.headerImage {
  background: linear-gradient(rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.8)), url(../images/header-background.jpg) no-repeat center center;
  background-size: cover;
}

.joinSectionImage {
  background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url(../images/invitation-background.jpg) no-repeat center center;
  background-size: cover;
}