button{outline: 0;}
#wrap { position: relative;width: 1920px; height: 1080px; background: #fff;/*outline:1px solid red;*/}
#wrap>div:not(#popup):not(#canvas_layer) {height: 100%; position: relative;}
#wrap>div { display: block; }


#page_std>header {position:relative; width: 1720px; height: 80px;margin:0 auto;opacity: 0;}
#page_std>header>div.top{position: absolute;top:20px;width: 1720px;border-bottom:2px solid #FF9D54}
#page_std>header>div.top>h4{float:left;color: #FF7F21;font-family:"Pretendard";font-weight: 500;font-size:21px;width:500px;height:60px;line-height:60px;}
#page_std>header>div.top>h4 >span{font-family:"Pretendard";font-weight: 500;margin-left:20px;color:#222222;}
#page_std>header>div.top>div{float: right;}
/* #page_std>header>div.top>div button{    
  width:60px; height: 60px; background:url(../img/btn_help.png) center center no-repeat;font-size:0;
} */
#page_std>header>div.top>div button.active{display:none !important;}

.help{display:none;}
/**/
#page_std>section { width: 1720px; height: 998px;margin:0 auto;             }


#page_std>section .con_body{position: relative; height: 996px;margin:0 auto;}

#page_std>section .con_body .con_head{width:100%;height:90px;line-height:35px;margin:0 auto;}

#page_std>section .con_body .con_contents>.content{width:100%;text-align:center;}


#page_std>.std_loading {position: absolute;left:47%;top: 56px;height: 969px;z-index: 101;transform:translate3d(0px, 0px, 0px);display:flex;justify-content: center;align-items: center;}

#loading {
    display: inline-block;
    width: 100px;
    height: 100px;
    border: 10px solid rgba(255,255,255,.5);
    border-radius: 50%;
    border-top-color: #333;
    animation: spin 1s ease-in-out infinite;
    -webkit-animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { -webkit-transform: rotate(360deg); }
}
@-webkit-keyframes spin {
    to { -webkit-transform: rotate(360deg); }
}




/*스마트 수업(학습중)*/
#page_go_std{display:none;position:absolute; top: 15px; left: 1833px; z-index: 1; width:82px; height:76px; background:url(../img/common/ico_stdgo.png) 0 0 no-repeat; z-index: 5;}
#page_go_std.go{display:block;}
#page_go_std>button{font-size:0; width:100%; height:100%;}

#ebook_pages{position: relative; left: 50%; margin-left: -801px; top: 10px; width: 1602px; height: 1043px; z-index: 1; /* display: none; */ touch-action: none; }