body{
    display: grid;
    grid-row: span;
    grid: 
    "header header header"
    "main main main"
    "footer footer footer";
    grid-template-columns:250px auto 20%;
    column-gap: 10px;

    font-family: 'Gowun Dodum', sans-serif;
    background-color: #EAEDF8;
    margin: 0;
}

header{grid-area: header;}
nav{grid-area: nav;}
main{grid-area: main;}
aside{grid-area: aside;}
footer{grid-area: footer;}

footer{
	position: fixed;
	bottom: 0px;
    padding: 15px;
    text-align: center;
    background-color: #343434;
    color: white;
    margin-top: 20px;
    width: 100%;
}

header{
    background-color: white;
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    height: 80px;
    box-shadow: 2px 2px 2px rgba(0, 0, 0, 0.1);
    padding-left: 50px;
    display: flex;
    justify-content: space-between;
}

main{
    margin-top: 75px;
    margin-left: 280px;
    margin-bottom: 110px;
    margin-right: 280px;
}

aside{
    position: fixed;
    right: 0;
    top: 0;
    padding-top: 125px;
    padding-left: 20px;
    padding-right: 40px;
    height: 80vh;
    border-left: 4px;
    border-color: white;
    border-style: dotted;
}

@media screen and (max-width:768px){
    body{
        grid: 
    "header"
    "nav"
    "main"
    "aside"
    "footer";
    }
}