.overlay {
  z-index: 2000;
  background: #DEDEDE;
  color: #888;
  position: fixed;
  top: 0;
  left: 0;
  display: block;
  place-items: center;
  text-align: center;
  right: 0;
  bottom: 0;
  font: 0.9rem/1.4 sans-serif;
}

.x-large {
  font-size: xx-large;
}

.loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
}

.subtitle {
  position: absolute;
  left: 50%;
  top: 3em;
  font: 1em sans-serif;
  background: var(--bs-yellow);
  padding: .3rem .5rem;
  border-radius: .3rem;
  box-shadow: 0 0 3px rgba(0,0,0,0.5);
  font-weight: bold;
  margin-left: 28%;
}

@media (min-width: 576px) {
  .subtitle {
    font: 1.5em sans-serif;
    font-weight: bold;
    top: 1.8em;
  }
}

.clock {
  font-size: xx-large;
}