.page {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  padding: var(--space-page-y) var(--space-page-x) 32px;
  overflow: hidden;
}

/*
 * Full-page background art.
 * Mobile: sm (default). Tablet: md (720px+). Desktop: lg (1100px+).
 */
.page-bg {
  position: fixed;
  inset: 0;
  z-index: var(--z-art);
  pointer-events: none;
  background-image: var(--art-bg-sm);
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
}

.masthead,
.content,
.colophon {
  position: relative;
  z-index: var(--z-content);
  width: 100%;
  max-width: 100%;
  min-width: 0;
}

.masthead {
  display: flex;
  justify-content: center;
}

.content {
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  max-width: 40rem;
  margin-inline: auto;
  padding: 36px 0 28px;
  text-align: center;
}

.content > * {
  min-width: 0;
}

.colophon {
  display: flex;
  justify-content: center;
  padding-top: 12px;
}

@media (min-width: 720px) {
  .page {
    --space-page-x: 40px;
    --space-page-y: 38px;
  }

  .page-bg {
    background-image: var(--art-bg-md);
  }

  .masthead {
    justify-content: flex-end;
  }
}

@media (min-width: 1100px) {
  .page-bg {
    background-image: var(--art-bg-lg);
  }

  .content {
    padding-bottom: 6vh;
  }
}