body {
    min-height: 100vh;
    background-color: #000000;
    margin: 0 auto;
}

nav{
    margin: 20px 100px;
}

.upper{
    text-align: center;
}

.upper img{
    vertical-align: middle;
}

img{
    vertical-align: bottom;
}

.contents{
    margin-top: 5%;
    margin-bottom: 6%;
    text-align: center;
}

footer{
    text-align: center;
    margin-top: 20px;
}

footer p{
    color: #ffffff;
    font-size: 10pt;
    font-family: "Noto Sans KR", serif;
    margin-top: 0;
    margin-bottom: 30px;
}

footer img{
    margin: 10px;
    vertical-align: middle;
}