/* ============================================
   Layout System
   ============================================ */

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-4);
}
.container-sm { max-width: var(--container-sm); }
.container-md { max-width: var(--container-md); }
.container-lg { max-width: var(--container-lg); }

/* ── Page wrapper ── */
.page {
  min-height: 100vh;
  padding-top: var(--nav-height);
}
.page-content {
  padding: var(--space-6) 0;
}

@media (max-width: 640px) {
  .page {
    padding-bottom: var(--bottom-nav-height);
  }
  .page-content {
    padding: var(--space-4) 0;
  }
}

/* ── Section ── */
.section {
  padding: var(--space-16) 0;
}
.section-sm {
  padding: var(--space-8) 0;
}

@media (max-width: 640px) {
  .section { padding: var(--space-10) 0; }
  .section-sm { padding: var(--space-6) 0; }
}

/* ── Grid ── */
.grid {
  display: grid;
  gap: var(--space-6);
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid { gap: var(--space-4); }
}

/* ── Flex helpers ── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-start { display: flex; align-items: center; justify-content: flex-start; }
.flex-end { display: flex; align-items: flex-end; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.flex-1 { flex: 1; }

/* ── Responsive show/hide ── */
.hide-mobile { display: block; }
.show-mobile { display: none; }
.hide-desktop { display: none; }

@media (max-width: 640px) {
  .hide-mobile { display: none !important; }
  .show-mobile { display: block !important; }
}
@media (min-width: 1025px) {
  .hide-desktop { display: none !important; }
}

/* ── Two-column layout (sidebar + content) ── */
.layout-sidebar {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
}
@media (max-width: 1024px) {
  .layout-sidebar {
    grid-template-columns: 1fr;
  }
}

/* ── Sticky footer pattern ── */
.layout-sticky-footer {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.layout-sticky-footer > main { flex: 1; }