<div id="page">

    <!--상단 메뉴 영역-->
    <nav class="gtco-nav">
        <div class="container">
        </div>
    </nav>


    <!-- Content 전용섹션 --> 
    <div class="gtco-content"> 
    </div> 


    <!--하단 copyright 영역--> 
    <footer id="gtco-footer"> 
        <div class="container"> 
        </div> 
    </footer> 

</div> 

<style type="text/css">
    #page {
        display: flex;
        flex-direction: column;
        min-height: 100vh;
    }

    #page > div:not(nav):not(footer) {
        flex: 1;
    }

    #gtco-footer {
        margin-top: auto;
    }
</style>