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

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

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

.section {
  padding-block: var(--space-xl);
  position: relative;
}

.section--dark {
  background-color: var(--color-charcoal);
  color: var(--color-cream);
}

.section--cream {
  background-color: var(--color-cream);
  color: var(--color-charcoal);
}

/* Grid utilities */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

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

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

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

/* Sticky left pattern */
.split-sticky {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .split-sticky {
    grid-template-columns: 1fr 1.5fr;
  }

  .split-sticky__left {
    position: sticky;
    top: calc(var(--header-height) + var(--space-lg));
    align-self: start;
  }
}

/* Separator line */
.separator {
  width: 100%;
  height: 1px;
  background-color: var(--color-border);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-slow) var(--ease-premium);
}

.separator.visible {
  transform: scaleX(1);
}

/* Wave transition */
.wave-container {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 25vh;
  overflow: hidden;
  z-index: 2;
}

.wave-curve {
  position: absolute;
  top: 0;
  left: 50%;
  width: 120%;
  height: 200%;
  background: var(--color-cream);
  border-radius: 50% 50% 0 0;
  transform: translateX(-50%);
}

/* Dark wave (for transitions to dark sections) */
.wave-container--dark .wave-curve {
  background: var(--color-charcoal);
}

/* Top curve for footer */
.curve-top {
  border-radius: 5rem 5rem 0 0;
  overflow: hidden;
}