@charset "UTF-8";

/* =========================================
   VARIABLES
========================================= */
:root {
    --main-color: #1A7FF3;
    /* 鮮やかな青 */
    --accent-color: #4CECF7;
    /* 明るい水色 */
    --bule-color: rgba(26, 127, 243, 0.85);
    --bg-color: #ffffff;
    --text-color: #2c3e50;
    --light-blue: #8dd1ff;
    /* セクション背景用 */
    --font-family: 'Zen Maru Gothic', sans-serif;

    /* タイポグラフィ計算 */
    --font-base: clamp(15px, 3.5vw, 17px);
    --font-h1: clamp(2.5rem, 6vw, 3.5rem);
    --font-h2: clamp(1.5rem, 4vw, 2.5rem);
    --font-h3: clamp(1.2rem, 4vw, 1.5rem);

    --radius-l: 30px;
    --radius-xl: 40px;

    --space-s: 20px;
    --space-m: 10px;
    --space-l: 80px;
    --space-xl: 120px;

    color-scheme: light;
    /* ダークモードを無効化し、ライトモードを強制 */
}


/* =========================================
   RESET & BASE (Mobile First)
========================================= */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    color: var(--text-color);
    background-color: var(--bg-color);
    font-size: var(--font-base);
    line-height: 1.8;
    letter-spacing: 0.05em;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

h1,
h2,
h3 {
    color: var(--main-color);
    line-height: 1.4;
    font-weight: 900;
}

h2 {
    font-size: var(--font-h2);
    margin-bottom: var(--space-m);
}

p {
    margin-bottom: var(--space-s);
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    width: 90%;
    max-width: 600px;
    margin: 0 auto;
    padding: var(--space-xl) 0;
}

.container-large {
    max-width: 1000px;
}

.center-title {
    text-align: center;
    margin-bottom: var(--space-s);
}

/* =========================================
   LOADING SCREEN (Progress Bar)
========================================= */
.loader-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--light-blue);
    /* GSAPで全体コンテナを非表示にするとき用 */
}

/* カーテン（左右に開く演出用） */
.loader-curtain_l {
    position: absolute;
    top: 0;
    width: 50%;
    height: 100%;
    background-image: url("accets/images/open-l.jpg");
    background-size: cover;
    z-index: 10000;
}

.loader-curtain_l.left {
    left: 0;
    transform-origin: left;
}

@media (max-width: 768px) {
    .loader-curtain_l {
        position: absolute;
        top: 0;
        right: 0;
        width: 50%;
        height: 100%;
        background-image: url("accets/images/open_s_l.jpg");
        background-size: cover;
        z-index: 10000;
    }
}

.loader-curtain_r {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background-image: url("accets/images/open-r.jpg");
    background-size: cover;
    z-index: 10000;
}

@media (max-width: 768px) {
    .loader-curtain_r {
        position: absolute;
        top: 0;
        width: 50%;
        height: 100%;
        background-image: url("accets/images/open_s_r.jpg");
        background-size: cover;
        z-index: 10000;
    }
}

.loader-curtain_r.right {
    right: 0;
    transform-origin: right;
}

.loader-content {
    position: relative;
    z-index: 10001;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    width: 80%;
    max-width: 300px;
}

.loader-logo {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--bg-color);
}

.progress-wrap {
    width: 100%;
    height: 4px;
    background-color: rgba(26, 127, 243, 0.2);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.progress-bar {
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background-color: var(--bg-color);
    border-radius: 4px;
}

.progress-text {
    font-size: 1.2rem;
    font-weight: 900;
    color: var(--bg-color);
    font-feature-settings: "tnum";
    font-variant-numeric: tabular-nums;
}


/* =========================================
   HEADER
========================================= */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    padding: 0 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    z-index: 1000;
}

.logo {
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--main-color);
    letter-spacing: 0;
}

.nav {
    position: fixed;
    top: 0;
    right: -100%;
    /* 初期は画面右外 */
    width: 100%;
    height: 100vh;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: right 0.5s cubic-bezier(0.77, 0, 0.175, 1);
    z-index: 999;
}

.nav.is-open {
    right: 0;
}

.nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 30px;
    text-align: center;
}

.nav a {
    color: var(--main-color);
    font-weight: 700;
    font-size: 1.4rem;
    position: relative;
    padding: 5px 0;
    display: inline-block;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s;
}

.nav a:hover::after {
    width: 100%;
}

.menu-trigger {
    background: none;
    border: none;
    width: 30px;
    height: 24px;
    position: relative;
    display: block;
    cursor: pointer;
    z-index: 1001;
    /* ナビメニューより上に */
}

.menu-trigger span {
    position: absolute;
    width: 100%;
    height: 3px;
    background-color: var(--main-color);
    left: 0;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.menu-trigger span:nth-child(1) {
    top: 0;
}

.menu-trigger span:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

.menu-trigger span:nth-child(3) {
    bottom: 0;
}

/* Burger Open State (X) */
.menu-trigger.is-open span:nth-child(1) {
    transform: translateY(10.5px) rotate(45deg);
}

.menu-trigger.is-open span:nth-child(2) {
    opacity: 0;
}

.menu-trigger.is-open span:nth-child(3) {
    transform: translateY(-10.5px) rotate(-45deg);
}

/* =========================================
   SVG CURVES (ディバイダー)
========================================= */
.curve-divider {
    position: absolute;
    width: 100%;
    height: 8vw;
    min-height: 50px;
    max-height: 120px;
    left: 0;
    line-height: 0;
    z-index: 10;
}

.curve-bottom {
    bottom: -1px;
}

.curve-top {
    top: -1px;
    transform: translateY(-99%);
}

.curve-divider svg {
    width: 100%;
    height: 100%;
    display: block;
}

.curve-divider.white .shape-fill {
    fill: var(--bg-color);
}

.curve-divider.light-blue .shape-fill {
    fill: var(--accent-color);
}

.curve-divider.blue .shape-fill {
    fill: var(--main-color);
}

/* =========================================
   1. HERO SECTION (Scrub Parallax)
========================================= */
.hero {
    position: relative;
    height: 100svh;
    /* スマホのアドレスバー考慮 */
    min-height: 600px;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    overflow: hidden;
    padding-top: 70px;
    /* ヘッダー分 */
    background-image: url(accets/images/bg2.jpg);
    /* opacity: 0.5; */
    background-size: cover;
    background-position: center;
}

/* Scrub用の背景レイヤー */
.hero-bg {
    position: absolute;
    top: -15%;
    left: -10%;
    width: 120%;
    height: 130%;
    /* 余裕を持たせる */
    object-fit: cover;
    will-change: transform;
}

.hero-bg.level-bg {
    z-index: 1;
    /* JSでY軸を動かす */
}

.hero-bg.level-light {
    background: linear-gradient(180deg, rgb(255, 209, 156) 0%, #1A7FF3 80%, #1A7FF3 100%);
    z-index: 2;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 15;
    /* background: rgba(255, 255, 255, 0.95); */
    /* background-image: url(accets/images/hero.jpg); */
    /* opacity: 0.5; */
    background-size: cover;
    padding: var(--space-m) var(--space-s);
    border-radius: var(--radius-xl);
    /* box-shadow: 0 20px 40px rgba(26, 127, 243, 0.15); */
    width: 90%;
    max-width: 500px;
    will-change: transform, opacity;
}

.hero-title {
    font-size: var(--font-h1);
    margin-bottom: 5px;
}

.hero-subtitle {
    font-size: clamp(1rem, 4vw, 1.4rem);
    font-weight: 700;
    color: var(--bg-color);
}

/* GSAPテキストアニメーション用の分割スパン設定 */
.js-split-text span {
    display: inline-block;
    opacity: 0;
    transform: translateY(20px);
}

/* 浮遊お魚 */
.floating-fish {
    position: absolute;
    z-index: 5;
    width: 25vw;
    height: 25vw;
    max-width: 150px;
    max-height: 150px;
    min-width: 80px;
    min-height: 80px;
    border-radius: 50%;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    opacity: 0.4;
}

.fish-1 {
    top: 20%;
    left: 5%;
    animation: float 6s ease-in-out infinite;
}

.fish-2 {
    bottom: 25%;
    right: 5%;
    animation: float 8s ease-in-out infinite alternate;
}

@keyframes float {
    0% {
        transform: translateY(0) rotate(-2deg);
    }

    50% {
        transform: translateY(-30px) rotate(5deg);
    }

    100% {
        transform: translateY(0) rotate(-2deg);
    }
}

/* =========================================
   2. INTRO SECTION (Pinning & Stepped Image)
========================================= */
.intro-section {
    /* background-color: var(--accent-color); */
    background: linear-gradient(180deg, #4CECF7, #709dff);
    position: relative;
    /* JSでピン留めするため、高さを調整しやすいように。
       Pinning時に高さが伸びるので、基本は通常の高さをとる */
}

.intro-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-m);
    /* スマホ画面中央に要素を保持 */
    min-height: 80vh;
    justify-content: center;

}

.intro-text {
    text-align: left;
    z-index: 10;
}

.intro-desc {
    margin-top: var(--space-s);
}

.intro-gallery {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 3;
    border-radius: var(--radius-l);
    overflow: hidden;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.15);
}

.gallery-photo {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #000;
}

.gallery-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 1枚目以外クリッピングで隠す（JSでマスクを開く演出） */
.gallery-photo.photo-2,
.gallery-photo.photo-3 {
    clip-path: polygon(0 100%, 100% 100%, 100% 100%, 0 100%);
    /* カーテンのように下から */
}


/* =========================================
   2.5 PREMIUM SHOWCASE (Pin & Scrub)
========================================= */
.premium-section {
    position: relative;
    height: 100vh;
    min-height: 800px;
    display: flex;
    justify-content: center;
    align-items: center;
    /* overflow: hidden; */
    background-color: #ffffff;
    /* JSで#051d3bへ変化 */
    transition: color 0.5s ease;
}

/* 背景が暗くなった時にテキストを白にするクラス */
.premium-section.is-dark,
.premium-section.is-dark h2 {
    color: #ffffff;
}

.premium-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.premium-content {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.center-image-wrap {
    position: relative;
    width: 50vw;
    height: 50vw;
    max-width: 350px;
    max-height: 350px;
    border-radius: 50%;
    /* 円形くり抜き */
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
    margin-bottom: var(--space-m);
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.center-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    transform: scale(1.5);
    /* 初期スケール。JSで1.0へ */
    transform-origin: center center;
}

.premium-line {
    position: absolute;
    top: -15px;
    left: -15px;
    width: calc(100% + 30px);
    height: calc(100% + 30px);
    pointer-events: none;
    transform: rotate(-90deg);
    /* 描画開始位置を上（12時）に */
}

.premium-text {
    z-index: 10;
}

.premium-text h2 {
    font-size: var(--font-h2);
    margin-bottom: var(--space-s);
    transition: color 0.5s ease;
}

.premium-text p {
    font-size: 1.1rem;
    font-weight: 500;
}

/* SplitTypeによる分割テキストの調整 */
.js-split-premium {
    line-height: 1.4;
}

.js-split-premium .word {
    /* 単語ごとの改行崩れを防ぐ */
    display: inline-block;
}

.js-split-premium .char {
    display: inline-block;
    /* JSで透過＆Y移動させる */
}


/* =========================================
   3. MAIN TANK (Z-Depth 3D Animation)
========================================= */
.main-tank-section {
    /* background-color: var(--main-color); */
    background: linear-gradient(180deg, #0c1d33, #0062d3 40%, #1A7FF3 100%);
    color: #fff;
    padding: var(--space-xl) 0;
    /* overflow: hidden; */
}

.main-tank-section h2 {
    color: #fff;
}

.tank-title-area {
    text-align: center;
    padding: 0 5%;
    margin-bottom: 10px;
}

/* 3Dビューポート（パースペクティブの基準） */
.z-depth-viewport {
    width: 100%;
    height: 70vh;
    perspective: 1200px;
    overflow: hidden;
    position: relative;
}

/* 3Dステージ（transform-style: preserve-3dで子要素に3D空間を適用） */
.z-depth-stage {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
}

/* 各スライド（重なり合って中央に配置） */
.z-depth-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    /* 初期状態: 画面下方に隠れている */
    opacity: 0;
    transform: translateY(100%) translateZ(0px);
    will-change: transform, opacity;
}

/* 最初のスライドのみ表示 */
.z-depth-slide.is-active {
    opacity: 1;
    transform: translateY(0%) translateZ(0px);
}

.slide-img-wrap {
    width: 75%;
    max-width: 600px;
    height: 80%;
    border-radius: var(--radius-l);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    position: relative;
}

.slide-img {
    width: 100%;
    height: 100%;
    max-width: none;
    object-fit: cover;
}

.slide-deco {
    position: absolute;
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(8px);
    padding: 10px 24px;
    border-radius: 50px;
    z-index: 10;
    bottom: 15%;
    right: 15%;
}



/* =========================================
   4. BOOTHS (Stagger Cards)
========================================= */
.booths-section {
    /* background-color: var(--light-blue); */
    background: linear-gradient(180deg, #ffffff, #8dd1ff 40%, #ffffff 100%);
    position: relative;
    padding: calc(var(--space-xl) * 1.5) 0;
    /* ディバイダーの分多めに */
}

.booth-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-m);
}

.booth-card {
    background: #fff;
    border-radius: var(--radius-l);
    overflow: hidden;
    /* 画像のはみ出し防止 */
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.06);
    /* 初期状態（JSで制御するのでここでは設定しないか透明に） */
    opacity: 0;
    transform: translateY(30px);
}

.card-img-wrap {
    position: relative;
    width: 100%;
    padding-top: 60%;
    /* アスペクト比 */
    overflow: hidden;
}

.card-img-wrap img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.booth-card:hover .card-img-wrap img {
    transform: scale(1.08);
    /* ホバー時の微細な動き */
}

.card-body {
    padding: var(--space-m) var(--space-s);
    text-align: center;
}

.card-body h3 {
    margin-bottom: 10px;
}


/* =========================================
   5. SHOW SECTION (Dynamic Scrub)
========================================= */
.show-section {
    position: relative;
    padding: var(--space-xl) 0;
    color: #fff;
    background-color: #1A7FF3;
    /* overflow: hidden; */
    /* ジャンプのおさまり */
}

/* スクラブで背景位置を動かすための設定 */
.show-bg {
    position: absolute;
    top: -20%;
    left: -10%;
    width: 120%;
    height: 140%;
    background: url('https://images.unsplash.com/photo-1549479366-0d12e95a1dc3?auto=format&fit=crop&q=80&w=1600') center/cover no-repeat;
    z-index: 1;
}

.show-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 127, 243, 0.85);
    /* 青オーバーレイ */
    z-index: 2;
}

.show-container {
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    gap: var(--space-m);
}

.show-text {
    text-align: center;
}

.show-text h2 {
    color: #fff;
}

.btn-more {
    display: inline-block;
    padding: 16px 40px;
    background-color: var(--accent-color);
    color: #222;
    font-weight: 900;
    font-size: 1rem;
    border-radius: 50px;
    margin-top: var(--space-m);
    box-shadow: 0 10px 25px rgba(76, 236, 247, 0.5);
    transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.btn-more:hover {
    transform: translateY(-5px) scale(1.05);
    background-color: #ffffff;
    box-shadow: 0 15px 30px rgba(255, 255, 255, 0.5);
}

.show-image-area {
    position: relative;
    width: 100%;
    height: 350px;
    margin-top: 50px;
}

.show-dolphin {
    position: absolute;
    bottom: -100px;
    /* 画面外下部から */
    left: 5%;
    width: 90%;
    border-radius: var(--radius-l);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
    z-index: 5;
}

.splash-deco {
    position: absolute;
    top: 20%;
    right: 0;
    font-size: 2rem;
    font-weight: 900;
    color: var(--accent-color);
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    z-index: 6;
}


/* =========================================
   6. CAROUSEL SECTION (Scroll-Driven / Immersive Parallax)
========================================= */
.carousel-section {
    background: linear-gradient(180deg, #FFFFFF 0%, #e8f4fd 30%, #d0ecfa 70%, var(--light-blue) 100%);
    padding: var(--space-s) 0 var(--space-s);
    overflow: hidden;
    position: relative;
}

.carousel-header {
    text-align: center;
    padding: 0 5%;
    margin-bottom: var(--space-s);
}

.carousel-subtitle {
    font-size: clamp(0.9rem, 3vw, 1.1rem);
    color: var(--main-color);
    font-weight: 500;
    opacity: 0.7;
}

/* 横スクロールトラック */
.carousel-track-wrapper {
    width: 100%;
    overflow: hidden;
    position: relative;
}

.carousel-track {
    display: flex;
    gap: 20px;
    padding: 30px 5% 40px;
    /* GSAPで横移動させる (transform: translateX) */
    will-change: transform;
}

/* 各スライド */
.carousel-slide {
    flex: 0 0 80vw;
    max-width: 500px;
    min-width: 280px;
    height: 55vh;
    min-height: 300px;
    max-height: 500px;
    border-radius: var(--radius-l);
    overflow: hidden;
    position: relative;
    box-shadow: 0 20px 50px rgba(26, 127, 243, 0.15);
    transition: box-shadow 0.4s ease;
}

.carousel-slide:hover {
    box-shadow: 0 30px 70px rgba(26, 127, 243, 0.28);
}

/* パララックス画像コンテナ */
.slide-parallax-img {
    position: absolute;
    top: -20%;
    left: -5%;
    width: 110%;
    height: 140%;
    will-change: transform;
}

.slide-parallax-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* キャプション */
.slide-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 50px 20px 20px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.65) 0%, rgba(0, 0, 0, 0.0) 100%);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 10;
}

.caption-icon {
    font-size: 1.6rem;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.caption-text {
    color: #fff;
    font-size: clamp(0.95rem, 3vw, 1.15rem);
    font-weight: 700;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    letter-spacing: 0.04em;
}

/* スクロール進捗バー */
.carousel-progress {
    width: 60%;
    max-width: 300px;
    height: 4px;
    background: rgba(26, 127, 243, 0.15);
    border-radius: 4px;
    margin: 30px auto 0;
    overflow: hidden;
}

.carousel-progress-bar {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--main-color), var(--accent-color));
    border-radius: 4px;
    will-change: width;
}


/* =========================================
   7. GREETING SECTION
========================================= */
.greeting-section {
    padding: var(--space-l) 0 calc(var(--space-xl) * 1.5);
    background-image: url(accets/images/aisatsu.jpg);
    background-size: cover;
    background-position: center;
}

.greeting-card {
    background-image: url(accets/images/hero.jpg);
    background-size: cover;
    padding: var(--space-s) var(--space-s);
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 50px rgba(26, 127, 243, 0.08);
    text-align: center;
}

.greeting-card h2 {
    margin-bottom: var(--space-s);
}

.greeting-name {
    margin-top: var(--space-m);
    font-weight: 900;
    font-size: 1.2rem;
    color: var(--main-color);
}

/* =========================================
   FOOTER
========================================= */
.footer {
    background-color: var(--main-color);
    color: #fff;
    text-align: center;
    padding: var(--space-m);
    font-size: 0.9rem;
    font-weight: 700;
}


/* =========================================
   MEDIA QUERIES (PC / Desktop 展開)
========================================= */
@media (min-width: 768px) {

    /* コンテナの幅展開 */
    .container {
        max-width: 1000px;
    }

    /* ヘッダー */
    .menu-trigger {
        display: none;
    }

    .nav {
        display: block;
        position: static;
        width: auto;
        height: auto;
        background: none;
        backdrop-filter: none;
        z-index: auto;
    }

    .nav ul {
        flex-direction: row;
        gap: 3vw;
    }

    .nav a {
        font-size: 0.95rem;
    }

    .hero-content {
        padding: var(--space-l) var(--space-xl);
        max-width: 800px;
    }

    /* イントロ (左右に分離) */
    .intro-container {
        flex-direction: row;
        align-items: center;
    }

    .intro-text,
    .intro-gallery {
        flex: 1;
    }

    .intro-gallery {
        height: 500px;
    }

    /* メイン水槽 (Z-Depth) */
    .z-depth-viewport {
        height: 50vh;
    }


    /* ブースカードのグリッド展開 */
    .booth-grid {
        flex-direction: row;
        justify-content: space-between;
    }

    .booth-card {
        flex: 1;
        width: 31%;
        /* 計算マージン */
    }

    /* ショーの左右配置 */
    .show-container {
        flex-direction: row;
        align-items: center;
    }

    .show-text,
    .show-image-area {
        flex: 1;
    }

    .show-text {
        text-align: left;
    }

    .show-image-area {
        height: 500px;
        margin-top: 0;
    }

    .show-dolphin {
        width: 100%;
        left: 0;
    }

    /* グリーティング幅 */
    .greeting-card {
        max-width: 500px;
        margin: 0 auto;
        padding: var(--space-s);
    }

}

/* =========================================
   UTILITY & ANIMATION STATES
========================================= */
.js-fade-up {
    opacity: 0;
    transform: translateY(30px);
}

/* =========================================
   PAGE TOP BUTTON
========================================= */
.page-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--accent-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.page-top-btn.is-active {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.page-top-btn:hover {
    background-color: var(--main-color);
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(26, 127, 243, 0.4);
}

.page-top-btn svg {
    transition: transform 0.3s ease;
}

.page-top-btn:hover svg {
    transform: translateY(-3px);
}