@charset "UTF-8";
/***************************************************
 *
 * BUILD スタイルシート
 *
 ***************************************************/

/* =======================================
 * 1. 変数と基本フォント設定
 * ======================================= */
@import url('https://fonts.googleapis.com/css2?family=Zen+Kaku+Gothic+New:wght@700&display=swap');

:root {
    /* Color Palette */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-card: #333333;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #999999;
    --accent-gold: #d4af37;
    --accent-blue: #00bcd4;
    --accent-red: #ff4444;
    --accent-green: #4caf50;
    --border-color: #444444;

    /* Effects */
    --shadow-dark: 0 4px 20px rgba(0, 0, 0, 0.5);

    /* Fonts */
    --font-jp-display: 'Zen Kaku Gothic New', sans-serif;
}


/* =======================================
 * 2. 基本設定とリセット
 * ======================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-gold);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #b8941f;
}


/* =======================================
 * 3. 主要セクションのスタイル
 * ======================================= */

/* --- ヘッダー (Navbar) --- */
.navbar {
    background-color: var(--bg-primary) !important;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}

.navbar-brand img {
    max-height: 40px;
    width: auto;
}

.navbar-nav .nav-link {
    color: var(--text-primary) !important;
    font-weight: 500;
    margin: 0 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: var(--accent-gold) !important;
}

.navbar-toggler {
    border: none;
    color: var(--text-primary);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* --- ヒーローセクション --- */
.hero {
    height: 100vh;
    background: url('../img/ad4I0095_2.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(4px);
    z-index: 1;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.hero-top-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.1rem;
}

.build-logo-img {
    max-width: 600px;
    width: 90vw;
    height: auto;
}

.collab-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
}

.collab-logos img {
    height: 82px;
    width: auto;
}

.collab-logos span {
    color: #000000;
    font-weight: 900;
    font-size: 5.0rem;
    margin-bottom: 1rem;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.3);
}

.hero-collab {
    font-size: 2.2rem;
    color: var(--text-primary);
    margin-bottom: 0;
    letter-spacing: 2px;
    font-family: var(--font-jp-display);
    font-weight: 700;
}

.hero-cta {
    background-color: var(--accent-red);
    color: white;
    padding: 15px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 1rem;
}

.hero-cta:hover {
    background-color: #cc3333;
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-dark);
}

/* --- 汎用セクション設定 --- */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 50px;
    color: var(--text-primary);
    text-shadow: 0 0 15px var(--accent-blue), 0 0 25px rgba(0, 188, 212, 0.5);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* --- イベント概要 (Event Section) --- */
.event {
    padding: 80px 0;
    background-color: var(--bg-primary);
}

.event-card {
    background-color: var(--bg-card);
    border-radius: 15px;
    padding: 40px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-dark);
}

.event-info {
    font-size: 1.1rem;
    margin-bottom: 15px;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.event-info:last-child {
    border-bottom: none;
}

.event-info strong {
    color: var(--accent-blue);
    margin-right: 10px;
}

/* --- ABOUT BUILD (About Section) --- */
.about {
    padding: 80px 0;
    background-color: var(--bg-secondary);
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 15px;
}

/* --- ABOUT BUILDセクションのテキストスタイル --- */
.about p {
    color: var(--text-primary);
    /* 文字色を明るい白に */
    font-size: 1.1rem;
    line-height: 1.8;
}

.about .about-theme {
    color: var(--accent-gold);
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 40px;
    margin-bottom: 20px;
}

/* --- ビデオセクション (Video Section) --- */
.video {
    padding: 80px 0;
    background-color: var(--bg-primary);
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 15px;
    box-shadow: var(--shadow-dark);
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 15px;
}

/* --- チケットセクション (Tickets Section) --- */
.tickets {
    padding: 80px 0;
    background-color: var(--bg-secondary);
}

.ticket-card {
    background-color: var(--bg-card);
    border-radius: 15px;
    padding: 40px;
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-dark);
    transition: transform 0.3s ease;
}

.ticket-card:hover {
    transform: translateY(-5px);
}

.ticket-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-gold);
    margin-bottom: 20px;
}

.ticket-description {
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 1.1rem;
}

/* --- エントリーセクション (Entry Section) --- */
.entry {
    padding: 80px 0;
    background-color: var(--bg-primary);
}

.entry-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 15px;
}

/* --- エントリー募集要項のリストスタイル --- */
.entry-list {
    list-style: none;
    /* 箇条書きの黒丸を削除 */
    padding: 0;
    margin-top: 20px;
}

.entry-list li {
    color: var(--text-secondary);
    padding: 12px 0;
    /* 上下の余白 */
    border-bottom: 1px solid var(--border-color);
    /* 区切り線 */
}

.entry-list li:last-child {
    border-bottom: none;
    /* 最後の項目の線だけ削除 */
}

.entry-list strong {
    color: var(--accent-gold);
    /* 項目名を金色に */
    margin-right: 10px;
}

/* --- ブースセクション (Booth Section) --- */
.booth {
    padding: 80px 0;
    background-color: var(--bg-secondary);
}

.booth-card {
    background-color: var(--bg-card);
    border-radius: 15px;
    padding: 40px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-dark);
}

.booth-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-gold);
    margin-bottom: 20px;
    text-align: center;
}

.booth-description {
    color: var(--text-secondary);
    margin-bottom: 30px;
    text-align: center;
}

.booth-list {
    list-style: none;
    padding: 0;
}

.booth-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.booth-list li:last-child {
    border-bottom: none;
}

.booth-list strong {
    color: var(--accent-blue);
    margin-right: 10px;
}

/* --- 汎用ボタン (Entry Button) --- */
.entry-button {
    background-color: white;
    color: rgb(29, 29, 29);
    padding: 15px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    margin-top: 30px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.entry-button:hover {
    background-color: #d4af37;
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-dark);
}

.ticket-button {
    background-color: white;
    color: rgb(29, 29, 29);
    padding: 15px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.ticket-button:hover {
    background-color: #d4af37;
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-dark);
}

/* =======================================
 * 4. #details セクション（白背景）の専用スタイル
 * ======================================= */
#details {
    padding: 80px 0;
    background-color: #ffffff;
    position: relative;
}

#details .section-title {
    color: #000000;
    text-shadow: none;
}

#details p {
    color: #000000;
    line-height: 1.8;
}

#details .entry-image img {
    height: auto;
    object-fit: initial;
}

#details .entry-button {
    background-color: var(--accent-gold);
    color: #000000;
}

#details .entry-button:hover {
    background-color: #b8941f;
    color: #000000;
}

/* =======================================
 * 5. フッター
 * ======================================= */
.footer {
    padding: 60px 0 20px;
    border-top: 1px solid var(--border-color);
}

.footer h3 {
    color: var(--accent-gold);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.footer p {
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: var(--accent-gold);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    margin-top: 40px;
    text-align: center;
    color: var(--text-muted);
}

.footer .row {
    justify-content: space-between !important;
}

.footer-bottom {
    text-align: center;
    margin-top: 2rem;
}

/* =======================================
 * 6. レスポンシブ設定
 * ======================================= */
@media (max-width: 768px) {
    .hero {
        background-attachment: scroll;
    }

    .build-logo-img {
        max-width: 320px;
    }

    .collab-logos img {
        max-height: 36px;
    }

    .hero-collab {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .event-card,
    .ticket-card,
    .booth-card {
        padding: 30px 20px;
    }

    .navbar-nav .nav-link {
        margin: 5px 0;
    }
}