.tab{overflow:hidden}.tab button{background-color:inherit;border:none;cursor:pointer;float:left;font-size:17px;outline:none;padding:14px 16px;transition:.3s}.tab button:hover{background-color:#ddd}.tab button.active{background-color:#ccc}.tabcontent{border-top:none;display:none;padding:6px 12px}.topright{cursor:pointer;float:right;font-size:28px}