:root {
  --overlay-font-size: clamp(0.6em, 1.1vw, 1.8em);
}

.overlay-container {
  position: relative;
  display: inline-block;
  width: 100%;
}

.overlay-text {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  text-align: center;
  font-size: var(--overlay-font-size);
  font-weight: bold;
  color: white;
  text-shadow: 2px 2px 4px black;
}