<body>
    <div id="wrap">
        <div id="header"></div>
        <div id="nav"></div>
        <div id="aside"></div>
        <div id="section"></div>
        <div id="footer"></div>
    </div>
    
</body>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>레이아웃 유형01</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        body {
            background-color: #FFF3E0;
        }
        #wrap {
            width: 1200px;
            margin: 0 auto;
        }
        #header {
            width: 100%;
            height: 100px;
            background-color: #FFE0B2;
        }
        #nav {
            width: 100%;
            height: 100px;
            background-color: #FFCC80;
        }
        #aside {
            width: 30%;
            height: 780px;
            background-color: #FFB74D;
            float: left;
        }
        #section {
            width: 70%;
            height: 780px;
            background-color: #FFA726;
            float: left;
        }
        #footer {
            width: 100%;
            height: 100px;
            background-color: #FF9800;
            clear: both; 
        }

        /*  미디어쿼리 */
        @media (max-width :1300px) { /* 1200에서 스크롤이 잠깐 생겨서 여분을 두기 */
            #wrap {
                 width: 96%; 
            }
        }
        @media (max-width :768px) { 
            #wrap {
                 width: 100%; 
            }
        }
        @media (max-width :480px) { 
            /* #wrap {
                 width: 100%; 위에서 0-768 이라 값이 똑같아서 넣을 필요가 없음
            } */

            #aside {
                width: 100%;
                height: 300px;

            }
            #section {
                width: 100%;
                height: 480px;
            }
        }

    </style>
</head>

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External JavaScript

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