.hero {
  background-color: var(--secondary-color);
  height: 36.875em;
}

.hero .bg-image {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.hero .bg-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero .overlay {
    height: 100%; 
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}
.hero .captions { 
  max-width: var(--hero-captions-width);
  height: 100%;
}
.hero .hero-content {
  color: var(--main-color);
}
.hero .hero-subtitle { 
  margin-top: 1em; 
  font-size: 2.25rem;
  font-weight: 400;
  line-height: 120%;
}
.hero .hero-subtitle sup {
  position: relative;
  top: .25em;
  font-size: .65em;
}

@media all and (max-width: 33em) {
  .hero h1 { font-size: 2.5rem; }
  .hero .hero-subtitle { font-size: 1.5rem; line-height: 100%; }
  .hero .captions { text-align: center; margin-top: 2.5rem; }
}