header {
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  /*font-size: 18px;*/
  height: 100vh;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  text-align: center;
  -webkit-transform-style: preserve-3d;
  transform-style: preserve-3d;
  -webkit-perspective: 100px;
  perspective: 100px;
}
header h1 {
  font-size: 3rem;
  line-height: 4.5rem;
}
@media (max-width: 576px) {
  header:before {
    -webkit-animation: fade-slide-down 3s 1s cubic-bezier(0, 0.5, 0, 1) forwards;
    animation: fade-slide-down 3s 1s cubic-bezier(0, 0.5, 0, 1) forwards;
    background: -webkit-linear-gradient(top, rgba(0, 0, 0, .1), rgba(0, 0, 0, .4)), url(../images/hero_klein.jpg) no-repeat bottom;
    background: linear-gradient(to bottom, rgba(0, 0, 0, .1), rgba(0, 0, 0, .2)), url(../images/hero_klein.jpg) no-repeat bottom;
    background-size: cover;
    bottom: 0;
    content: "";
    left: 0;
    opacity: 0;
    position: absolute;
    right: 0;
    top: 0;
    z-index: -1;
  	}
}
@media (min-width: 577px) {
  header:before {
    -webkit-animation: fade-slide-down 3s 1s cubic-bezier(0, 0.5, 0, 1) forwards;
    animation: fade-slide-down 3s 1s cubic-bezier(0, 0.5, 0, 1) forwards;
    background: -webkit-linear-gradient(top, rgba(0, 0, 0, .1), rgba(0, 0, 0, .4)), url(../images/hero.jpg) no-repeat bottom;
    background: linear-gradient(to bottom, rgba(0, 0, 0, .1), rgba(0, 0, 0, .2)), url(../images/hero.jpg) no-repeat bottom;
    background-size: cover;
    bottom: 0;
    content: "";
    left: 0;
    opacity: 0;
    position: absolute;
    right: 0;
    top: 0;
    z-index: -1;
  	}
}
/*
  header:after {
    background: #F9FCFF;
    content: "";
    height: 40rem;
    left: -5%;
    position: absolute;
    right: -5%;
    top: 90%;
    -webkit-transform: rotateZ(-3deg);
    transform: rotateZ(-3deg);
    -webkit-transform-origin: 0 0;
    transform-origin: 0 0;
    z-index: 0;
  }
*/
  .header-title, .header-subtitle {
    color: #fff;
  }
  .header-subtitle {
    margin-bottom: 5rem;
  }
  .animate-pop-in {
    animation: pop-in 1s 1s ease-out forwards;
    opacity: 0;
  }
  /* Animations */
  @-webkit-keyframes fade-slide-down {
    0% {
      opacity: 0;
      -webkit-transform: translateY(-4rem);
      transform: translateY(-4rem);
    }
    100% {
      opacity: 1;
      -webkit-transform: none;
      transform: none;
    }
  }
  @keyframes fade-slide-down {
    0% {
      opacity: 0;
      -webkit-transform: translateY(-4rem);
      transform: translateY(-4rem);
    }
    100% {
      opacity: 1;
      -webkit-transform: none;
      transform: none;
    }
  }
  @keyframes pop-in {
    0% {
      opacity: 0;
      transform: translateY(-4rem) scale(.8);
    }
    100% {
      opacity: 1;
      transform: none;
    }
  }