/* ================================
   Layout System
   ================================
   Grid, spacing, and structural utilities
   ================================ */

/* ================================
   Structural Elements
   ================================ */

main {
  display: block;
}

section {
  padding-block: var(--space-xxl);
  border-bottom: 1px solid var(--color-border);
}

section:last-of-type {
  border-bottom: none;
}

/* ================================
   Container & Width Constraints
   ================================ */

.container,
.section-inner {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

/* Larger container option */
.container.lg {
  max-width: var(--max-width-lg);
}

/* Medium container option */
.container.md {
  max-width: var(--max-width-md);
}

/* ================================
   Grid Utilities
   ================================ */

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

/* ================================
   Flex Utilities
   ================================ */

.flex {
  display: flex;
}

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

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

/* ================================
   Spacing Utilities
   ================================ */

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

/* ================================
   Responsive Behavior
   ================================ */

@media (max-width: 768px) {
  section {
    padding-block: var(--space-xl);
  }

  .container,
  .section-inner {
    padding-inline: var(--space-sm);
  }

  .grid,
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .grid {
    gap: var(--space-md);
  }
}

/* ================================
   Accessibility
   ================================ */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ================================
   Section Content Rhythm
=============================== */

section > .container > * + *,
section > .section-inner > * + * {
  margin-top: var(--content-gap, var(--space-md));
}

/* Long-form readability */

section p {
  line-height: var(--lh-relaxed, 1.7);
}

/* ================================
   Global Content Rhythm
   ================================ */

.flow > * + * {
  margin-top: var(--space-md);
}