/**
    * グローバルナビゲーション
    *
    * @package MetaHouse_Thema
    * @version 2.0.0
    */

    /* ============================================
    ヘッダー
    ============================================ */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: var(--z-fixed);
        background-color: var(--color-white);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-sm);
        transform: translateY(0);
        opacity: 1;
        transition: transform 0.4s ease, opacity 0.4s ease;
        will-change: transform, opacity;
    }

    /* スクロールダウン時に隠す */
    .site-header.header-hidden {
        transform: translateY(-100%) !important;
        opacity: 0;
    }

    .header-container {
        display: flex;
        align-items: center;
        justify-content: center;
        padding: var(--space-3) var(--space-4);
        max-width: var(--container-2xl);
        margin: 0 auto;
        position: relative;
    }

    @media (min-width: 768px) {
        .header-container {
            padding: var(--space-4) var(--space-6);
        }
    }

    @media (min-width: 1024px) {
        .header-container {
            justify-content: space-between;
        }
    }

    /* ============================================
    ロゴ
    ============================================ */
    .site-logo {
        display: flex;
        align-items: center;
        text-decoration: none;
        transition: opacity var(--transition-fast);
    }

    .site-logo:hover {
        opacity: 0.8;
    }

    .site-logo img {
        height: 35px;
        width: auto;
    }

    @media (min-width: 768px) {
        .site-logo img {
            height: 40px;
        }
    }

    /* ============================================
    ナビゲーション
    ============================================ */
    .primary-nav {
        display: none;
    }

    @media (min-width: 1024px) {
        .primary-nav {
            display: flex;
            align-items: center;
            gap: var(--space-8);
        }
    }

    .nav-menu {
        display: flex;
        align-items: center;
        gap: var(--space-6);
        list-style: none;
        margin: 0;
        padding: 0;
    }

    .nav-menu a {
        color: var(--color-text-primary);
        font-size: var(--text-base);
        font-weight: var(--font-medium);
        text-decoration: none;
        padding: var(--space-2) var(--space-3);
        transition: color var(--transition-fast);
        position: relative;
    }

    .nav-menu a:hover {
        color: #01294D;
    }

    .nav-menu a::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 0;
        height: 2px;
        background-color: #01294D;
        transition: width var(--transition-base);
    }

    .nav-menu a:hover::after,
    .nav-menu a.active::after {
        width: 80%;
    }

    /* ============================================
    CTAボタン
    ============================================ */
    .header-cta {
        display: none;
    }

    @media (min-width: 1024px) {
        .header-cta {
            display: flex;
            gap: var(--space-3);
        }
    }

    /* ============================================
    ハンバーガーメニュー
    ============================================ */
    .menu-toggle {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        width: 40px;
        height: 35px;
        background: transparent;
        border: none;
        cursor: pointer;
        padding: 0;
        z-index: var(--z-fixed);
        position: absolute;
        right: var(--space-4);
    }

    @media (min-width: 1024px) {
        .menu-toggle {
            display: none;
        }
    }

    .menu-toggle span {
        display: block;
        width: 24px;
        height: 3px;
        background-color: #01294D;
        border-radius: 2px;
        transition: all var(--transition-base);
        position: relative;
    }

    /* スクロール時は色を維持 */
    .site-header.scrolled .menu-toggle span {
        background-color: #01294D;
    }

    .menu-toggle span:not(:last-child) {
        margin-bottom: 6px;
    }

    /* メニューが開いた時のハンバーガーアイコン */
    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }

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

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

    /* ============================================
    モバイルメニュー
    ============================================ */
    .mobile-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background-color: var(--color-white);
        box-shadow: var(--shadow-xl);
        overflow-y: auto;
        z-index: calc(var(--z-fixed) - 1);
        transition: right var(--transition-slow);
        padding-top: 80px;
    }

    .mobile-nav.active {
        right: 0;
    }

    .mobile-nav-menu {
        list-style: none;
        margin: 0;
        padding: var(--space-6);
    }

    .mobile-nav-menu li {
        border-bottom: 1px solid var(--color-border-light);
    }

    .mobile-nav-menu a {
        display: block;
        padding: var(--space-4);
        color: var(--color-text-primary);
        font-size: var(--text-lg);
        font-weight: var(--font-medium);
        text-decoration: none;
        transition: all var(--transition-fast);
    }

    .mobile-nav-menu a:hover {
        background-color: var(--color-bg-secondary);
        color: #01294D;
        padding-left: var(--space-6);
    }

    .mobile-nav-cta {
        padding: var(--space-6);
        display: flex;
        flex-direction: column;
        gap: var(--space-3);
    }

    /* ============================================
    メニューオーバーレイ
    ============================================ */
    .menu-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background-color: rgba(0, 0, 0, 0.5);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        z-index: calc(var(--z-fixed) - 2);
    }

    .menu-overlay.active {
        opacity: 1;
        visibility: visible;
    }

    /* ============================================
    スクロール時のヘッダー固定CTA
    ============================================ */
    .floating-cta {
        position: fixed;
        bottom: 80px;
        right: 0;
        z-index: var(--z-sticky);
        opacity: 0;
        visibility: hidden;
        transform: translateX(100%);
        transition: transform 0.4s ease, opacity 0.4s ease, visibility 0.4s ease;
        writing-mode: vertical-rl;
    }

    .floating-cta.visible {
        opacity: 1;
        visibility: visible;
        transform: translateX(0);
    }

    @media (min-width: 1024px) {
        .floating-cta {
            display: none;
        }
    }

    .floating-cta .btn {
        box-shadow: var(--shadow-lg);
        padding: var(--space-6) var(--space-3);
        font-size: var(--text-base);
        border-radius: 0;
        border-top-left-radius: var(--rounded-lg);
        border-bottom-left-radius: var(--rounded-lg);
        min-height: 150px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .floating-cta .btn:hover {
        box-shadow: var(--shadow-xl);
    }

    /* ============================================
    ブレッドクラム位置調整
    ============================================ */
    .breadcrumbs {
        padding-top: 0;
    }