@charset "UTF-8";

/* --- 全体設定 --- */
body {
    font-family: 'Noto Sans JP', sans-serif;
    margin: 0;
    background-color: #fff;
    color: #333;
}

h2 {
    font-size: 2rem;
    color: #00285F; /* アクセントカラー: 紺色 */
    font-weight:bold;
    text-align: center;
    margin-bottom: 38px; /* 下線のために余白を増やす */
    position: relative;
    padding-bottom: 12px;
}

h2::after {
    content: '';
    display: block;
    width: 50px;
    height: 1px;
    background-color: #00285F;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

section {
    padding: 80px 5%;
}

img {
    max-width: 100%;
    height: auto;
    vertical-align: bottom; /* 画像下の余白対策 */
}


/* --- 1. メインビジュアル --- */
.main-visual img {
    width: 100%;
    object-fit: cover;
}

section.main-visual {
    padding-bottom: 0;
}

/* --- 2. 見出しと文章 --- */
.text-block {
    text-align: center;
}

.text-block p {
    line-height: 1.8;
}

/* --- 3. 開催概要 --- */
.info-block {
    background-color: #f8f9fb;
    background: linear-gradient(120deg, #f8fbff, #ebeff7);
}
.info-block dl {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    border-top: 1px solid #ccc;
}
.info-block dt,
.info-block dd {
    padding: 20px;
    box-sizing: border-box;
    border-bottom: 1px solid #ccc;
}
.info-block dt {
    width: 30%;
    font-weight: bold;
    background-color: #e9edf2;
     /* Add right border for desktop */
}
.info-block dd {
    width: 70%;
     /* Add left border for desktop */
    background: #fff;
}
.info-block dl.program {
    border: none;
}

.info-block dl.program dt {
    background: none;
    border: none;
    width: 15%;
    padding: 0;
}

.info-block dl.program dd {
    width: 85%;
    border: none;
    padding: 0;
}

.info-block dl.program dt:nth-of-type(1),
.info-block dl.program dd:nth-of-type(1){
    margin-bottom:10px;
}

/* --- 4. 横並び画像 --- */
.gallery-images {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.gallery-images img {
    width: calc((100% - 40px) / 3);
    aspect-ratio: 1.5 / 1;
    object-fit: cover;
}


/* --- 5. 埋め込み要素 --- */
.embed-block {
    background-color: #f8f9fb;
    background: linear-gradient(120deg, #f8fbff, #ebeff7);
    text-align: center;
}

.form-wrap {
    display: flex;
    justify-content: center;
}


/* --- 6. フッター --- */
.footer {
    background-color: #00285F; /* アクセントカラー: 紺色 */
    color: #fff;
    padding: 40px 5%;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 1000px;
    margin: 0 auto;
}

.footer-logo {
    width: 150px;
    margin-right: 40px;
}

.footer-info .company-name {
    font-size: 1.1rem;
    margin: 0 0 10px 0;
}

.footer-info .tel {
    margin: 0;
}


/* --- アニメーション --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s, transform 0.8s;
}

.fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}


/* --- スマートフォン版 (SP) --- */
@media screen and (max-width: 767px) {
    h2 {
        font-size: 1.5rem;
        margin-bottom: 30px;
    }

    section {
        padding: 60px 5%;
    }

    /* --- 1. メインビジュアル --- */

    /* --- 3. 開催概要 --- */
    .info-block dt {
        border-right: none; /* Remove right border for mobile */
    }
    .info-block dd {
        border-left: none; /* Remove left border for mobile */
    }

    /* --- 4. 横並び画像 --- */
    .gallery-images {
        flex-wrap: wrap;
        gap: 15px;
    }

    .gallery-images img {
        width: calc((100% - 15px) / 2);
    }
    
    /* --- 6. フッター --- */
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    .footer-logo {
        margin: 0 0 20px 0;
    }
}