#mainImg {
    background-image: url("../seminar/img/bg_main.png?ts=2501");
}

#contents h3 {
    font-size: clamp(18pt ,2vw, 22pt);
    font-weight: bold;
    text-align: center;
    margin-bottom: .5em;
}

#contents #info .detail {
    text-align: center;
    margin-bottom: 1em;
}
#contents #info .detail > ul {
    display: inline-block;
    border: 1px solid var(--main-color);
    padding: 1em 1.5em;
}
#contents #info .detail > ul li {
    color: var(--main-color);
    font-weight: bold;
}

#contents #info .message > div {
    display: flex;
    align-items: center;
    gap: 5px;
    margin-bottom: .5em;
}
#contents #info .message > div > div:nth-child(1) {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--color-white);
    font-weight: bold;
    background-color: var(--main-color);
    padding: .8em 0 .6em;
    border-radius: 100%;
    width: 80px;
}
#contents #info .message > div > div:nth-child(1) > div {
    color: #ff0;
    text-align: center;
    line-height: 1.2;
}
#contents #info .message > div > div:nth-child(1) > div:nth-child(1) {
    font-size: 110%;
}
#contents #info .message > div > div:nth-child(1) > div:nth-child(2) {
    font-size: 140%;
}
#contents #info .message > div > div:nth-child(2) p {
    font-weight: bold;
    /* font-size: 140%; */
    font-size: clamp(20px, 1.5vw, 24px);
}
#contents #info .message > div > div:nth-child(2) p > span {
    font-weight: bold;
}
#contents #info .message > div > div:nth-child(2) p > small {
    font-size: 80%;
}
#contents #info .schedule > div {
    display: flex;
    justify-content: flex-end;
    align-items: flex-end;
    gap: 1em;
}
/* #contents #info .schedule > div > div:nth-child(1) {
    flex: 1;
} */
#contents #info .schedule h3 {
    text-decoration: underline;
    margin-top: 2em;
}

#contents #info .schedule table {
    width: 100%;
    border-collapse: collapse;
    box-sizing: border-box;
    margin-bottom: 4em;
}
#contents #info .schedule table tr td {
    vertical-align: middle;
    border: 1px solid var(--sub-color);
    padding: 1em;
}
#contents #info .schedule table tr td:nth-child(1) {
    background-color: #fadfe3;
    text-align: center;
    white-space: nowrap;
    max-width: 100px;
}

#contents #form .form {
    background-color: var(--color-white);
    padding: 3em;
}

#contents .form dl > div {
    display: flex;
    gap: 1em;
    margin-bottom: 1.8em;
}
#contents .form dl > div dt {
    width: 15em;
    padding-top: 10px;
}
#contents .form dl > div dd {
    flex: 1;
}
#contents .form dl > div dd .how_to_replay_list {
    display: grid;
    grid-template-columns: repeat(4, 80px);
    margin-bottom: .5em;
}

#contents form .btnBox {
    text-align: center;
}

#contents form .btnBox .btn {
    font-size: 105%;
    padding: 5px 1.5em;
}
#contents form .btnBox .btn.back {
    border-color: #999;
    background-color: #999;
}
#contents form .btnBox .btn.back:hover {
    color: #999;
    background-color: #fff;
}

#confirm #contents .form dl > div dt {
    padding-top: 0;
}


@media screen and (max-width: 430px){
    #mainImg {
        background-image: url("../seminar/img/bg_main_sp.png");
    }

    /* #contents #info .message > div > div:nth-child(1) {
        width: 200px;
    } */
    #contents #info .message > div > div:nth-child(2) {
        line-height: 1.3;
    }
    #contents #info .schedule > div {
        flex-direction: column;
    }
    #contents #form .form {
        padding-inline: 10px;
    }
    #contents .form dl > div {
        flex-direction: column;
        gap: .5em;
        margin-bottom: 1em;
    }
    #contents .form dl > div dt {
        width: auto;
    }

    #contents .form dl > div dd .how_to_replay_list {
        grid-template-columns: repeat(2, .5fr);
        gap: .5em;
    }

    #contents .form .btnBox dd {
        text-align: center;
    }
    #contents .form .btnBox dd button {
        margin-bottom: 1.5em;
    }
    #contents .form .btnBox .btn {
        width: 100%;
    }
    #contents .form input,
    #contents .form select,
    #contents .form textarea
    {
        font-size: 95%;
    }
}