.gray-bg{ 
    background: url(../img/basebg.jpg) no-repeat center center fixed; 
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}
.loginscreen {
    padding: 27px;
    border-radius:15px;
    background-color:rgba(255, 255, 255, 0.8);
    position: absolute;
    top: calc(50% - 322px);
    left: calc(50% - 170px);
    
}
#IsoLogo {
    width: 100%;
}

#myVideo {
    position: fixed;
    right: 0;
    bottom: 0;
    min-width: 100%; 
    min-height: 100%;
  }

  #myBtn {
    position: fixed;
    bottom: 0;
    right: 0;
    width: 200px;
    font-size: 18px;
    padding: 10px;
    border: none;
    background: #000;
    color: #fff;
    cursor: pointer;
    
    

  }
  
  #myBtn:hover {
    background: #ddd;
    color: black;
  }