body {
  background-color: #121212;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: #f1f1f1;
  line-height: 1.6;
}

.commerce-container {
  max-width: 1200px;
  margin: 3rem auto;
  padding: 0 2rem;
}

.commerce-title {
  font-size: 2.5rem;
  color: var(--primary-light, #90caf9);
  text-align: center;
  margin-bottom: 2rem;
}

.section {
  background: var(--card-bg, #1e1e1e);
  border-radius: var(--border-radius, 8px);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-card, 0 4px 10px rgba(0, 0, 0, 0.3));
  border: var(--border-light, 1px solid rgba(255, 255, 255, 0.1));
}

.section h2 {
  color: var(--text-highlight, #ffffff);
  margin-bottom: 1rem;
}

ul.topic-list {
  padding-left: 1.5rem;
}

ul.topic-list li {
  margin-bottom: 0.5rem;
}

.highlight {
  font-weight: bold;
  color: var(--primary-light, #90caf9);
}