@charset "UTF-8";

/* =========================================
   HEADER MAIN STRUCTURE
   ========================================= */
/* 外枠：位置とサイズの固定、パフォーマンス最適化 */
.mn-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    max-width: 100%;
    z-index: 2100;
    
    /* 高さ固定 (スクロール時のガタつき防止) */
    height: var(--header-height);
    min-height: var(--header-height);    
    /* レイアウト初期化 */
    padding: 0; 
    box-sizing: border-box;

    /* テーマ設定 */
    background-color: var(--mn-header-bg);
    color: var(--mn-header-text);


    /* パフォーマンス設定（チラつき防止） */
    will-change: transform, background-color;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    
    /* アニメーション（高さheightは含めないこと！） */
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
                background-color 0.3s ease; 
    transform: translateY(0);
}


/* =========================================
   HEADER THEME PRESETS
   Currently unused — reserved for future theme switching
   ========================================= */


.mn-header[data-theme="dark"] {
    --mn-header-bg: #111;
    --mn-header-text: #eee;
}

.mn-header[data-theme="gold"] {
    --mn-header-bg: #faf6ea;
    --mn-header-text: #6b4e16;
}

.mn-header[data-theme="glass"] {
    --mn-header-bg: rgba(255,255,255,.6);
    backdrop-filter: blur(12px);
}



/* フッター到達時に隠すクラス */
.mn-header.mn-hidden {
    transform: translateY(-100%);
}

/* メニュー展開時のスタイル（背景塗りつぶし） */
.mn-header.is-menu-open {
    background-color: var(--mn-header-menu-bg) !important;
    box-shadow: none !important;
    transform: translateY(0) !important;
}

/* スクロール時のスタイル（白背景のみ適用・高さ変化なし） */
.mn-header.is-scrolled {
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 10px rgba(0, 0, 0, 0.05);
}

.mn-header.is-menu-open .mn-header-center {
    opacity: 0;
    pointer-events: none;
    background-color: var(--mn-header-menu-bg) !important;
}

.mn-prog-col > a {
  text-decoration: none;
  color: inherit;
  display: inline-block;
}

/* =========================================
   HEADER INNER LAYOUT
   ========================================= */
/* コンテンツの配置（Bootstrap containerの中身） */
.header-inner {

    width: 100%;

    /* ★これを追加 */
    height: var(--header-height);

    display: flex;
    align-items: center;
    justify-content: space-between;

    position: relative;

    transition: height .35s cubic-bezier(.16,1,.3,1);
}
.mn-header.is-compact .header-inner{
    height: 72px;
}
/* ロゴ画像 */
.mn-logo-link {
    display: block;
}
.mn-logo {
    height: 40px;
    width: auto;
}

/* =========================================
   CENTER TITLE (Scroll Triggered)
   ========================================= */
.mn-header-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -40%); /* 少し上から出現させる演出 */
    text-align: center;
    opacity: 0;
    pointer-events: none; /* クリック透過 */
    
    /* トランジション設定 */
    transition: opacity 0.3s ease, transform 0.3s ease;
    
    /* Flex設定 */
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: 50%;
}

.mn-header-center.is-visible {
    opacity: 1;
    transform: translate(-50%, -50%);
}

/* 中央: 英語サブタイトル */
.mn-center-en {
    display: block;
    font-family: 'Montserrat', sans-serif;
    font-size: clamp(0.75rem, 1.1vw, 1.05rem);
    letter-spacing: 0.14em;
    color: var(--mn-accent);
    text-transform: uppercase;
    margin-bottom: 2px;
}

/* 中央: 日本語メインタイトル */
.mn-center-jp {
    display: block;
    font-family: var(--mn-font-jp);
    font-size: clamp(1rem, 1.6vw, 1.35rem);
    color: var(--mn-text);
    letter-spacing: 0.04em;
    line-height: 1.1;
}


/* =========================================
   HAMBURGER MENU BUTTON
   ========================================= */
.mn-control {
    appearance: none;
    border: none;
    background: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 2100;
    color: var(--mn-text);
    padding: 10px 0;
}

/* テキストラベル部分 */
.mn-label-wrapper {
    position: relative;
    height: 1.4em; 
    overflow: hidden;
    text-align: right;
    min-width: 60px;
    font-family: var(--mn-font-en);
    font-size: 1rem;
    letter-spacing: 0.15em;
    font-weight: 500;
    line-height: 1.4;
}
.mn-label { 
    display: block; 
    transition: transform 0.5s ease; 
}
/* Active時のテキスト入れ替え */
.mn-control.is-active .mn-label-menu { transform: translateY(-100%); }
.mn-control.is-active .mn-label-close { transform: translateY(-100%); }
.mn-control:not(.is-active) .mn-label-close { position: absolute; top: 100%; right: 0; }

/* ハンバーガーアイコン部分 */
.mn-burger {
    position: relative;
    width: 36px;
    height: 8px; 
}
.mn-line {
    position: absolute;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: currentColor;
    transition: all 0.4s ease;
}
.mn-line-1 { top: 0; }
.mn-line-2 { bottom: 0; }

/* Active時の×印化 */
.mn-control.is-active .mn-line-1 { top: 4px; transform: rotate(45deg); }
.mn-control.is-active .mn-line-2 { bottom: 3px; transform: rotate(-45deg); }





/* =========================================
   FULLSCREEN MENU MODAL
   ========================================= */

.mn-modal {
    position: fixed;
    inset: 0;

  top: var(--header-offset);
  left: 0;
  right: 0;
  bottom: 0;

  background-color: #004047;
    z-index: 2050;
    opacity: 0;
    isolation: isolate;
    visibility: hidden;
    pointer-events: none;
    transition: opacity .6s ease, visibility .6s ease;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
}

.mn-modal.is-active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}


/* =========================================
   INNER
   ========================================= */

.mn-modal-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 4rem;
    box-sizing: border-box;
}


/* =========================================
   GRID — 建築的余白
   ========================================= */

.mn-grid {
    width: 100%;
    max-width: 1240px; /* 少し広げた → 美術館感 */
    display: grid;
    grid-template-columns: 1fr;
/*    gap: 72px;  */
}


/* Desktop */
@media (min-width: 992px) {

    .mn-grid {
        grid-template-columns: 1.1fr .9fr;
        gap: 40px; 
    }
}

/* =========================================
   NAV COLUMN
   ========================================= */

.mn-nav-col {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 64px;
}

/* PRIMARY */

.mn-primary-group {
    list-style: none;
    padding: 0;
    margin: 0;

    display: flex;
    flex-direction: column;
/*    gap: 30px;   */
}

.mn-primary-group a[href="/contact/"] {
  font-weight: 700;
}

/* SECONDARY */

.mn-secondary-group {
    list-style: none;
    padding: 0;
    margin: 0;

    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* =========================================
   LINKS — 日本語主役設計
   ========================================= */

.mn-link {
    text-decoration: none;
    color: #ffffff;
    display: flex;
    flex-direction: column;
    width: fit-content;
    max-width: 100%;
    transition: opacity .28s ease;
}

.mn-link:hover {
    opacity: .5; /* 欧州UIはこれだけ */
}

/* 日本語（主役） */
.mn-link-ja {
    font-family: var(--mn-font-jp);
    font-size: clamp(20.00px, calc(2.04vw + 12.35px), 28.00px);
    font-weight: 500;
    letter-spacing: .04em;
    display: block;
}

/* 英語（ラベル） */
.mn-link-en {

    font-family: var(--mn-font-en);
    font-size: 0.85rem;
    letter-spacing: .25em;
    font-weight: 600;
    opacity: 0.7;
    display: block;
    
}

/* SECONDARY */

.mn-link-secondary {
    font-family: var(--mn-font-jp);
    font-size: 1.05rem;
    letter-spacing: .04em;
    color: #ffffff;
    text-decoration: none;
    transition: opacity .25s ease;
}

.mn-link-secondary:hover {
    opacity: .55;
}



/* =========================================
   DIRECTORY COLUMN
   ========================================= */

.mn-prog-col {
    display: flex;
    flex-direction: column;
/*    justify-content: center;  */
}

@media (min-width: 992px) {

    .mn-prog-col {
        padding-left: 12px;
        border-left: 4px dotted rgba(255,255,255,.12);
    }
}

/* =========================================
   SECTION TITLE
   ========================================= */

.mn-section-title {
    font-family: var(--mn-font-en);
    font-size: 1.4rem;
    text-transform: uppercase;
    color: #ffffff;
    opacity: .45;
    margin-bottom: 34px;
}

/* =========================================
   MOBILE ADJUST
   ========================================= */

@media (max-width: 991px) {
  .mn-modal-inner {
    min-height: calc(var(--svh, 1vh) * 100);
    padding-top: calc(
      clamp(64px, 9vh, 110px)
      + env(safe-area-inset-top)
    );
    align-items: flex-start;
  }
}

/* =========================================
   DIRECTORY
   ========================================= */

.mn-dir-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mn-dir-item a {
    text-decoration: none;
    color: #ffffff;
    display: flex;
    flex-direction: column;
    transition: opacity .25s ease;
}

.mn-dir-item a:hover {
    opacity: .5;
}

.mn-dir-ja {
    font-family: var(--mn-font-jp);
    font-size: 1.12rem;
    letter-spacing: .02em;
}

.mn-dir-en {
    font-family: var(--mn-font-en);
    font-size: .68rem;
    letter-spacing: .18em;
    margin-top: 4px;
    opacity: .5;
}

/* =========================================
   ENTRY ANIMATION
   ========================================= */

.mn-animate {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity .7s ease, transform .7s ease;
}

.mn-modal.is-active .mn-animate {
    opacity: 1;
    transform: translateY(0);
}


/* =========================================
   REDUCED MOTION（追加）
   ========================================= */

@media (prefers-reduced-motion: reduce) {
    .mn-animate,
    .mn-modal {
        transition: none;
        transform: none;
    }
}


html.is-scroll-locked {
  overflow: hidden;
  height: 100%;
}

#top-sentinel {
  height: 1px;
}