.pull {
  font-size: 18px;
  line-height: 1.45;
  color: var(--accent);
  border-left: 3px solid var(--primary);
  padding: 8px 0 8px 16px;
  margin: 24px 0;
}

.hero-band {
  min-height: 180px;
  background-image:
    linear-gradient(120deg, rgba(2,6,23,0.88), rgba(2,15,47,0.75)),
    var(--topic-bg);
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: flex-end;
  padding: 32px 24px;
  border-bottom: 2px solid var(--accent);
}

.hero-band-inner {
  max-width: 1000px;
  margin: 0 auto;
  width: 100%;
}

.hero-band h1 {
  font-size: clamp(24px, 4vw, 34px);
  color: var(--text);
}

.columns-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.note-box {
  margin: 20px 0;
  padding: 16px 18px;
  border: 1px dashed var(--border);
  background: rgba(34,211,238,0.05);
  font-size: 13px;
  color: var(--muted);
}

.timeline {
  border-left: 2px solid var(--border);
  margin: 20px 0 20px 8px;
  padding-left: 20px;
}

.timeline-item {
  margin-bottom: 18px;
  position: relative;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 6px;
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
}

.table-lite {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin: 16px 0 24px;
}

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

.table-lite th {
  background: var(--surface);
  color: var(--primary);
}

@media (max-width: 480px) {
  .topic-split,
  .columns-2,
  .stat-band,
  .mosaic {
    grid-template-columns: 1fr;
  }

  .topic-aside {
    position: static;
  }

  .decor-wrap {
    max-width: 100%;
    width: 100%;
    overflow: hidden;
  }

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

  .hero-band {
    min-height: 120px;
    max-width: 100%;
    overflow: hidden;
  }
}