<body>
    <div id="wrap">
        <header id="header">
            <div class="container"></div>
        </header>
        <nav id="nav">
            <div class="container"></div>
        </nav>
        <main id="main">
            <div class="contents container">
                <div class="left">
                    <div class="cont1"></div>
                </div>
                <div class="right">
                    <div class="cont2"></div>
                    <div class="cont3"></div>
                    <div class="cont4"></div>
                </div>
            </div>
        </main>
        <footer id="footer">
            <div class="container"></div>
        </footer>
    </div>
</body>
<style>
        * {
            margin: 0;
        }

        #wrap {}

        #header {
            height: 100px;
            background-color: #eeebe9;
        }

        #nav {
            height: 100px;
            background-color: #b9aaa5;
        }

        #main {
            height: 780px;
            background-color: #886f65;
        }

        #footer {
            height: 100px;
            background-color: #4e342e;
        }

        .container {
            width: 1200px;
            height: inherit;
            background-color: rgba(0, 0, 0, 0.3);
            margin: 0 auto;
        }

        .contents {}

        .contents .left {}

        .contents .left .cont1 {
            width: 100%;
            height: 100px;
            background-color: #74574a;
        }

        .contents .right {
            display: flex;
            flex-wrap: wrap;
        }

        .contents .right .cont2 {
            width: 100%;
            height: 200px;
            background-color: #684d43
        }

        .contents .right .cont3 {
            width: 50%;
            height: 480px;
            background-color: #594139
        }

        .contents .right .cont4 {
            width: 50%;
            height: 480px;
            background-color: #4A352F
        }

        @media (max-width: 1220px) {
            .container {
                width: 96%;
            }

            .contents {
                display: flex;
            }

            .contents .left {
                width: 30%;
            }

            .contents .left .cont1 {
                width: 100%;
                height: 780px;
                background-color: #74574a;
            }

            .contents .right {
                width: 70%;
            }

            .contents .right .cont2 {
                width: 100%;
                height: 390px;
                background-color: #684d43
            }

            .contents .right .cont3 {
                width: 50%;
                height: 390px;
                background-color: #594139
            }

            .contents .right .cont4 {
                width: 50%;
                height: 390px;
                background-color: #4A352F
            }

        }

        @media (max-width: 768px) {
            .container {
                width: 100%;
            }
            .contents .right .cont2 {
                width: 100%;
                height: 260px;
            }

            .contents .right .cont3 {
                width: 100%;
                height: 260px;
            }

            .contents .right .cont4 {
                width: 100%;
                height: 260px;
            }
        }

        @media (max-width: 480px) {
            .contents {
                display: flex;
                flex-wrap: wrap; /*flex 사용시 width값 height값을 알기위한 용도*/
            }
            .contents .left {
                width: 100%;
                height: 150px;
            }
            .contents .left .cont1 {
                height: 150px;
            }
            .contents .right {
                width: 100%;
                height: 630px;
            }
            .contents .right .cont2 {
                height: 210px;
            }
            .contents .right .cont3 {
                height: 210px;
            }
            .contents .right .cont4 {
                height: 210px;
            }
        }

    </style>

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