body, html {
  padding: 0;
  margin: 0;
font-family: 'Neucha', cursive;
}

#particles-js {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

#page-wrapper {
  position: relative;
  z-index: 2;
  background-color: white;
  width: 400px;
  margin: auto;
  padding: 25px;
  min-height: 3000px;
  border-left: 1px solid #333;
  border-right: 1px solid #333;
}

.parent {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    overflow: auto;
}

.block {
    z-index: 2;
    width: 250px;
    height: 250px;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    margin: auto;
    -moz-user-select: none;
  -khtml-user-select: none;
  -webkit-user-select: none;
  user-select: none;
    
    img {
        max-width: 100%;
        height: auto;
        display: block;
        margin: 0 auto;
        border: none;
    }
}

a.sprite1 {
	display: inline-block;
	width:40px;
	height:40px;
	background:url("/media/img/3.png");
	background-position:0px 0px;
	margin:0px;
}
a.sprite1:hover {
	background-position:0 -40px;
	color: #fff /* цвет беленький */
}

a.sprite2 {
	display: inline-block;
	width:40px;
	height:40px;
	background:url("/media/img/3.png");
	background-position:-40px 0px;
	margin:0px;
}
a.sprite2:hover {
	background-position:-40px -40px;
	color: #fff
}

a.sprite3 {
	display: inline-block;
	width:40px;
	height:40px;
	background:url("/media/img/3.png");
	background-position:-80px 0px;
	margin:0px;
}
a.sprite3:hover {
	background-position:-80px -40px;
	color: #fff
}

a.sprite4 {
	display: inline-block;
	width:40px;
	height:40px;
	background:url("/media/img/3.png");
	background-position:-120px 0px;
	margin:0px;
}
a.sprite4:hover {
	background-position:-120px -40px;
	color: #fff
}

a.sprite5 {
	display: inline-block;
	width:40px;
	height:40px;
	background:url("/media/img/3.png");
	background-position:-160px 0px;
	margin:0px;
}
a.sprite5:hover {
	background-position:-160px -40px;
	color: #fff
}