$(document).ready(function () {
  $(".menubtn").click(function () {
    $(".side-nav").css("left","0");
    $("body,.header,#coverey").css("left","60%")
    
    
  
    $("#coverey").css("visibility","visible");
    $("body").css("overflow-x","hidden");
  });

  $("#coverey").click(function () {
    $(".side-nav").css("left","-100%");
     $("body,.header,#coverey").css("left","0")
    
  
    $("#coverey").css("visibility","hidden");
  });
});