.overlay-dark {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6); /* last value = opacity */
  z-index: 0;
}

/* keep the link as the only clickable thing */
.rv-button > * { pointer-events: none; }

.hero-subtext {
  margin-top: 24px;
  max-width: 720px;
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  line-height: 1.7;
  color: #4b4b4b;
  letter-spacing: 0.02em;
}

.smaller-heading {
  font-size: 0.65em;
  letter-spacing: -0.01em;
  margin-top: .1em;
}