body {
  margin: 0;
  padding: 0;
}
.page_holder {
  text-align: center;
  background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.7)), url(./images/page-bg.jpg) no-repeat 76% 10% / cover;
  position: absolute;
  width: 100%;
  height:100%;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  overflow: auto;
}

.page_holder .logo {
  margin: 50px 0;
}

 .page_holder .logo img {
   max-width: 85%;
 }

.page_holder .under_construction img {
  width: 650px;
  max-width: 100%;  
}