* {
    font-family: 'Malgun Gothic', '맑은 고딕', 'Consolas', sans-serif;
    font-size: 1.0em;
}

#page_left_area {
    position: fixed;
    top: 60px;
    left: 0;
    width: 200px;
    height: calc(100vh - 60px);
    background-color: #ecf0f1;
    padding: 10px;
    box-sizing: border-box;
}

#page_top_area {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background-color: #2c3e50;
    color: white;
    line-height: 60px;
    padding-left: 20px;
    box-sizing: border-box;
}

#page_top_area div { float:left; margin-left:10px; }

/* 본문 영역 */
#page_content_area {
    margin-top: 60px;
    margin-left: 200px;
    padding: 20px;
}