body {
    height: 100vh;
    font-family: "Nanum Gothic";
    background-color: dimgray;
    display: flex;
    flex-direction: column;
    margin: 0;
}
.headerless {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
header {
    position: sticky;
    width: 100%;
    height: 15vh;
    top:0;
    align-items: center;
    justify-content: center;
    display: flex;
    flex-direction: column;
    border-width: 1px;
    border-color: lightgray;
    border-style: solid;
    background-color: white;
    background-color: rgba(256, 256, 256, 0.5);
}
.menu {
    background-color: grey;
    height: 40%;
    width: 60%;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
}
.signup, .checkin {
    display: flex;
    background-color: darkgray;
    padding: 5px;
    border-radius: 5px;
    flex: 3;
    margin-left: 5%;
    margin-right: 5%;
}
.signup:hover, .checkin:hover {
    background-color: lightgray;
}
a.filling_link {
    display: flex;
    text-decoration: none;
    color: black;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    font-size: 30px;
    font-weight: bolder;
}
.spacer {
    flex: 1;
}
#vmk {
    color: #ffffff;
    font-size: 50px;
    font-weight: 1200;
    margin-top: 0%;
}
.navlinks {
    display: flex;
    gap: 25px;
    width: 100%;
    justify-content: space-evenly;
}
.navlinks a {
    text-decoration: none;
    color: #ffffff;
}
.kakao img.kakao_yellow {
    display: none;
}
.kakao:hover img.kakao_brown {
    display: none;
}
.kakao:hover img.kakao_yellow {
    display: inline;
}
.kakao img {
    max-width: 100%;
    max-height: 100%;
}
footer {
    height: 12vh;
}