body {
  height: auto;
}
.banner {
  width: 80%;
  margin: 20px 10% 50px 10%;
}

.folder {
  width: 150px;
}

iframe {
	border: none;
	outline: none; 
	height: 100vh;
	width: 100%;
	overflow: hidden;
}

.folder_box {
  display: inline-block;
  text-align: center;
  width: 150px;
  }
  
div.scrollmenu {
  overflow: auto;
  white-space: nowrap;
}

.content {
  min-height: 400px;
  height: 100vh;
}
 
.folder_box a {
  width: 128px;
	height: 128px;
	display: inline-block;
	background-image: url('/images/folder.png');
	background-size: contain;
  background-repeat: no-repeat;
}

.folder_box a.active {
  background-image: url('/images/folder-active.png');
}

span {
  margin-top: 128px;
  display: block;
}