/* =========================================
   変数定義 & リセット
   ========================================= */
:root {
    --bg-color: #0d0d0d;
    --text-main: #f0f0f0;
    --text-muted: #888;
    --gold: #c5a059;
    --font-jp-serif: 'Shippori Mincho', serif;
    --font-jp-sans: 'Noto Sans JP', sans-serif;
    --font-en: 'Cormorant Garamond', serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-jp-sans);
    line-height: 1.8;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }
img { width: 100%; height: auto; display: block; }

/* =========================================
   ローディング画面
   ========================================= */
#loading {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100vh;
    background: #000;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 1s ease, visibility 1s ease;
}
.loading-logo {
    font-family: var(--font-jp-serif);
    font-size: 2rem;
    color: var(--gold);
    letter-spacing: 0.5em;
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0% { opacity: 0.5; }
    50% { opacity: 1; }
    100% { opacity: 0.5; }
}
body.loaded #loading {
    opacity: 0;
    visibility: hidden;
}

/* =========================================
   ヘッダー
   ========================================= */
header {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    mix-blend-mode: difference; /* 背景が白でも黒でも見えるように */
    color: #fff;
}
.logo {
    font-family: var(--font-en);
    font-size: 1.5rem;
    letter-spacing: 0.1em;
    font-weight: 600;
}
nav ul {
    display: flex;
    gap: 40px;
    align-items: center;
}
nav a {
    font-family: var(--font-en);
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    position: relative;
}
nav a::after {
    content: '';
    position: absolute;
    bottom: -5px; left: 0;
    width: 0; height: 1px;
    background: var(--gold);
    transition: 0.3s;
}
nav a:hover::after { width: 100%; }

.reserve-btn a {
    border: 1px solid #fff;
    padding: 10px 25px;
    transition: 0.3s;
}
.reserve-btn a:hover {
    background: #fff;
    color: #000;
}

/* =========================================
   ヒーローセクション
   ========================================= */
#hero {
    position: relative;
    height: 100vh;
    width: 100%;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero-bg {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    /* 煙と炭火のイメージ画像 */
    background: url('焼肉屋内装.png') no-repeat center/cover;
    z-index: -1;
    transform: scale(1.1);
    animation: zoomOut 20s linear infinite alternate;
}
/* 画像をゆっくり動かすアニメーション */
@keyframes zoomOut {
    from { transform: scale(1.2); }
    to { transform: scale(1.0); }
}
/* 暗くするオーバーレイ */
#hero::after {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.4);
    z-index: -1;
}

.hero-content {
    text-align: center;
    color: #fff;
}
.hero-sub {
    font-family: var(--font-en);
    letter-spacing: 0.2em;
    font-size: 1rem;
    margin-bottom: 20px;
    color: var(--gold);
    opacity: 0;
    animation: fadeUp 1s ease 1s forwards;
}
.hero-title {
    font-family: var(--font-jp-serif);
    font-size: 4.5rem;
    line-height: 1.4;
    letter-spacing: 0.1em;
    opacity: 0;
    animation: fadeUp 1s ease 1.5s forwards;
}

/* スクロールダウン誘導 */
.scroll-down {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    color: #fff;
    font-family: var(--font-en);
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    opacity: 0;
    animation: fadeIn 1s ease 2.5s forwards;
}
.scroll-down .line {
    width: 1px;
    height: 60px;
    background: rgba(255,255,255,0.3);
    position: relative;
    overflow: hidden;
}
.scroll-down .line::after {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: #fff;
    transform: translateY(-100%);
    animation: scrollLine 2s cubic-bezier(0.77, 0, 0.175, 1) infinite;
}
@keyframes scrollLine {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

/* =========================================
   共通クラス & アニメーション
   ========================================= */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}
.section-padding { padding: 120px 0; }

/* Scroll Fade Animation */
.scroll-fade {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.scroll-fade.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}
.en-title {
    display: block;
    font-family: var(--font-en);
    color: var(--gold);
    letter-spacing: 0.2em;
    margin-bottom: 10px;
}
.jp-title {
    font-family: var(--font-jp-serif);
    font-size: 2.5rem;
}

/* =========================================
   コンセプト（縦書き）
   ========================================= */
#concept { padding: 150px 0; }
.concept-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 80px;
    flex-direction: row-reverse; /* 画像を右、文字を左に */
}
.concept-image {
    width: 500px;
    height: 600px;
    background-size: cover;
    background-position: center;
    box-shadow: 20px 20px 0px rgba(255,255,255,0.05); /* 高級感のある枠 */
}
.concept-text {
    writing-mode: vertical-rl; /* 縦書き */
    height: 500px;
}
.vertical-title {
    font-family: var(--font-jp-serif);
    font-size: 2rem;
    letter-spacing: 0.3em;
    margin-left: 60px;
    line-height: 2;
    color: var(--gold);
}
.vertical-desc {
    font-size: 0.95rem;
    line-height: 2.2;
    color: #ccc;
    letter-spacing: 0.1em;
}

/* =========================================
   パララックスバナー
   ========================================= */
.parallax-banner {
    width: 100%;
    height: 400px;
    background-attachment: fixed; /* パララックスの鍵 */
    background-position: center;
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}
.parallax-banner .overlay {
    background: rgba(0,0,0,0.6);
    width: 100%; height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}
.parallax-banner h3 {
    font-family: var(--font-en);
    font-size: 3rem;
    color: #fff;
    letter-spacing: 0.2em;
}

/* =========================================
   メニュー
   ========================================= */
.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}
.menu-card {
    background: #151515;
    transition: 0.4s;
    cursor: pointer;
}
.menu-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
.card-img {
    height: 250px;
    overflow: hidden;
}
.card-img img {
    transition: 0.5s;
}
.menu-card:hover .card-img img {
    transform: scale(1.1);
}
.card-info {
    padding: 30px;
    text-align: center;
}
.card-info h4 {
    font-family: var(--font-jp-serif);
    font-size: 1.2rem;
    margin-bottom: 10px;
}
.card-info .price {
    font-family: var(--font-en);
    color: var(--gold);
    font-size: 1.4rem;
    margin-bottom: 10px;
}
.card-info .desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}
.view-more {
    display: inline-block;
    margin-top: 60px;
    border: 1px solid var(--gold);
    color: var(--gold);
    padding: 15px 50px;
    font-family: var(--font-en);
    letter-spacing: 0.2em;
    font-size: 0.9rem;
}
.view-more:hover {
    background: var(--gold);
    color: #000;
}
.btn-center { text-align: center; }

/* =========================================
   アクセス
   ========================================= */
.access-layout {
    display: flex;
    align-items: center;
    gap: 60px;
}
.access-info { flex: 1; }
.access-img { flex: 1; height: 400px; }
.access-img img {
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    transition: 0.5s;
}
.access-layout:hover .access-img img { filter: grayscale(0%); }

.access-info dl {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 20px 0;
    margin-bottom: 40px;
    font-size: 0.95rem;
    border-top: 1px solid #333;
    padding-top: 30px;
}
.access-info dt {
    font-family: var(--font-en);
    color: var(--gold);
    letter-spacing: 0.1em;
}
.map-link {
    border-bottom: 1px solid #fff;
    padding-bottom: 5px;
}

/* =========================================
   フッター
   ========================================= */
footer {
    border-top: 1px solid #222;
    padding: 50px 0;
    text-align: center;
    font-family: var(--font-en);
}
.footer-logo {
    font-size: 1.5rem;
    letter-spacing: 0.2em;
    margin-bottom: 20px;
    color: #555;
}
.copyright {
    font-size: 0.7rem;
    color: #444;
}

/* アニメーション用キーフレーム定義（fadeIn, fadeUp） */
@keyframes fadeIn { from {opacity: 0;} to {opacity: 1;} }
@keyframes fadeUp { from {opacity: 0; transform: translateY(20px);} to {opacity: 1; transform: translateY(0);} }

/* レスポンシブ対応 */
@media (max-width: 768px) {
    header { padding: 15px 20px; }
    nav { display: none; } /* ハンバーガーメニュー未実装時は非表示推奨 */
    .hero-title { font-size: 2.5rem; }
    .concept-container { flex-direction: column; text-align: center; }
    .concept-text { writing-mode: horizontal-tb; height: auto; text-align: left; }
    .vertical-title { margin-left: 0; margin-bottom: 30px; border-bottom: 1px solid var(--gold); padding-bottom: 10px; display: inline-block;}
    .concept-image { width: 100%; height: 300px; }
    .access-layout { flex-direction: column-reverse; }
    .access-img { width: 100%; height: 250px; }
}