/* Page scaffolding: shells, section rhythm, scroll reveal. */

.shell {
  width: min(100% - 3rem, var(--max));
  margin-inline: auto;
}

.section {
  position: relative;
  padding: var(--section-pad-y) 0;
  /* Skip layout and paint for sections far off screen. */
  content-visibility: auto;
  contain-intrinsic-size: auto 700px;
}

.section + .section {
  border-top: 1px solid var(--divider);
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 900ms var(--ease-out), transform 900ms var(--ease-out);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}