body {
    font-family: Helvetica, Arial, sans-serif;
    background-image: url('background.jpg');
    background-size: cover;
    background-attachment: fixed;
    margin: 0;
    padding: 0;
}

header {
    background-color: rgba(51, 51, 51, 0.7);
    color: #fff;
    text-align: center;
    padding: 5px 0;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* 文字のスタイル */
h1 {
    font-size: 36px;
    margin-bottom: 10px;
    text-shadow: 2px 2px 10px rgb(168, 168, 168);
}

h2 {
    margin: 25px 0 10px;
    display: inline-block;
}


h3 {
    margin: 5px 0px 3px 5px;
}

h4 {
    margin: 5px 0px 1px 10px;
    font-weight: 600;
}

p {
    margin: 0 0 15px 15px;
    font-weight: lighter;
}

.n {
    font-weight: normal;
}

.top {
    margin-top: -5px;
}

.about {
    font-size: 13pt;
    font-weight: normal;
    line-height: 1.15;
    margin: -5px 0px 7px 5px;
    text-align: justify;
    text-indent: 0.25em;
}

.contact {
    margin-top: -5px;
    font-weight: normal;
}

span {
    display: inline-block;
}

/* メインのスタイル */
.menu {
    text-align: center;
    background-color: rgba(51, 51, 51, 0.7);
    padding: 10px 0;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.menu a {
    /* 通常の文字色を黄色に設定 */
    text-decoration: none;
    transition: color .7s;
    /* ホバーエフェクトのトランジションを設定 */
    margin: 25px;
    line-height: 1.4;
}


.menu a[href="#"] {
    /* text-shadow:1px 1px 2px #fcf8ad,-1px 1px 2px #fcf8ad,1px -1px 2px #fcf8ad,-1px -1px 2px #fcf8ad; */
    text-shadow: 0 0 10px #fcf8ad, 0 0 10px #fcf8ad, 0 0 10px #fcf8ad;
}

.menu a.m1 {
    color: rgb(212, 255, 253);
}

.menu a.m2 {
    color: rgb(212, 234, 255);
}

.menu a.m3 {
    color: rgb(228, 212, 255);
}

.menu a[href="#"] {
    /* text-shadow:1px 1px 2px #fcf8ad,-1px 1px 2px #fcf8ad,1px -1px 2px #fcf8ad,-1px -1px 2px #fcf8ad; */
    text-shadow: 0 0 10px #fcf8ad, 0 0 10px #fcf8ad, 0 0 10px #fcf8ad;
}

.menu a:hover {
    color: #fcf8ad;
    /* ホバーエフェクトで文字色を白に変更 */
}

.container {
    max-width: 800px;
    margin: 10px auto 20px;
    padding: 20px;
    background-color: rgba(255, 255, 255, 0.7);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
}

.right-container {
    float: right;
    width: 200px;
    margin: auto 0 0 20px;
}

.icon {
    float: right;
    /* 右上にアイコンを配置 */
    margin: 0px 0px 15px 5px;
    /* アイコンの位置調整 */
    width: 100%;
}

.icon-small {
    float: right;
    /* 右上にアイコンを配置 */
    margin: 0px 0px 15px 5px;
    /* アイコンの位置調整 */
    width: 15%;
}

/* 埋め込み関係のスタイル */
iframe {
    width: 100%;
    height: 300px;
    border: none;
    border-radius: 7px;
}

.iframe-long {
    width: 100%;
    height: 1400px;
    border: none;
    border-radius: 7px;
}

.clearfix::after {
    content: '';
    display: block;
    clear: both;
    margin: -15pt;
}

.map {
    /* 効いていない */
    padding-top: 10px;
    width: 200px;
    height: 1;
    position: center;
}

.access-map {
    /* 効いていない */
    position: center;
}

.logos {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    width: 100%;
    max-width: 1080px;
    /* 必要に応じて調整 */
    gap: 5px;
}

.logo_icon {
    height: 70px;
    width: auto;
}

/* リストのスタイル */
ul {
    margin: 0px 0px 10px;
    list-style: none;
    padding: 0;
    ;
}

li {
    margin-bottom: 0px;
    padding: 5px 15px 0px;
    font-size: 12pt;
    font-weight: 500;
}

.aff {
    font-size: 11.5pt;
    font-family: 'Gill Sans';
    margin: 2pt 2pt 2pt 10pt;
    font-weight: 300;
}

.tut {
    font-size: 10pt;
    font-family: 'Gill Sans';
    font-weight: bold;

    position: relative;
    padding: 0.15rem 0.3rem;
    text-align: center;
    margin: 0px 20px 0px 0px;
}

.tut::before,
.tut::after {
    position: absolute;
    width: 75%;
    height: 75%;
    content: '';
}

.tut::before {
    border-left: solid 2px;
    border-top: solid 2px;
    top: 0;
    left: 0;
}

.tut::after {
    border-right: solid 2.5px;
    border-bottom: solid 2.5px;
    bottom: 0;
    right: 0;
}

.flex_box {
    display: flex;
    flex-direction: row;
    text-align: left;
}

.flex_item {
    width: 50%;
    min-width: 320px;
    padding: auto;
}


.scroll-table {
    overflow-x: auto;
    margin: -10px 5px 5px 10px;
}

table {
    border: 1px solid #000;
    border-collapse: collapse;
    width: 100%;
}

th,
td {
    border: 1px solid #000;
    padding: 10px 0;
    text-align: center;
    font-size: 10pt;
    font-weight: lighter;
    /* 文字サイズを調整 */
}

th {
    background-color: #f7f3d68f;
    font-weight: normal;
}

p.notes {
    margin: 0 0 0 15px;
    font-weight: lighter;
}

.normal-list li {
    font-weight: lighter;
    margin-top: 0;
}

.sponsor-list li {
    font-weight: lighter;
    list-style: disc;
    margin-left: 25px;
    padding-left: 1pt;
}

@keyframes gradientBG {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.form {
    font-weight: bold;
    color: #fff;
    background: linear-gradient(90deg,
            hwb(132 5% 25%),
            /* green */
            hwb(201 64% 0%),
            /* cyan */
            hwb(256 67% 0%),
            /* indigo */
            hwb(300 64% 0%),
            /* violet */
            hwb(60 14% 0%),
            /* yellow */
            hwb(132 5% 25%)
            /* green */
        );
    background-size: 400% 400%;
    border-radius: 6px;
    text-decoration: none;
    text-shadow: 0 0 02px black;
    animation: gradientBG 5s ease-in-out infinite;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
    padding: 6px 20px;
    margin-left: 8px;
}

@media screen and (max-width:640px) {

    /*　画面サイズが640px以下の場合ここの記述が適用される　*/
    .right-container {
        width: 25%;
        margin-left: 20px;
    }

    .map {
        display: none;
    }

    .menu a {
        margin: 10px;
    }

    .flex_box {
        flex-direction: column;
    }

    .flex_item {
        width: 100%;
    }

    .clearfix::after {
        display: none;
    }

    .tut {
        margin-left: 0;
    }

    .logo_icon {
        height: 50px;
        width: auto;
    }

    .form {
        display: inline-block;
        width: 50%;
        margin-top: 10px;
        margin-bottom: 10px;
        padding: 10px 20px;
        text-align: center;
    }
}

@media screen and (min-width:640px) {

    /*　画面サイズが640px以上の場合ここの記述が適用される　*/
    .access {
        display: none;
    }

    .access-map {
        display: none;
    }

    .tut-br {
        display: none;
    }

    .form {
        display: inline-block;
        margin-top: 0px;
        margin-bottom: 0px;
    }
}


.dom::before {
    content: '@googlegroups.';
}