/*
 * layout.css — uCommerce Global Layout
 *
 * Includes:
 *   - Container utility
 *   - Section spacing utility
 *   - Global grid helpers
 *   - Responsive layout primitives
 *
 * Depends on: tokens.css, reset.css (must be loaded first)
 * Load order: tokens → reset → layout → components → site
 */


/* -------------------------------------------------------------------------
 * Container
 * ------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding-inline: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-inline: var(--space-8);
  }
}


/* -------------------------------------------------------------------------
 * Section spacing
 * ------------------------------------------------------------------------- */

.section {
  padding-block: var(--space-16);
}

@media (min-width: 768px) {
  .section {
    padding-block: var(--space-24);
  }
}


/* -------------------------------------------------------------------------
 * Two-column grid (collapses to single column on mobile)
 * ------------------------------------------------------------------------- */

.grid-2col {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .grid-2col {
    grid-template-columns: 1fr 1fr;
  }
}


/* -------------------------------------------------------------------------
 * Three-column grid (collapses to single column on mobile)
 * ------------------------------------------------------------------------- */

.grid-3col {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .grid-3col {
    grid-template-columns: 1fr 1fr;
  }
}

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


/* -------------------------------------------------------------------------
 * Stack (vertical flex column)
 * ------------------------------------------------------------------------- */

.stack {
  display: flex;
  flex-direction: column;
}

.stack--sm  { gap: var(--space-2); }
.stack--md  { gap: var(--space-4); }
.stack--lg  { gap: var(--space-8); }


/* -------------------------------------------------------------------------
 * Cluster (horizontal flex wrap)
 * ------------------------------------------------------------------------- */

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.cluster--sm  { gap: var(--space-2); }
.cluster--md  { gap: var(--space-4); }
.cluster--lg  { gap: var(--space-6); }