.area {
		  width: 500px;
		  margin: auto;
		  flex-wrap: wrap;
		  display: flex;
		}
		 
		.tab_class {
		  width: calc(100%/5);
		  height: 50px;
		  background-color: darkgrey;
		  line-height: 50px;
		  font-size: 15px;
		  text-align: center;
		  display: block;
		  float: left;
		  order: -1;
		}
		 
		input[name="tab_name"] {
		  display: none;
		}
		 
		input:checked + .tab_class {
		  background-color: cadetblue;
		  color: aliceblue;
		}
		 
		.content_class {
		  display: none;
		  width: 100%;
		}
		 
		input:checked + .tab_class {
		  display: block;
		}