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

.container--narrow {
  max-width: calc(var(--container-narrow) + var(--space-lg) * 2);
}

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

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

.section--dark h2,
.section--dark h3 {
  color: var(--color-white);
}

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

/* Section heading with short rule beneath, as in the reference */
.section-title {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-title::after {
  content: "";
  display: block;
  width: 3rem;
  height: 3px;
  margin: var(--space-md) auto 0;
  background-color: var(--color-accent);
  border-radius: 2px;
}

/* Short intro paragraph directly under a section title */
.section-intro {
  max-width: 40rem;
  margin: calc(var(--space-lg) * -1) auto var(--space-2xl);
  text-align: center;
  font-size: var(--text-md);
  color: var(--color-grey-500);
}

.section--dark .section-intro {
  color: rgba(255, 255, 255, 0.8);
}

/* Two-column media/text split */
.split {
  display: grid;
  gap: var(--space-xl);
  align-items: center;
}

.split + .split {
  margin-top: var(--space-xl);
}

.split__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.split__body {
  text-align: center;
}

.split__body > * + * {
  margin-top: var(--space-md);
}

.split__body--left {
  text-align: left;
}

.split__body--left .check-list,
.split__body--left .notice {
  margin-top: var(--space-lg);
}

@media (min-width: 48rem) {
  .section {
    padding-block: var(--space-4xl);
  }

  .split {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
  }

  .split + .split {
    margin-top: var(--space-2xl);
  }

  .split--reverse .split__media {
    order: 2;
  }

  .split__media img {
    aspect-ratio: 3 / 2;
  }
}