.u-visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.u-flow > * + * {
  margin-top: 1rem;
}

.u-center {
  text-align: center;
}

.u-text-muted {
  color: var(--gd-muted);
}

.u-max-reading {
  max-width: var(--gd-reading);
}