.content-container {
  position: relative;
  border-radius: var(--text-boxes-radius);
  border: var(--text-boxes-border-width) solid rgba(var(--color-foreground), var(--text-boxes-border-opacity));
}

.content-container--full-width {
  border-radius: 0;
  border-left: none;
  border-right: none;
}

.content-container:after {
  content: '';
  position: absolute;
  top: calc(var(--text-boxes-border-width) * -1);
  right: calc(var(--text-boxes-border-width) * -1);
  bottom: calc(var(--text-boxes-border-width) * -1);
  left: calc(var(--text-boxes-border-width) * -1);
  border-radius: var(--text-boxes-radius);
  box-shadow: var(--text-boxes-shadow-horizontal-offset) var(--text-boxes-shadow-vertical-offset) var(--text-boxes-shadow-blur-radius) rgba(var(--color-shadow), var(--text-boxes-shadow-opacity));
  z-index: -1;
}