video { 
    position: fixed;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    z-index: -100;
    -webkit-transform: translateX(-50%) translateY(-50%);
            transform: translateX(-50%) translateY(-50%);
 background: url('') no-repeat;
  background-size: cover;
  -webkit-transition: 1s opacity;
  transition: 1s opacity;
}
.stopfade { 
   opacity: .5;
}

#polina { 
  font-family: Agenda-Light, Agenda Light, Agenda, Arial Narrow, sans-serif;
  font-weight:100; 
  background: rgba(0,0,0,0.76);
  color: white;
  padding: 2rem;
  width: 100%;
  text-align: center;
  float: right;
}

#polina button { 
  display: block;
  width: 80%;
  padding: .4rem;
  border: none; 
  margin: 1rem auto; 
  background: rgba(255,255,255,0.23);
  color: #fff;
  border-radius: 3px; 
  cursor: pointer;
  -webkit-transition: .3s background;
  transition: .3s background;
}
#polina button:hover { 
   background: rgba(0,0,0,0.5);
}


@media screen and (max-width: 500px) { 
  div{width:;} 
	
	.pro-set-left {
	margin: 0;
	text-align: left;
	}
#pro1, #page-top {
    background-color: #d7d7d6;
	height: 900px;	
	}
#light-bulb3, #light-bulb4 {
    background:none;		
}
.cube-switch1,.nextbtn,#pro2, .cube-switch3, #pro3
	{ display: none;}
	
	.setcon{list-style: none; margin-top: 60px; margin-left: 136px;}
	
}
		
@media screen and (max-device-width: 800px) {
  html { background: url( ../../img/bg.jpg) no-repeat center center fixed; }
  #bgvid { display: none; }
.pro-set-left {
    margin: 36px 0 0 2%;
	text-align: left;}
.setcon{list-style: none;  margin-left: 136px; height: 1px;}	
	
	}