Overleaf/services/web/frontend/stylesheets/bootstrap-5/base/layout.scss

$header-height: 68px;
$footer-height: 50px;

.content {
  min-height: 100vh;
  padding-top: $header-height + $spacing-08;
  padding-bottom: $spacing-08;
}

.content-alt {
  background-color: $bg-light-secondary;
}

// Page header/separator
.page-separator,
.page-header {
  padding-bottom: $spacing-05;
  border-bottom: 1px solid $border-divider;
  margin: 0;

  // Apply margin above or below this header/separator only when it has a sibling
  * > * + &,
  * > & + * {
    margin-top: $spacing-08;
  }
}

// Horizontal rule. Override Bootstrap's 25% opacity, which we don't want
hr {
  opacity: unset;
}

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