@import url('https://fonts.googleapis.com/css2?family=Libre+Caslon+Text&family=Noto+Serif+JP&family=Noto+Color+Emoji&display=swap');

html {
    background: #009de6;
    color: #ffffff;
    font-family: "Libre Caslon Text", "Noto Serif JP", serif, "Noto Color Emoji";
    line-height: 1.5;
    overflow-y: scroll;
    text-align: center;
}
body {
    margin: 0;
}
header {
    background: #ffffff;
    color: #009de6;
    padding: 1em 0;
}
header h1 {
    font-weight: normal;
    margin: auto;
    padding: 0 8px;
}
main {
    margin: 1em auto 0;
    max-width: 640px;
    padding: 8px;
}
a, ::marker {
    color: #ffffff;
}
main a {
    border: 0.1em solid #ffffff;
    border-radius: 1em;
    display: block;
    font-size: 1.5em;
    margin: 0.5em;
    padding: 0.5em;
    text-decoration: none;
    transition: 0.1s;
}
main a:hover {
    background: #ffffff;
    color: #009de6;
}
a#vivi {
    display: none;
}
span#vivi-gbv {
    display: block;
    transform: scale(0.8621, 1);
}
span#vivi-v {
    font-size: 2em;
}
.font-size-zero {
    font-size: 0;
}