/* ==========================================================================
   Layout — container, section rhythm, grid helpers
   ========================================================================== */

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

.section {
  padding-block: var(--space-3xl);
}

.section--tight {
  padding-block: var(--space-2xl);
}

.section--gray {
  background: var(--color-gray-50);
}

.section-head {
  max-width: 46rem;
  margin-bottom: var(--space-xl);
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.section-head p {
  color: var(--color-muted);
  font-size: var(--text-md);
  margin-top: var(--space-sm);
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

.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: 900px) {
  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

  .section {
    padding-block: var(--space-2xl);
  }

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

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-2xl);
  align-items: start;
}

@media (max-width: 900px) {
  .split {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
}

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

.stack > * + * {
  margin-top: var(--space-sm);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}