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

.container--narrow {
  max-width: var(--container-narrow);
}

.site-main {
  min-height: calc(100vh - 80px);
}

.section {
  padding: var(--space-3xl) 0;
}

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

.section--alt {
  background-color: var(--color-bg-alt);
}

.section--accent {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section__header h2 {
  margin-bottom: var(--space-sm);
}

.section__header p {
  max-width: 600px;
  margin: 0 auto;
}

/* Grid */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid--2 {
  grid-template-columns: 1fr;
}

.grid--3 {
  grid-template-columns: 1fr;
}

.grid--4 {
  grid-template-columns: 1fr;
}

/* Flex */
.flex {
  display: flex;
}

.flex--center {
  align-items: center;
  justify-content: center;
}

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

.flex--wrap {
  flex-wrap: wrap;
}

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

.flex--gap-sm { gap: var(--space-sm); }
.flex--gap-md { gap: var(--space-md); }
.flex--gap-lg { gap: var(--space-lg); }

/* Two column layout */
.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

/* Mobile-first adjustments */
@media (max-width: 480px) {
  .container { padding: 0 var(--space-md); }
  .section { padding: var(--space-xl) 0; }
  .section__header { margin-bottom: var(--space-lg); }
  .split { gap: var(--space-lg); }
}

/* Responsive */
@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .split { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1280px) {
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}