.page-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 60px 40px;
  background-color: rgba(30, 41, 59, 0.9); /* Samsung dark card background */
  border-radius: 16px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
  color: #e8ebf0;
  line-height: 1.6;
  font-family: 'Inter', 'Roboto', sans-serif;
}

.page-section {
  margin-bottom: 3em;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5em;
  color: #f2f5fa;
}

.subsection-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  color: #e8ebf0;
}

.section-text {
  font-size: 1rem;
  margin-bottom: 1em;
  color: #cfd8e3;
}

.section-divider {
  border: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 1em;
}

.source-figure {
  margin-bottom: 1em;
}

.source-link {
  color: #60a5fa;
  text-decoration: underline;
}

.source-link:hover {
  color: #4f46e5;
}

.section-list {
  list-style-type: disc;
  padding-left: 2em;
  margin-bottom: 1em;
}

.section-list li {
  margin-bottom: 0.75em;
}

.image-gallery-vertical {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.image-gallery-vertical img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    object-fit: cover;
}