/* ========================================
   Mobile Menu Overlay & Body Lock Styles
======================================== */

/* オーバーレイはメニューより下 */
.mobile-menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    z-index: var(--overlay-z);
    transition: opacity 0.2s ease;
}

/* メニューオープン中の共通状態 */
body.menu-open {
    overflow: hidden;
    height: 100vh;
}

/* iOS 対応のための追加スタイル */
html.menu-open {
    overflow: hidden;
    height: 100vh;
}

/* アクティブ時にだけ効く */
.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* ========================================
   Mobile Menu Fixed Position Override
======================================== */

/* メニューは最前面＆開いている間だけクリック可能 */
@media (max-width: 768px) {
    .navbar-nav {
        position: fixed !important;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        overflow: auto;
        background: #fff;
        border-radius: 16px 16px 0 0;
        box-shadow: 0 10px 30px rgba(0,0,0,.12);
        padding: 2rem 1rem;
        margin: 0;
        width: auto;
        flex-direction: column;
        gap: 0;

        /* 非表示状態 */
        opacity: 0;
        visibility: hidden;
        pointer-events: none;              /* 非表示時はクリック無効 */
        transform: translateY(-10px);
        transition: opacity .2s ease, transform .2s ease, visibility 0s linear .2s;
    }

    .navbar-nav.active {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;              /* 開いている間だけクリック可能 */
        z-index: var(--menu-z);            /* 最前面に配置 */
        transform: translateY(0);
        transition: opacity .2s ease, transform .2s ease;
    }

    .nav-item {
        width: 100%;
        text-align: center;
        border-bottom: 1px solid #f0f0f0;
    }

    .nav-item:last-child {
        border-bottom: none;
    }

    .nav-link {
        display: block;
        padding: 1rem 0;
        font-size: 1.1rem;
        color: var(--color-sumi);
        text-decoration: none;
        transition: color 0.2s ease;
    }

    .nav-link:hover,
    .nav-item.active .nav-link {
        color: var(--primary-blue);
    }
    
    /* iOS の灰色フラッシュを抑制（任意） */
    .navbar-nav .nav-link {
        -webkit-tap-highlight-color: transparent;
    }
    
    .navbar-nav .nav-link:active {
        opacity: .75; /* 視覚フィードバックが欲しければ */
    }
}