footer,
header{
  margin: 0;
  padding: 0;
  width: 100%;
  min-height: 50px;
  text-align: center;
  font-family: 'PT Sans','Roboto',Tahoma;
}
footer p{
  color: #aaa;
  text-shadow: 2px 2px 25px #0f0;
}
header p span{
  color: #eee;
  font-family: cursive, fantastic, arial;
  font-size: 1.8em;
  text-shadow: 0px 1px 0 #000, 5px 5px 20px green;
}
header p{
  color: #000;
  text-shadow: 0 2px 1px white, 2px 2px 15px;
  font-size: 1.5em;
}
a {
  text-transform: uppercase;
  text-decoration: none;
  font-weight: bold;
}
body{
  margin: 0;
  padding: 0;
  background-color: #222;
  background-image: url('https://img3.goodfon.ru/original/1600x1200/1/bc/alienage-algae-green.jpg');
}
#wrapper{
/*   position: absolute; */
  display: block;
  -webkit-perspective: 900px;
  -moz-perspective: 900px;
  -ms-perspective: 900px;
  perspective: 900px;
  width: 90%;
  height: 90%;
  margin: 5px auto;
  background-color: rgba(0,70,25,0.3);
}
#cube{
  position: relative;
  width: 300px;
  height: 300px;
  margin: 10% auto;
  -webkit-transform-origin: 50% 50% -150px;
  -moz-transform-origin: 50% 50% -150px;
  -ms-transform-origin: 50% 50% -150px;
  -o-transform-origin: 50% 50% -150px;
  transform-origin: 50% 50% -150px;
  -webkit-transform-style: preserve-3d;
  -moz-transform-style: preserve-3d;
  -ms-transform-style: preserve-3d;
  transform-style: preserve-3d;
  
/*   -webkit-transform: rotate3d(1,1,1,50deg);
  -moz-transform: rotate3d(1,1,1,50deg);
  -ms-transform: rotate3d(1,1,1,50deg);
  -o-transform: rotate3d(1,1,1,50deg); 
   transform: rotate3d(1,1,1,-20deg); */

}
.side{
  box-sizing: border-box;
  position: absolute;
/*   position: relative; */
  padding: 10px;
  margin: 10px;
  
  width: 300px;
  height: 300px;
  background-color: rgba(0,56,140,0.3);
  
  line-height: 300px;
  font-family: cursive;
  font-size: 5em;
  color: #fff;
  text-shadow: 1px 1px 0 #000;
  text-align: center;
  border: 10px solid #ddd;
  -webkit-transform-origin: 50% 50% -150px;
  -moz-transform-origin: 50% 50% -150px;
  -ms-transform-origin: 50% 50% -150px;
  -o-transform-origin: 50% 50% -150px;
  transform-origin: 50% 50% -150px;
}
#side1{
  /*   0deg */
}
#side2{
  -webkit-transform: rotateY(90deg);
  -moz-transform: rotateY(90deg);
  -ms-transform: rotateY(90deg);
  -o-transform: rotateY(90deg);
  transform: rotateY(90deg);
}
#side3{
  -webkit-transform: rotateY(-90deg);
  -moz-transform: rotateY(-90deg);
  -ms-transform: rotateY(-90deg);
  -o-transform: rotateY(-90deg);
  transform: rotateY(-90deg);
}
#side4{
  -webkit-transform: rotateY(180deg);
  -moz-transform: rotateY(180deg);
  -ms-transform: rotateY(180deg);
  -o-transform: rotateY(180deg);
  transform: rotateY(180deg);
}
#side5{
  -webkit-transform: rotateX(-90deg);
  -moz-transform: rotateX(-90deg);
  -ms-transform: rotateX(-90deg);
  -o-transform: rotateX(-90deg);
  transform: rotateX(-90deg);
}
#side6{
  -webkit-transform: rotateX(90deg);
  -moz-transform: rotateX(90deg);
  -ms-transform: rotateX(90deg);
  -o-transform: rotateX(90deg);
  transform: rotateX(90deg);
}