@import url('https://fonts.googleapis.com/css2?family=Nanum+Gothic&display=swap');
html {
    height: 100%;
}
body {
    margin: 0;
    padding: 0;
    font-family: "Nanum Gothic", sans-serif;
    height : 100%;
}
.mainheader {
    margin: 0;
    padding: 0 0;
    max-width: 1920px;
    width: 100%;
}
.mainheader img {
    float: left;
    height: 2.5rem;
    padding: 0.25rem;
    width:2.5rem;
    transition : all 1s;
}
.mainheader h2 {
    float: left;
    font-size: 20px;
    line-height: 3rem;
    margin: 0;
    color:white;
}
.linker {
    float:right;
}
.linker ul {
    display: flex;
    list-style: none;
    align-items: center;
    margin-right: 0;

}
.linker a {
    color:white;
    text-decoration: none;
    padding: 0.25rem;
    margin: 0.25rem;
    transition: all 1s;
}
header {
    background-color: #16a198;
    background-size: cover;
    background-position: center;
}
header > #title > h1{
    clear:both;
    text-align: center;
    padding-top: 40px;
    color: white;
    font-size: 3.5em;
    margin:10px 0px 0px 0px;
    @media screen and (max-width: 800px) {
        font-size: 2.2em;
    }
}
header > #account {
    float: right;
    color: white;
    padding-right: 10px;
    width : 230px;
}
header > #account > p {
    text-align: center;
    margin-right: 0px;
}
header > #account > ul {
    clear:both;
    display: flex;
    list-style: none;
    align-items: center;
    margin-right: 0px;
}
header > #account > ul > li {
    margin-right: 10px;
}
header > #account > ul > li > a > button {
    width : 70px;
    height : 30px;
    padding: 5px;
    background-color: #2188a7;
    border-radius: 10px;
    font-family: "Nanum Gothic", sans-serif;
    border : 1px solid #106269;
    font-size : 0.7em;
    color : white;
}
footer {
    height: 10px;
    background-color: #16a198;
    color: white;
    text-align: center;
    padding: 10px;
}
footer > p {
    margin: 0px;
    font-size: 0.7em;
}

#container {
    display: flex;
    flex-direction: column;
    height : 100%;
}
#section-wrapper {
    display: flex;
    flex-grow: 1;
    justify-content: center;
    height : auto;
    background-color: #ddd;
}
#section-wrapper > section {
    width: 100%;
    max-width: 700px;
    height: 100%;
    background-color: antiquewhite;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);

}

header > nav {
    display: flex;
    justify-content: center;
    background-color: #16a198;
    padding: 0px;
    width: 100%;
}
header > nav > ul {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    padding: 0px;
    list-style: none;
    align-items: center;
}
header > nav > ul > li {
    text-align: center;
}
header > nav > ul > li > a {
    color: white;
    text-decoration: none;
    font-size: 1.5em;
    padding: 0.25rem;
    margin: 0.25rem;
    transition: all 1s;
}