.hero {
  position: relative;
}

.hero img {
  width: 100%;
  height: auto;
}

.cta {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: blue;
  color: white;
  padding: 10px;
}

main {
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  main {
    grid-template-columns: 1fr 1fr;
  }

  .hero {
    grid-column: span 2;
  }
}