.tab{overflow:hidden;border:1px solid #ccc;background-color:#f1f1f1}.tab button{background-color:inherit;float:left;border:none;outline:none;cursor:pointer;padding:3px;transition:.3s}.tab button:hover{background-color:#ddd}.tab button.active{background-color:#ccc}.tabcontent{display:none;padding:2px}