/* ============================================================
   LAYOUT — Pack2Door
   Container, grid system, section spacing
   ============================================================ */

/* ── Container ───────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.container-sm {
  max-width: 768px;
}

.container-md {
  max-width: 1024px;
}

.container-xl {
  max-width: 1400px;
}

/* ── Section Spacing ─────────────────────────────────────── */
.section {
  padding-top: var(--space-28);
  padding-bottom: var(--space-28);
}

.section-sm {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.section-lg {
  padding-top: var(--space-32);
  padding-bottom: var(--space-32);
}

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

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

/* ── Grid System (12-column) ─────────────────────────────── */
.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); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }

.grid-auto-fill {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }
.col-span-4 { grid-column: span 4; }
.col-span-6 { grid-column: span 6; }
.col-span-8 { grid-column: span 8; }
.col-span-full { grid-column: 1 / -1; }

/* ── Flex Utilities ──────────────────────────────────────── */
.flex        { display: flex; }
.flex-col    { flex-direction: column; }
.flex-wrap   { flex-wrap: wrap; }
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end   { align-items: flex-end; }
.justify-start  { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end    { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.flex-1      { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }

/* ── Gap Utilities ───────────────────────────────────────── */
.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); }
.gap-10 { gap: var(--space-10); }
.gap-12 { gap: var(--space-12); }
.gap-16 { gap: var(--space-16); }

/* ── Section Header ──────────────────────────────────────── */
.section-header {
  max-width: 600px;
  margin-bottom: var(--space-16);
}

.section-header.centered {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-header h2 {
  margin-top: var(--space-3);
  margin-bottom: var(--space-4);
}

.section-header p {
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

/* ── Split Layout (50/50) ────────────────────────────────── */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.split-layout.reverse {
  direction: rtl;
}

.split-layout.reverse > * {
  direction: ltr;
}

/* ── Responsive Overrides ────────────────────────────────── */
@media (max-width: 1024px) {
  .section {
    padding-top: var(--space-20);
    padding-bottom: var(--space-20);
  }

  .split-layout {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

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

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

@media (max-width: 768px) {
  .container {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

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

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

  .section-header {
    margin-bottom: var(--space-10);
  }
}

@media (max-width: 640px) {
  :root {
    --section-py: var(--space-16);
  }
}