.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-3);
}

.section {
  padding: var(--spacing-10) 0;
}

.section-light {
  background-color: var(--color-surface);
}

.section-dark {
  background-color: var(--color-primary-dark);
  color: var(--color-text-light);
}

.section-dark h1, .section-dark h2, .section-dark h3, .section-dark p {
  color: var(--color-text-light);
}

.grid {
  display: grid;
  gap: var(--spacing-4);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }

.text-center { text-align: center; }

/* Responsive adjustments */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: var(--spacing-6) 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  
  .md-flex-col { flex-direction: column; }
  .md-reverse { flex-direction: column-reverse; }
}