#hc-main-wrapper {
    background-color: #fff;
    height: 100vh;
    height: calc(var(--vh, 1vh) * 100);
    overflow-x: hidden;
    overflow-y: auto;
}

#hc-main {
    min-height: 100%;
    padding: 1rem;
    position: relative;
}

#main .required::after {
    display: inline-block;
    margin-left: 5px;
    padding: 0.3em 0.4em;
    font-size: 70%;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    -webkit-transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out,
        -webkit-box-shadow 0.15s ease-in-out;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out,
        -webkit-box-shadow 0.15s ease-in-out;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out,
        box-shadow 0.15s ease-in-out;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out,
        box-shadow 0.15s ease-in-out, -webkit-box-shadow 0.15s ease-in-out;
    color: var(--danger);
    background-color: #fff;
    border: 1px solid var(--danger);
    border-radius: 4px;
    content: "必須";
}