/* ============================================================
   CALVION TECHNOLOGIES
   layout.css — Container, Grid & Section Spacing
   ============================================================ */

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

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

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

/* ── Section Base ── */
.section {
  padding-top: var(--section-padding-y);
  padding-bottom: var(--section-padding-y);
}

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

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

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

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

/* ── Grid System ── */
.grid {
  display: grid;
  gap: var(--space-8);
}

.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--6 { grid-template-columns: repeat(6, 1fr); }

/* Tech cards: 3 col → 2 → 1 */
.grid--tech {
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--color-border);
}

/* Split layout */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-20);
  align-items: center;
}

.split--reversed .split__content {
  order: 2;
}

.split--reversed .split__media {
  order: 1;
}

/* ── Flex Utilities ── */
.flex { display: flex; }
.flex--center { align-items: center; justify-content: center; }
.flex--between { align-items: center; justify-content: space-between; }
.flex--gap-sm { gap: var(--space-4); }
.flex--gap-md { gap: var(--space-6); }
.flex--gap-lg { gap: var(--space-8); }

/* ── Responsive Overrides ── */
@media (max-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--tech { grid-template-columns: repeat(2, 1fr); }
  .split { gap: var(--space-12); }
}

@media (max-width: 768px) {
  .section {
    padding-top: var(--section-padding-y-sm);
    padding-bottom: var(--section-padding-y-sm);
  }
  .grid--2,
  .grid--3,
  .grid--4,
  .grid--tech { grid-template-columns: 1fr; }
  .split {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }
  .split--reversed .split__content,
  .split--reversed .split__media {
    order: unset;
  }
}

@media (max-width: 640px) {
  :root {
    --container-px: 1.25rem;
  }
}