* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "Yu Gothic", sans-serif; background: #111; color: #fff; line-height: 1.7; }
img { max-width: 100%; }
.site-header { position: sticky; top: 0; z-index: 1000; display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 12px 24px; background: #000; box-shadow: 0 3px 10px rgba(0,0,0,.5); }
.header-left { display: flex; align-items: center; gap: 12px; }
.logo-link { display: block; line-height: 0; }
.logo { display: block; width: auto; height: 60px; }
.nav { display: flex; gap: 10px; }
.nav a { padding: 10px 16px; color: #fff; background: #333; text-decoration: none; border-radius: 8px; }
.nav a:hover { color: #000; background: orange; }
.menu-btn { display: none; padding: 6px; color: #fff; background: none; border: 0; font-size: 30px; cursor: pointer; }
.content { width: 100%; max-width: 1100px; margin: 0 auto; padding: 32px; }
.page-title, .latest-event-title, .event-detail-title, .contact-title, .social-title { text-align: center; }
.latest-event-title { margin-bottom: 24px; }
.card { overflow: hidden; background: #222; border: 2px solid transparent; border-radius: 14px; }
.card a { display: block; color: #fff; text-decoration: none; }
.card img { display: block; width: 100%; height: 220px; object-fit: contain; background: #080808; }
.card h2, .card h3 { padding: 16px; text-align: center; }
.card.latest-event-card { width: 100%; max-width: 900px; margin: 0 auto; }
.card.latest-event-card img { width: 100%; height: auto; }
.event-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(260px,1fr)); gap: 20px; margin-top: 24px; }
.news-section { width: 100%; max-width: 700px; margin: 60px auto 0; }
.latest-news-title { margin-bottom: 24px; text-align: center; }
.news-list { overflow: hidden; background: #222; border-radius: 14px; }
.news-item { display: flex; align-items: center; gap: 24px; padding: 18px 20px; border-bottom: 1px solid #444; }
.news-item:last-child { border-bottom: 0; }
.news-item time { flex-shrink: 0; color: orange; font-weight: 700; }
.news-link { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
.description { max-width: 700px; margin: 20px auto; }
.event-detail-image { display: block; width: 100%; max-width: 500px; height: auto; margin: 20px auto; border-radius: 12px; }
.event-information { width: 100%; max-width: 900px; margin: 50px auto 0; }
.event-information-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.event-information-card { padding: 24px 16px; text-align: center; background: #222; border: 1px solid #444; border-radius: 14px; }
.event-information-label { margin-bottom: 10px; color: #aaa; font-size: 16px; }
.event-information-value { color: orange; font-size: 24px; font-weight: 700; }
.ticket-purchase-button { display: flex; align-items: center; justify-content: center; width: 100%; max-width: 360px; min-height: 58px; margin: 35px auto 0; padding: 14px 24px; color: #000; background: orange; border-radius: 10px; text-decoration: none; font-size: 18px; font-weight: 700; }
.contact-section, .social-section { width: 100%; max-width: 700px; margin: 60px auto 0; }
.contact-title, .social-title { margin-bottom: 24px; }
.contact-form { width: 100%; padding: 30px; background: #222; border: 1px solid #444; border-radius: 14px; }
.form-group { margin-bottom: 24px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 700; }
.required-label { display: inline-block; margin-left: 6px; padding: 2px 7px; color: #000; background: orange; border-radius: 4px; font-size: 12px; }
.form-group input, .form-group textarea { display: block; width: 100%; padding: 13px 15px; color: #fff; background: #111; border: 1px solid #555; border-radius: 8px; font: inherit; }
.contact-submit { display: block; width: 100%; padding: 14px 20px; color: #000; background: orange; border: 0; border-radius: 8px; font-size: 16px; font-weight: 700; cursor: pointer; }
.form-message { display: none; margin-top: 20px; padding: 14px; text-align: center; border-radius: 8px; }
.form-message.is-success { display: block; color: #d8ffd8; background: #173d22; border: 1px solid #4caf50; }
.social-buttons { display: flex; justify-content: center; gap: 16px; }
.social-button { display: flex; align-items: center; justify-content: center; width: 220px; min-height: 52px; padding: 12px 20px; color: #fff; text-decoration: none; border-radius: 10px; font-weight: 700; }
.x-button { background: #222; border: 1px solid #666; }
.line-button { background: #06c755; border: 1px solid #06c755; }
.site-footer { width: 100%; margin-top: 60px; padding: 28px 20px; color: #aaa; background: #000; border-top: 1px solid #333; text-align: center; }

/* Welcome */
.welcome-screen { position: fixed; inset: 0; z-index: 9999; display: grid; place-items: center; overflow: hidden; background: #000; opacity: 1; visibility: visible; transition: opacity .7s ease, visibility .7s ease; }
.welcome-screen.is-finished { opacity: 0; visibility: hidden; pointer-events: none; }
.welcome-animation { position: relative; width: min(90vw,720px); height: min(80vh,620px); }
.welcome-cube { position: absolute; top: 50%; left: 50%; width: 210px; height: 210px; opacity: 0; transform: translate(-50%,-42%) scale(.65); animation: cube-appear 1s ease .2s forwards; }
.cube-face { position: absolute; background: #eef3fb; border: 5px solid #fff; box-shadow: inset 0 0 28px rgba(120,135,160,.45); }
.cube-front { top: 45px; left: 20px; width: 170px; height: 165px; clip-path: polygon(0 0,52% 18%,100% 0,100% 78%,52% 100%,0 78%); }
.cube-top { top: 0; left: 20px; width: 170px; height: 80px; clip-path: polygon(0 56%,52% 0,100% 56%,52% 100%); }
.cube-right { top: 45px; right: 0; width: 85px; height: 165px; background: #cfd5df; opacity: .7; clip-path: polygon(0 18%,100% 0,100% 78%,0 100%); }
.cube-crack { position: absolute; top: 82px; left: 95px; width: 12px; height: 12px; opacity: 0; background: #111; clip-path: polygon(50% 0,64% 37%,100% 24%,74% 53%,100% 86%,59% 69%,43% 100%,38% 65%,0 82%,29% 51%,4% 23%,40% 37%); animation: crack-appear .28s ease 2.05s forwards; }
.welcome-pick { position: absolute; top: 7%; left: 65%; width: 270px; height: 105px; opacity: 0; transform: translate(140px,-120px) rotate(-48deg); transform-origin: 12% 50%; animation: pick-strike 1.15s cubic-bezier(.7,0,.25,1) 1.05s forwards; }
.pick-handle { position: absolute; top: 18px; right: 0; width: 112px; height: 68px; background: #fff; clip-path: polygon(8% 20%,80% 0,100% 28%,90% 75%,25% 100%,0 72%); }
.pick-shaft { position: absolute; top: 47px; left: 42px; width: 135px; height: 9px; background: #fff; }
.pick-tip { position: absolute; top: 41px; left: 5px; width: 48px; height: 20px; background: #fff; clip-path: polygon(100% 28%,100% 72%,0 50%); }
.ice-particles { position: absolute; top: 47%; left: 49%; }
.particle { position: absolute; width: 20px; height: 20px; opacity: 0; background: #fff; clip-path: polygon(50% 0,100% 100%,0 72%); }
.particle-1 { animation: p1 .65s ease-out 2.05s forwards; }
.particle-2 { animation: p2 .65s ease-out 2.05s forwards; }
.particle-3 { animation: p3 .65s ease-out 2.05s forwards; }
.particle-4 { animation: p4 .65s ease-out 2.05s forwards; }
.welcome-final-logo { position: absolute; top: 50%; left: 50%; z-index: 10; display: block; width: min(76vw,560px); max-height: 72vh; object-fit: contain; opacity: 0; visibility: hidden; transform: translate(-50%,-50%) scale(.82); transition: opacity .45s ease, transform .45s ease; }
.welcome-screen.show-logo .welcome-cube, .welcome-screen.show-logo .welcome-pick, .welcome-screen.show-logo .ice-particles { opacity: 0; visibility: hidden; }
.welcome-screen.show-logo .welcome-final-logo { opacity: 1; visibility: visible; transform: translate(-50%,-50%) scale(1); }
.welcome-skip { position: absolute; right: 24px; bottom: 24px; z-index: 20; padding: 10px 22px; color: #fff; background: rgba(255,255,255,.05); border: 1px solid #777; border-radius: 5px; cursor: pointer; }
@keyframes cube-appear { to { opacity: 1; transform: translate(-50%,-42%) scale(1); } }
@keyframes pick-strike { 0% { opacity: 0; transform: translate(140px,-120px) rotate(-48deg); } 25% { opacity: 1; } 100% { opacity: 1; transform: translate(-98px,104px) rotate(-48deg); } }
@keyframes crack-appear { to { opacity: 1; transform: scale(5.5); } }
@keyframes p1 { 20% { opacity: 1; } to { opacity: 0; transform: translate(-125px,-95px) rotate(150deg); } }
@keyframes p2 { 20% { opacity: 1; } to { opacity: 0; transform: translate(125px,-85px) rotate(-180deg); } }
@keyframes p3 { 20% { opacity: 1; } to { opacity: 0; transform: translate(-145px,45px) rotate(220deg); } }
@keyframes p4 { 20% { opacity: 1; } to { opacity: 0; transform: translate(145px,55px) rotate(-230deg); } }

@media (max-width: 800px) {
    .site-header { padding: 10px 14px; }
    .logo { height: 50px; }
    .menu-btn { display: block; }
    .nav { display: none; position: absolute; top: 76px; right: 10px; flex-direction: column; width: 220px; padding: 12px; background: #000; border-radius: 10px; }
    .nav.active { display: flex; }
    .content { padding: 24px 16px; }
    .news-item { align-items: flex-start; flex-direction: column; gap: 4px; }
    .event-detail-title { font-size: clamp(16px,5vw,24px); white-space: nowrap; }
    .event-information-grid { grid-template-columns: 1fr; gap: 12px; }
    .social-buttons { flex-direction: column; align-items: center; }
    .social-button { width: 100%; max-width: 320px; }
    .welcome-final-logo { width: 86vw; }
}

/* ========================================
   リンク・ボタンのマウスオーバー演出
======================================== */

/* リンク付きカードの基本状態です。 */
.card:has(a) {
    transition:
        background-color 0.3s ease,
        border-color 0.3s ease,
        transform 0.3s ease,
        box-shadow 0.3s ease;
}

/* リンク付きカードへマウスを乗せた状態です。 */
.card:has(a):hover {
    background-color: #2f2f2f;
    border-color: orange;

    /* カードを少し上へ移動します。 */
    transform: translateY(-5px);

    /* オレンジ色の影を付けます。 */
    box-shadow:
        0 10px 25px
        rgba(255, 165, 0, 0.25);
}

/* カード内の画像の基本状態です。 */
.card a img {
    transition:
        transform 0.3s ease,
        opacity 0.3s ease;
}

/* カードへマウスを乗せたとき、画像を少し拡大します。 */
.card:has(a):hover img {
    opacity: 0.88;
    transform: scale(1.03);
}

/* カード内タイトルの基本状態です。 */
.card h2,
.card h3 {
    transition:
        color 0.3s ease,
        transform 0.3s ease;
}

/* カードへマウスを乗せたとき、タイトルを変化させます。 */
.card:has(a):hover h2,
.card:has(a):hover h3 {
    color: orange;
    transform: translateY(-2px);
}

/* ========================================
   ヘッダーナビゲーション
======================================== */

/* ナビゲーションボタンの動きを設定します。 */
.nav a {
    transition:
        color 0.25s ease,
        background-color 0.25s ease,
        transform 0.25s ease,
        box-shadow 0.25s ease;
}

/* ナビゲーションへマウスを乗せた状態です。 */
.nav a:hover {
    color: #000;
    background-color: orange;
    transform: translateY(-3px);

    box-shadow:
        0 6px 14px
        rgba(255, 165, 0, 0.25);
}

/* ========================================
   チケット購入ボタン
======================================== */

/* チケット購入ボタンの基本状態です。 */
.ticket-purchase-button {
    border: 2px solid orange;

    transition:
        color 0.3s ease,
        background-color 0.3s ease,
        transform 0.3s ease,
        box-shadow 0.3s ease;
}

/* チケット購入ボタンへマウスを乗せた状態です。 */
.ticket-purchase-button:hover {
    color: orange;
    background-color: transparent;

    transform: translateY(-4px);

    box-shadow:
        0 9px 22px
        rgba(255, 165, 0, 0.3);
}

/* ========================================
   お問い合わせ送信ボタン
======================================== */

/* 送信ボタンの基本状態です。 */
.contact-submit {
    transition:
        background-color 0.3s ease,
        transform 0.3s ease,
        box-shadow 0.3s ease;
}

/* 送信ボタンへマウスを乗せた状態です。 */
.contact-submit:hover {
    background-color: #ffc04d;

    transform: translateY(-3px);

    box-shadow:
        0 8px 18px
        rgba(255, 165, 0, 0.25);
}

/* ボタンを押している間の状態です。 */
.contact-submit:active,
.ticket-purchase-button:active {
    transform: translateY(0) scale(0.98);
}

/* ========================================
   SNSボタン
======================================== */

/* SNSボタンの基本状態です。 */
.social-button {
    transition:
        opacity 0.3s ease,
        transform 0.3s ease,
        box-shadow 0.3s ease;
}

/* SNSボタンへマウスを乗せた状態です。 */
.social-button:hover {
    opacity: 0.85;
    transform: translateY(-4px);

    box-shadow:
        0 8px 20px
        rgba(255, 255, 255, 0.15);
}

/* ========================================
   Topicsリンク
======================================== */

/* Topics内リンクの基本状態です。 */
.news-link {
    transition:
        color 0.25s ease,
        text-decoration-color 0.25s ease;
}

/* Topics内リンクへマウスを乗せた状態です。 */
.news-link:hover {
    color: orange;
    text-decoration-color: orange;
}

/* ========================================
   ロゴ
======================================== */

/* ヘッダーロゴの基本状態です。 */
.logo-link {
    transition:
        opacity 0.25s ease,
        transform 0.25s ease;
}

/* ロゴへマウスを乗せた状態です。 */
.logo-link:hover {
    opacity: 0.8;
    transform: scale(1.04);
}

/* ========================================
   ウェルカム画面のSKIPボタン
======================================== */

/* SKIPボタンの基本状態です。 */
.welcome-skip {
    transition:
        color 0.25s ease,
        background-color 0.25s ease,
        border-color 0.25s ease,
        transform 0.25s ease;
}

/* SKIPボタンへマウスを乗せた状態です。 */
.welcome-skip:hover {
    color: #000;
    background-color: #fff;
    border-color: #fff;
    transform: translateY(-3px);
}

/* ========================================
   キーボード操作時の表示
======================================== */

/* キーボードでリンクやボタンを選択した状態です。 */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 3px solid orange;
    outline-offset: 4px;
}
/* ========================================
   最新イベント専用スライドイン演出
======================================== */
.latest-title-slide.latest-intro-pending {
    opacity: 0;
    transform: translateX(-65px);
}

.latest-card-slide.latest-intro-pending {
    opacity: 0;
    transform: translateY(55px);
}

.latest-title-slide,
.latest-card-slide {
    transition:
        opacity 1s ease,
        transform 1s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}

.latest-title-slide.latest-intro-pending.is-visible,
.latest-card-slide.latest-intro-pending.is-visible {
    opacity: 1;
    transform: translate(0, 0);
}

.latest-card-slide {
    width: 100%;
}

@media (prefers-reduced-motion: reduce) {
    .latest-title-slide.latest-intro-pending,
    .latest-card-slide.latest-intro-pending {
        transform: none;
        transition: none;
    }
}

/* ========================================
   スクロール時のスライドイン演出
======================================== */

/*
   JavaScriptが正常に動いた場合だけ、
   対象要素を演出前の状態にします。
*/
.scroll-animation-ready .scroll-reveal {
    opacity: 0;

    transition:
        opacity 0.75s ease,
        transform 0.75s
        cubic-bezier(0.16, 1, 0.3, 1);
}

/* 下から上へ表示する要素です。 */
.scroll-animation-ready .scroll-reveal-up {
    transform: translateY(55px);
}

/* 左から右へ表示する要素です。 */
.scroll-animation-ready .scroll-reveal-left {
    transform: translateX(-65px);
}

/* 右から左へ表示する要素です。 */
.scroll-animation-ready .scroll-reveal-right {
    transform: translateX(65px);
}

/* 画面内へ入った後の状態です。 */
.scroll-animation-ready .scroll-reveal.is-visible {
    opacity: 1;
    transform: translate(0, 0);
}

/* 複数要素を少しずつ遅らせる設定です。 */
.scroll-delay-1 {
    transition-delay: 0.1s !important;
}

.scroll-delay-2 {
    transition-delay: 0.2s !important;
}

.scroll-delay-3 {
    transition-delay: 0.3s !important;
}

.scroll-delay-4 {
    transition-delay: 0.4s !important;
}

/*
   動きを減らす設定を利用している場合は、
   移動アニメーションを無効にします。
*/
@media (prefers-reduced-motion: reduce) {
    .scroll-animation-ready .scroll-reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
}


/* ========================================
   ウェルカム動画 最終設定
======================================== */
.welcome-screen {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: #000;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.welcome-screen.is-closing {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.welcome-video {
    display: block;
    width: min(85vw, 1200px);
    max-height: 85vh;
    height: auto;
    object-fit: contain;
    border-radius: 15px;
}

.welcome-skip {
    position: absolute;
    right: 24px;
    bottom: 24px;
    z-index: 2;
}

@media (max-width: 800px) {
    .welcome-screen { padding: 14px; }
    .welcome-video { width: 92vw; max-height: 80vh; border-radius: 10px; }
    .welcome-skip { right: 14px; bottom: 14px; }
}