unit#mask, unit#maskGlass {
    width: 100%;
    height: 100vh;
    position: fixed;
    left: 0;
    bottom: 0;
    z-index: -1;
}
unit#maskGlass {
    backdrop-filter: blur( 10px );
}
main {
    display: block;
    width: 620px;
    margin: 100px auto;
    background: rgb( var( --r5 ) );
    border-radius: 10px;
    box-shadow: 0px 0px 10px rgb( var( --r1 ), 0.1 );
}
header {
    display: block;
    width: 100%;
    height: 300px;
    position: relative;
}
header div.title {
    width: 100%;
    padding: 30px 45px;
    background: linear-gradient( to bottom, rgb( var( --r1 ), 0 ), rgb( var( --r1 ) ) );
    color: rgb( var( --r0 ) );
    position: absolute;
    bottom: 0;
}
header div.title h3 {
    margin-bottom: 8px;
}
header div.title a#back {
    display: inline-block;
    padding: 6px 14px;
    background: rgb( var( --r2 ) );
    color: rgb( var( --r1 ) );
    border-radius: 5px;
}
div#body {
    padding: 40px 25px;
}
div#body form {
    display: block;
    margin: 0px auto;
    max-width: 360px;
}
div#body form div.button a.button {
    background: rgb( var(--r3), 0.65 );
}
div#body form div.button a.button:hover {
    background: rgb( var(--r3) );
}
ul#otherButton {
    display: grid;
    padding: 0px 90px;
    grid-template-columns: repeat( auto-fit, minmax( 100px, 1fr ) );
    grid-auto-rows: 60px;
    grid-gap: 8px;
}
ul#otherButton li {
    padding-right: 10px;
    background: rgb( var(--r3), 0.65 );
    color: rgb( var(--r1), 0.75 );
    font-size: 16px;
    font-weight: bold;
    text-align: center;
    line-height: 60px;
    border-radius: 5px;
    overflow: hidden;
    cursor: pointer;
    position: relative;
}
ul#otherButton li::before {
    color: rgb( var(--r1), 0.1 );
    font-size: 36px;
    font-weight: bold;
    position: absolute;
    bottom: -25px;
    right: -10px;
}
ul#otherButton li:hover, ul#otherButton li:hover::before {
    color: rgb( var(--r1) );
}
footer {
    padding: 40px;
}
footer p {
    font-size: 14px;
    text-align: center;
}
@media ( max-width: 660px ) {
    unit#mask, unit#maskGlass {
        display: none;
    }
    main {
        width: 100%;
        margin: 0;
        background: rgb( var( --r0 ) );
        border-radius: 0;
    }
    header {
        height: 240px;
        border-radius: 0px 0px 20px 20px;
    }
    header div.title {
        padding: 25px 30px;
    }
    ul#otherButton {
        padding: 0px 25px;
    }
}