<div id="wrap">
    <header id="header">
        <div class="container">
            <div class="header"></div>
        </div>
    </header>
    <nav id="nav">
        <div class="container">
            <div class="nav"></div>
        </div>
    </nav>
    <main id="main">
        <section class="contents container">
            <div class="left">
                <article class="cont1"></article>
            </div>
            <div class="right">
                <article class="cont2"></article>
                <article class="cont3"></article>
                <article class="cont4"></article>
            </div>
        </section>
    </main>
    <footer id="footer">
        <div class="container">
            <div class="footer"></div>
        </div>
    </footer>
</div>

*{
    box-sizing: 0;
    padding: 0;
    margin: 0;
}
#header {
    background-color: #EEEBE9;
}
#nav {
    background-color: #B9AAA5;
}
#main {
    background-color: #886F65;
}
#footer {
    background-color: #4E342E;
}
.container {
    width: 1200px;
    height: inherit; 
    margin: 0 auto; 
}
.header {
    width: 100%;
    height: 100px;
    background-color: #D5CCC9;
}
.nav {
    width: 100%;
    height: 100px;
    background-color: #9D8980;
}
.footer {
    width: 100%;
    height: 100px;
    background-color: #3E2723;
}
.contents {
    width: 1200px;
    display: flex;
    flex-wrap: wrap;
}
.contents .left {
    width: 100%;
}
.contents .right {
    display: flex;
    flex-wrap: wrap; 
    width: 100%;
}
.contents .left .cont1 {
    width: 100%;
    height: 100px;
    background-color: #684D43;
}

.contents .right .cont2 {
    width: 100%;
    height: 200px;
    background-color: #74574A;
}

.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 .left {
        width: 30%;
    }
    .contents .right {
        width: 70%;
    }
    .contents .left .cont1 {
        height: 780px;
    }
    .contents .right .cont2 {
        height: 390px;
    }
    .contents .right .cont3,
    .contents .right .cont4 {
        height: 390px;
    }
 }

 @media (max-width: 768px) {
    .container {
        width: 100%;
    }
    .contents .right .cont2,
    .contents .right .cont3,
    .contents .right .cont4 {
        width: 100%;
        height: 260px;
    }
 }

 @media (max-width: 480px) {
    .contents .left {
        width: 100%;
    }
    .contents .right {
        width: 100%;
    }
    .contents .left .cont1 {
        height: 150px;
    }
    .contents .right .cont2,
    .contents .right .cont3,
    .contents .right .cont4 {
        height: 210px;
    }
 }