.hero-single-event {
  background: url('assets/images/hero/eventos.jpg') center/cover no-repeat;
  height: 440px;
  position: relative;
}

.hero-single-event .overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.55);
}