/* ==========================================================================
   1. 基本設定 & 共通パーツ
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #0a0a0a;
    color: #e0e0e0;
    font-family: 'Shippori Mincho', serif;
    line-height: 1.8;
}

/* セクション共通 */
section {
    margin-bottom: 80px;
}

.section-title {
    margin-bottom: 30px;
}

.section-title img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* --- ボタン設定 --- */
.guest-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}

.btn {
    display: inline-block;
    padding: 6px 15px;
    font-size: 0.85rem;
    text-decoration: none;
    border: 1px solid #d00b0b;
    color: #fff !important; /* 他のリンク設定に負けないよう固定 */
    transition: all 0.3s ease;
    border-radius: 2px;
    font-weight: normal !important;
}

.btn:hover {
    background-color: #d00b0b;
    color: #fff !important;
    box-shadow: 0 0 15px rgba(138, 43, 226, 0.6);
    text-shadow: none !important; /* 蛍光グリーンの発光エフェクトを打ち消す */
}

.btn-x:before {
    content: "𝕏 ";
    font-weight: bold;
}

.btn-yt:before {
    content: "▶ ";
}

/* ==========================================================================
   2. PC向けレイアウト（デフォルト）
   ========================================================================== */
.container {
    display: flex;
    min-height: 100vh;
}

/* --- 左カラム（PC固定） --- */
.left-column {
    width: 40%;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    background-color: #000;
    overflow: hidden;
    border-right: 2px solid #000000;
}

.main-visual {
    position: relative;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
}

.event-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 0;
}

.main-info {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 400px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.event-logo {
    width: 90%;
    max-width: 380px;
    height: auto;
    display: block;
    filter: drop-shadow(0 0 15px rgba(138, 43, 226, 0.6));
}

/* --- 右カラム（PCスクロール） --- */
.right-column {
    width: 60%;
    margin-left: 40%;
    padding: 60px 50px;
    background: linear-gradient(to top, #3a0000 0%, #0a0a0a 50%, #3a0000 100%);
}

/* ==========================================================================
   3. 各セクションの個別スタイル
   ========================================================================== */

/* --- お知らせ --- */
.news-list {
    list-style: none;
}

.news-list li {
    padding: 10px 0;
    border-bottom: 1px solid #333;
}

.news-list .date {
    color: #d00b0b;
    margin-right: 15px;
}

/* --- イベント概要 --- */
#about {
    text-align: center;
    border-radius: 10px;
    border: 1px solid #000000; 
    padding: 30px 25px 40px; 
    background-color: rgba(0, 0, 0, 0.4); 
    box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.8), 0 0 10px rgba(138, 43, 226, 0.1);
}

#about img {
    margin: 0 auto;
}

#about p {
    font-size: 1.25rem;
    line-height: 1.8;
    color: #fff;
    letter-spacing: 0.08em;
}

/* --- 出演者カード --- */
.guest-card {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
    background: rgba(255, 255, 255, 0.03);
    padding: 20px;
    border-radius: 5px;
}

.guest-card img {
    width: 220px;
    height: 220px;
    border: 2px solid #d00b0b;
    object-fit: cover;
    flex-shrink: 0; 
}

.guest-card h3 {
    color: #d00b0b;
    margin-bottom: 10px;
}

/* 音声プレイヤー */
.voice-player {
    margin-top: 15px;
    margin-bottom: 15px;
    background: rgba(0, 0, 0, 0.3);
    padding: 10px 15px;
    border-radius: 5px;
    border: 1px solid rgba(138, 43, 226, 0.3);
}

.player-title {
    font-size: 0.85rem;
    color: #bc8cf2;
    margin-bottom: 5px;
    letter-spacing: 0.05em;
}

.voice-player audio {
    width: 100%;
    height: 40px;
    outline: none;
}

.voice-player audio::-webkit-media-controls-enclosure {
    background-color: #35054b;
    border-radius: 4px;
}

/* --- テーブル --- */
.info-table {
    width: 100%;
    border-collapse: collapse;
}

.info-table th, .info-table td {
    padding: 15px;
    border-bottom: 1px solid #333;
    text-align: left;
}

.info-table th {
    width: 30%;
    color: #fff;
}

/* --- お問い合わせ --- */
.contact-box {
    text-align: center;
    background: rgba(138, 43, 226, 0.1);
    padding: 40px;
}

.tel {
    font-size: 1.8rem;
    margin: 15px 0;
    color: #fff;
}

footer {
    text-align: center;
    font-size: 0.8rem;
    color: #ffffff;
    margin-top: 40px;
}

/* ==========================================================================
   4. スマートフォン向け設定（画面幅 768px 以下）
   ========================================================================== */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .left-column {
        width: 100%;
        height: auto;
        position: relative;
        top: auto;
        left: auto;
        border-right: none;
        border-bottom: 2px solid #4b0082;
    }

    .main-visual {
        height: auto;
        padding: 50px 20px;
    }
    
    .event-logo {
        width: 60%;
        max-width: 240px;
    }

    .right-column {
        width: 100%;
        margin-left: 0;
        padding: 40px 20px;
    }

    #about p {
        font-size: 1.1rem;
    }

    .guest-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .guest-card img {
        width: 180px;
        height: 180px;
    }

    .guest-links {
        justify-content: center;
        width: 100%;
    }
    
    .btn {
        flex: 1;
        min-width: 100px;
        text-align: center;
    }

    .info-table th, .info-table td {
        display: block;
        width: 100%;
        padding: 10px 5px;
    }

    .info-table th {
        border-bottom: none;
        padding-bottom: 0;
        color: #d00b0b;
    }
    
    .tel {
        font-size: 1.4rem;
    }
    
    #event-video {
        margin-bottom: 60px;
    }
}

/* ==========================================================================
   5. 追加機能（テキストリンク蛍光化 & YouTubeレスポンシブ）
   ========================================================================== */

/* --- 右カラム内のテキストリンク設定 --- */
.right-column a {
    color: #39ff14; 
    text-decoration: underline; 
    text-underline-offset: 4px; 
    transition: all 0.3s ease;
    font-weight: bold; 
}

.right-column a:hover {
    color: #fff; 
    text-shadow: 0 0 10px #39ff14, 0 0 20px #39ff14; 
    text-decoration: none; 
}

/* --- YouTubeレスポンシブ対応 --- */
.youtube-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%; 
    box-shadow: 0 0 20px rgba(138, 43, 226, 0.3); 
    border: 1px solid #000;
    margin: 30px;
}

.youtube-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100% !important;
    height: 100% !important;
}