/* ===================================
   CSS変数定義
=================================== */
:root {
    /* カラー */
    --color-white: #FFFFFF;
    --color-black: #0D0D0D;
    --color-red: #E50000;
    --color-red-dark: #BA0606;
    --color-gray: #999;
    --color-gray-dark: #333;
    
    /* グラデーション */
    --gradient-red: linear-gradient(90deg, var(--color-red) 0%, var(--color-red-dark) 100%);
    
    /* フォント */
    --font-serif: "fot-matisse-pron", sans-serif;
    --font-sans: 'Noto Sans JP', sans-serif;
    
    /* サイズ */
    --container-width: 1100px;
    --header-height: 60px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-black);
    background-color: var(--color-white);
    line-height: 1.8;
    color: var(--color-white);
    overflow-x: hidden;
}

h1,h2,h3,h4,h5,a{
    font-family: var(--font-serif);
}

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

a {
    text-decoration: none;
    transition: opacity 0.3s ease;
    color: var(--color-white);
    cursor: pointer;
}

a:hover {
    opacity: 0.7;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 5%;
    box-sizing: content-box;
    position: relative;
    z-index: 1;
}

.d_none{
    display: none;
}

@media (max-width: 1024px) {
    .d_block_tb{
        display: block;
    }
}

@media (max-width: 767px) {
    .d_block_sp{
        display: block;
    }
}


/* ===================================
   ローディング画面
=================================== */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--color-black);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.loading.loaded {
    opacity: 0;
    visibility: hidden;
}

.loading-logo {
    font-family: var(--font-serif);
    font-size: clamp(20px, 3vw, 30px);
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--color-white);
    animation: fadeInOut 2s ease-in-out infinite;
}

@keyframes fadeInOut {
    0%, 100% {
        opacity: 0.3;
    }
    50% {
        opacity: 1;
    }
}

/* ===================================
   ヘッダー（スクロール後表示）
=================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgb(13 13 13 / 90%);
    color: var(--color-white);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s ease;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
}

.header.visible {
    opacity: 1;
    visibility: visible;
}

.header-container {
    margin: 0 auto;
    padding: 15px 5%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-logo a {
    font-family: var(--font-serif);
    font-size: clamp(18px, 2.5vw, 38px);
    font-weight: 500;
    letter-spacing: 0.05em;
}
.header-nav ul {
    display: flex;
    gap: 25px;
    list-style: none;
    align-items: center;
}

.header-nav a {
    font-size: 16px;
    font-weight: 400;
    letter-spacing: 0.05em;
    white-space: nowrap;
    font-family: var(--font-serif);
}

.header-sns svg {
    width: 30px;
    height: 30px;
    fill: var(--color-white);
    margin: 5px 0 0 10px;
}

/* ハンバーガーメニュー */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
    position: relative;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--color-white);
    transition: all 0.3s ease;
}

.menu-terms {
    display: none;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* 1270px以下でハンバーガー表示 */
@media (max-width: 1270px) {
    .hamburger {
        display: flex;
    }
    .menu-terms {
        display: block;
    }
    
    .header-nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgb(13 13 13 / 98%);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
        padding: 100px 5%;
        overflow-y: auto;
        z-index: 1000;
    }
    
    .header-nav.active {
        opacity: 1;
        visibility: visible;
    }
    
    .header-nav ul {
        flex-direction: column;
        gap: 30px;
        align-items: center;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .header-nav a {
        font-size: 16px;
    }
    
    .header-sns {
        margin-top: 30px;
    }
    
    .header-sns svg {
        width: 40px;
        height: 40px;
    }
}

/* タブレット以下：TOPページのみヘッダー常時表示 */
@media (max-width: 1024px) {
    body:has(#top-page) .header {
        opacity: 1;
        visibility: visible;
        background-color: transparent;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        transition: background-color 0.3s ease, backdrop-filter 0.3s ease;
    }
    
    body:has(#top-page) .header.visible {
        background-color: rgb(13 13 13 / 90%);
        backdrop-filter: blur(3px);
        -webkit-backdrop-filter: blur(3px);
    }
    
    body:has(#top-page) .header .header-logo {
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }
    
    body:has(#top-page) .header.visible .header-logo {
        opacity: 1;
        visibility: visible;
    }
    
    /* ハンバーガーメニューは常に表示 */
    body:has(#top-page) .hamburger {
        opacity: 1;
        visibility: visible;
        z-index: 1001;
    }
    
    /* メニューのz-indexを確保 */
    body:has(#top-page) .header-nav {
        z-index: 1000;
    }

        
    .header-nav a {
        font-size: 20px;
    }
}

/* ===================================
背景設定
=================================== */

main {
    position: relative;
    background: linear-gradient(254deg, rgb(13 13 13 / 80%) 0%, rgb(13 13 13 / 80%) 80%, rgb(229 0 0 / 80%) 100%);
}
main::before {
    content: '';
    position: fixed;
    top: 50%;
    left: 50%;
    width: 101%;
    height: 101%;
    background-image: url(../img/fv.jpg);
    background-size: cover;
    background-position: center;
    z-index: -1;
    filter: blur(5px);
    -webkit-filter: blur(5px);
    pointer-events: none;
    transform: translate(-50%, -50%);
}

/* 下層背景グラデ右 */
.under-page{
    position: relative;
}

.under-page::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(123deg, rgb(13 13 13 / 0%) 0%, rgb(229 0 0 / 0%) 80%, rgb(229 0 0 / 90%) 120%);
    z-index: 0;
    pointer-events: none;
}

/* ===================================
   フッター
=================================== */
.footer {
    background: linear-gradient(314deg, #e50000 -30%, #0d0d0d 30%);
    color: var(--color-white);
    position: relative;
    z-index: 0;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 120%;
    background: radial-gradient(circle, rgb(229 0 0 / 60%) 0%, #0d0d0d 40%);
    left: 0%;
    top: 0%;
    transform: translate(-50%, 0%);
    z-index: -1;
    pointer-events: none;
}

.footer-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 100px 5%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    box-sizing: content-box;
}

.footer-map {
    width: 100%;
    height: 300px;
    overflow: hidden;
}

.footer-map iframe{
    filter: grayscale(100%);
    -webkit-filter: grayscale(100%);
  }

.footer-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.footer-title {
    font-family: var(--font-serif);
    font-size: clamp(20px,3vw,32px);
    font-weight: 400;
    letter-spacing: 0.1em;
    margin-bottom: 10px;
}

.footer-address {
    font-size: clamp(14px,1vw,20px);
    line-height: 1.5;
    margin-bottom: 30px;
    font-family: var(--font-serif);
}

.footer-nav a {
    font-size: 14px;
    text-decoration: underline;
}

.footer-copyright {
    text-align: center;
    font-size: 12px;
    color: var(--color-white);
    padding:20px 0;
    margin: 0 auto;
    background: var(--gradient-red);
}

/* ===================================
   フェードインアニメーション
=================================== */

/* 初期状態（非表示） */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

/* 表示状態 */
.fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}


/* ===================================
下層ページタイトル
=================================== */

.page-title {
    position: relative;
    padding-bottom: 15px; /* 線とタイトルの間隔 */
    font-family: var(--font-serif);
    font-size: clamp(25px, 3vw, 32px);
    text-align: center;
    margin-bottom: 70px;
    letter-spacing: 0.1em;
}

/* 赤い線の装飾 */
.page-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px; /* 線の長さ */
    height: 2px; /* 線の太さ */
    background: var(--gradient-red);
    pointer-events: none;
}

.under-page {
    padding: 180px 0 ;
}