<body>
    <div id="wrap">
        <div id="header"></div>
        <div id="nav"></div>
        <div id="main">
            <div id="aside"></div>
            <div id="article1"></div>
            <div id="article2">
                <div id="article2-1"></div>
                <div id="article2-2"></div>
            </div>
        </div>
        <div id="footer"></div>
    </div>

    <!-- 
        layout03_01 : float 방식 레이아웃 
        layout03_02 : float 방식 반응형 레이아웃 
        layout03_03 : flex 방식 레이아웃 
        layout03_04 : flex 반응형 방식 레이아웃 
        layout03_05 : grid 방식 레이아웃 
        layout03_06 : grid 방식 반응형 레이아웃 
    -->
</body>
        * {
            margin: 0;
            padding: 0;
        }
        body {
            background-color: #E1F5FE;
        }
        #wrap {
            width: 1200px;
            margin: 0 auto;
        }
        #header {
            height: 100px;
            background-color: #b3e5fc;
        }
        #nav {
            height: 100px;
            background-color: #81D4FA;
        }
        #main {
            display: flex;
            flex-wrap: wrap;
            flex-direction: column;
            height: 780px;
        }
        #aside {
            width: 30%;
            height: 780px;
            background-color: #4FC3F7;
        }
        #article1 {
            width: 70%;
            height: 260px;
            background-color: #29B6F6;
        }
        #article2-1 {
            width: 100%;
            height: 260px;
            background-color: #03A9F4;
        }
        #article2-2 {
            width: 100%;
            height: 260px;
            background-color: #039BE5;
        }
        #footer {
            height: 100px;

            background-color: #0288D1;
        }

        /* 미디어 쿼리 */
        @media (max-width : 1300px){
            #wrap {
                width: 96%;
            }
            #article2 {
                display: flex;
            }
            #article2-1 {
                width: 50%;
                height: 520px;
            }
            #article2-2 {
                width: 50%;
                height: 520px;
            }
        }
        @media (max-width : 768px){
            #wrap {
                width: 100%;
            }
            #article1 {
                width: 100%;
                height: 390px;
            }
            #article2-1 {
                width: 100%;
                height: 390px;
            }
            #article2-2 {
                display: none;
                
            }
        }
        @media (max-width : 480px){
            #aside {
                width: 100%;
                height: 200px;
            }
            #article1 {
                height: 430px;
            }
            #article2-1 {
                height: 150px;
            }
        }

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