/* Activity Grid Styles */
.activities-grid {
  margin: var(--space-xl) 0;
}

.section-header {
  text-align: center;
  margin: var(--space-xl) 0 var(--space-lg);
}

.section-header h2 {
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
  font-size: 1.75rem;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

.feature-card {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--bg-secondary), #f0f7ff);
  border: 2px solid rgba(79, 172, 254, 0.1);
  position: relative;
  transition: transform 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-2px);
}

.thumb-science {
  background: linear-gradient(135deg, #4158D0, #C850C0);
}