header {
  position: relative;
  background-color: #333;
  height: 420px;
  min-height: 25rem;
  margin-bottom: 60px;
  width: 100%;
  overflow: hidden;
}



header .container {
  position: relative;
  z-index: 1;
}


@media (max-width: 768px) {
  .navbar-style {
    z-index: 2;
  }
}