custom.css

.hero-section {
  background: linear-gradient(
  rgba(0, 0, 0, 0.3),
  rgba(0, 0, 0, 0.2)
  ), url('/images/cat.jpg') 50% no-repeat;
  background-size: cover;
  height: 80vh;
  text-align: center;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
}
.hero-section .hero-section-text {
  color: #fefefe;
  text-shadow: 1px 1px 2px #0a0a0a;
}