.hero {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  height: 100vh;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  background-color: #000;
}

.logo-white {
  width: 150px;
  height: 150px;
}

.opener {
  position: fixed;
  left: 0%;
  top: 0%;
  right: 0%;
  bottom: 0%;
}