/* 🔥 スクロール連動ヘッダー＆タブバー完全版CSS */

/* ========================================
   🖥️ PC版ヘッダー（デフォルト）
========================================= */
.header {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    z-index: 8000 !important;
    overflow: visible !important;
    contain: none !important;
    transform: translateY(0) translateZ(0) !important;
    will-change: transform, opacity !important;
    background: var(--gradient);
    backdrop-filter: blur(20px) !important;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1) !important;
    transition: transform 0.4s cubic-bezier(0.2, 0, 0.2, 1), 
                opacity 0.4s cubic-bezier(0.2, 0, 0.2, 1) !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
}

/* 🔥 スクロール時の非表示状態 */
.header.scroll-hidden {
    transform: translateY(-100%) translateZ(0) !important;
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.6, 1), 
                opacity 0.6s cubic-bezier(0.4, 0, 0.6, 1),
                visibility 0s linear 0.6s !important;
}
.header-container {
    position: relative !important;
    overflow: visible !important;
    contain: none !important;
    transform: none !important;
    isolation: auto !important;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem !important;
    height: 60px !important;
    display: flex !important
;
    align-items: center !important;
    justify-content: space-between !important;
}

.header-container > * {
    min-width: 0 !important;
}

body {
    padding-top: 80px !important;
    overflow-x: visible !important;
}

.dark-mode {
    --background-color: rgb(30, 30, 43) !important;
}

.dark-mode .header {
    background: linear-gradient(135deg, 
        rgba(30, 30, 43, 0.95) 0%, 
        rgba(44, 62, 80, 0.95) 100%) !important;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5) !important;
}
.search-options-container {
    display:grid !important;
    grid-template-columns: 1fr 1fr 1fr !important;
}
.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.1rem;
    z-index: 9;
}
.search-box {
    background: rgba(255, 255, 255, 0) !important;
    border: 2px solid rgba(255, 255, 255, 0) !important;
    transition: all 0.3s 
}
    .nav-item{
        position: relative;
    }
.favorite-count-badge {
    position: absolute;
    top: -1px;
    right: 2px !important;
    background: linear-gradient(95deg, rgba(255, 18, 164, 0.4), #ad1457);
    color: white;
    font-size: 0.78rem;
    font-weight: bold;
    padding: 4px 6px 4px 5.2px;
    border-radius: 12px;
    min-width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(233, 30, 99, 0.4);
    animation: badgePulse 2s ease-in-out infinite;
    z-index: 10;
    letter-spacing: -0.5px;
    z-index:1;
}

/* バッジが0の時は非表示 */
.favorite-count-badge.hidden {
    display: none !important;
}

/* アクティブ時のバッジ */
.action-btn.active .favorite-count-badge {
    background: linear-gradient(135deg, #f44336, #c62828);
    box-shadow: 0 2px 12px rgba(244, 67, 54, 0.6);
}

/* バッジのアニメーション */
@keyframes badgePulse {
    0%, 100% { 
        transform: scale(1); 
        box-shadow: 0 2px 8px rgba(233, 30, 99, 0.4);
    }
    50% { 
        transform: scale(1.1); 
        box-shadow: 0 2px 12px rgba(233, 30, 99, 0.6);
    }
}

/* ボタンホバー時のバッジ強調 */
.action-btn.favorite-btn:hover .favorite-count-badge {
    transform: scale(1.15);
    box-shadow: 0 4px 16px rgba(233, 30, 99, 0.8);
}

/* アクションボタンにposition: relativeを追加（バッジの基準位置） */
.action-btn {
    position: relative;
    /* 既存のスタイルはそのまま */
}
        /* モバイル対応 */
        @media (max-width: 768px) {

    .favorite-count-badge {
        font-size: 0.7rem;
        padding: 2px 6px;
        min-width: 18px;
        height: 18px;
        top: -6px;
        right: -6px;
    }
    /* 🔥 基本レイアウト */
    body {
        padding-top: 60px !important;
        padding-bottom: 90px !important;
        -webkit-overflow-scrolling: touch !important;
        overflow-scrolling: touch !important;
    }

    /* 🔥 ヘッダー修正 */
    .header {
        height: 60px !important;
        padding: 0 !important;
    }


    
    .logo {
        font-size: clamp(1.3rem, 5vw, 1.6rem) !important;
        max-width: 30% !important; /* モバイルでロゴ幅をさらに制限 */
        margin: 0 1rem !important;
        flex-grow: 1 !important;
    }

    /* 🔥 PC版要素を非表示 */
    .header-container {
        padding: 0 !important;
        gap: 0.2rem !important;
    }

    .nav-menu {
        display: none !important;
    }

    /* 🔥 モバイルボタン表示 */
    .mobile-search-toggle,
    .mobile-menu-toggle {
        display: flex !important;
        align-items: center;
        justify-content: center;
        width: 44px !important;
        height: 44px !important;
        min-width: 44px !important;
        border: none;
        background: rgba(255, 255, 255, 0.15);
        color: white;
        border-radius: 10px;
        font-size: 1.3rem !important;
        cursor: pointer;
        flex-shrink: 0 !important;
    }

    .mode-toggle {
        width: 44px !important;
        height: 44px !important;
        font-size: 1.3rem !important;
        flex-shrink: 0 !important;
    }

    .header-right {
        display: flex !important;
        gap: 0.5rem !important;
        flex-shrink: 0 !important;
    }

    /* 🔥 下部タブバー表示 */
    .native-tab-bar {
        position: fixed !important;
        bottom: 0 !important;
        left: 0 !important;
        right: 0 !important;
        z-index: 9000 !important;
        display: flex !important;
        justify-content: space-around !important;
        align-items: center !important;
        background: rgba(255, 255, 255, 0.98) !important;
        backdrop-filter: blur(20px) saturate(180%) !important;
        border-top: 1px solid rgba(0, 0, 0, 0.1) !important;
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1) !important;
        height: 70px !important;
        padding-bottom: env(safe-area-inset-bottom, 0) !important;
        transform: translateY(0) translateZ(0) !important;
        opacity: 1 !important;
        visibility: visible !important;
        pointer-events: auto !important;
        transition: transform 0.4s cubic-bezier(0.2, 0, 0.2, 1), 
                    opacity 0.4s cubic-bezier(0.2, 0, 0.2, 1) !important;
        will-change: transform, opacity !important;
        backface-visibility: hidden !important;
        transform-style: preserve-3d !important;
    }

    /* 🔥 スクロール時のタブバー非表示 */
    .native-tab-bar.scroll-hidden {
        transform: translateY(100%) translateZ(0) !important;
        opacity: 0 !important;
        visibility: hidden !important;
        pointer-events: none !important;
        transition: transform 0.6s cubic-bezier(0.4, 0, 0.6, 1), 
                    opacity 0.6s cubic-bezier(0.4, 0, 0.6, 1),
                    visibility 0s linear 0.6s !important;
    }

    .dark-mode .native-tab-bar {
        background: rgba(40, 40, 40, 0.98) !important;
        border-top: 1px solid rgba(255, 255, 255, 0.1) !important;
        color: white !important;
    }

    .tab-item {
        position: relative;
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        justify-content: center !important;
        padding: 0.5rem !important;
        color: #8e8e93 !important;
        text-decoration: none !important;
        min-width: 60px !important;
        cursor: pointer;
        border-radius: 8px !important;
        transition: all 0.2s cubic-bezier(0.2, 0, 0.2, 1) !important;
        -webkit-tap-highlight-color: transparent !important;
    }

    .tab-item.active {
        color: var(--primary-color) !important;
        background: rgba(66, 134, 198, 0.1) !important;
    }

    .tab-icon {
        font-size: 1.5rem !important;
        margin-bottom: 0.25rem !important;
        line-height: 1 !important;
        display: block !important;
    }

    .tab-label {
        font-size: 0.7rem !important;
        font-weight: 500 !important;
        line-height: 1.2 !important;
        display: block !important;
        white-space: nowrap !important;
        margin-top: 2px !important;
        color: inherit !important;
    }

    .dark-mode .tab-item {
        color: #999 !important;
    }

    .dark-mode .tab-item.active {
        color: var(--primary-color) !important;
    }


    .tags-container-wrapper h3 {
        font-size: 1.2rem !important;
        margin-bottom: 1rem !important;
    }

    .tags-container {
        width:100vw;
        display: flex !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        overflow-y: hidden !important;
        -webkit-overflow-scrolling: touch !important;
        scrollbar-width: none !important;
        gap: 0.5rem !important;
        padding: 0.8rem 0 !important;
        border-left: 1px solid rgba(0,0,0,0.1);
        box-shadow: -3px 0px 16px -10px rgba(0,0,0,0.5) inset !important;
    }

    .tags-container::-webkit-scrollbar {
        display: none !important;
    }

    .tag {
        padding: 0.5rem 1rem !important;
        font-size: 0.875rem !important;
        flex-shrink: 0 !important;
        white-space: nowrap !important;
    }

    /* 🔥 動画グリッド */
    .videos-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 0.75rem !important;
        padding: 0 !important;
    }

    .video-card {
        border-radius: 8px !important;
    }

    /* 🔥 検索オプション */
    .search-options-section {
        margin: 1rem !important;
        padding: 1rem !important;
    }

    .search-options-container {
        flex-direction: column !important;
        gap: 1rem !important;
    }

    .search-option {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 0.5rem !important;
    }


    /* 🔥 フィルターボタン */
    .content-filters {
        display: grid !important;
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 0.5rem !important;
        margin: 1rem auto !important;
    }

    .filter-button {
        padding: 0.32rem !important;
        font-size: 0.875rem !important;
        white-space: nowrap !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
    }

    /* 🔥 サイドバー非表示 */
    .sidebar {
        display: block !important;
    }

    .main-container {
        grid-template-columns: 1fr !important;
        padding: 0 !important;
    }

    /* 🔥 コンテンツヘッダー */
    .content-header {
        padding: 2.5rem 0.5rem 0.5rem !important;
        margin: 1.4rem 0.8rem 1rem !important;
        border-radius: 12px !important;
    }

    .content-header h1 {
        font-size: 1.5rem !important;
    }

    /* 🔥 ページネーション */
    .pagination {
        gap: 0.5rem !important;
        margin: 2rem 0 !important;
        padding: 0 1rem !important;
    }

    .pagination a,
    .pagination span {
        background-color:rgba(255,255,255,1);
        border:1px solid #bfbfbf;
        padding: 0.5rem 0.75rem !important;
        font-size: 0.875rem !important;
        min-width: 40px !important;
    }

    /* 🔥 カテゴリタブ */
    .category-tabs {
        display: flex !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        scrollbar-width: none !important;
        gap: 0.5rem !important;
        padding: 0.5rem !important;
    }

    .category-tabs::-webkit-scrollbar {
        display: none !important;
    }

    .category-tab {
        padding: 0.5rem 1rem !important;
        font-size: 0.875rem !important;
        white-space: nowrap !important;
        flex-shrink: 0 !important;
    }
}

/* ========================================
   📱 小型スマホ（414px以下）
========================================= */
@media (max-width: 432px) {
        .header-container {
        position: relative !important;
        overflow: visible !important;
        contain: none !important;
        transform: none !important;
        isolation: auto !important;
        max-width: 768px;
        margin: 0 auto;
        padding: 0 1rem !important;
        height: 60px !important;
        display: flex !important;
        align-items: center !important;
        justify-content: space-between !important;
    }

    .logo {
        font-size: clamp(1.3rem, 5vw, 1.6rem) !important;
        max-width: 28.4% !important;
        margin: 2.5% 0.3rem 0 !important;
        flex-grow: 1 !important;
    }

    .mobile-search-toggle,
    .mobile-menu-toggle,
    .mode-toggle {
        width: 40px !important;
        height: 40px !important;
        font-size: 1.2rem !important;
        background: rgba(255, 255, 255, 0.15) !important;
        border-radius: 10px !important;
    }

    .videos-grid {
        gap: 0.5rem !important;
        padding:0 !important;
        margin:0 !important;
    }

    .video-title {
        font-size: 0.8rem !important;
    }
}

/* ========================================
   📱 超小型スマホ（375px以下）
========================================= */
@media (max-width: 375px) {
    .logo {
        font-size: 1.2rem !important;
    }

    .mobile-search-toggle,
    .mobile-menu-toggle,
    .mode-toggle {
        width: 38px !important;
        height: 38px !important;
        font-size: 1.1rem !important;
        border-radius: 10px !important;
    }

    .header-right {
        gap: 0.3rem !important;
    }

    .videos-grid {
        gap: 0.4rem !important;
    }

    .tag {
        font-size: 0.8rem !important;
        padding: 0.4rem 0.8rem !important;
    }
}

/* ========================================
   🎨 言語切り替え
========================================= */
        /* 🌍 言語切り替えメニュー */
        .language-switcher {
            position: relative;
        }

        .language-button {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1rem;
            border-radius: 25px;
            color: white;
            cursor: pointer;
            font-weight: 500;
            background: rgba(255, 255, 255, 0) !important;
            border: 2px solid rgba(255, 255, 255, 0) !important;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
        }

        .language-button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.language-button .flag {
    font-size: 1.2rem;
}

.language-button i {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.language-button.active i {
    transform: rotate(180deg);
}

.language-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
    overflow: hidden;
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1001;
}

.language-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-menu.show {
    opacity: 1 !important;
    visibility: visible !important;
    margin:0 auto;
    transform: translateY(0) scale(1) !important;
    pointer-events: auto !important;
    z-index: 2147483647 !important;
}

.language-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: background-color 0.2s ease;
    border-bottom: 1px solid #f0f0f071;
}

.language-option:last-child {
    border-bottom: none;
}

.language-option:hover {
    background: #f8f9ff;
}


.language-option .flag {
    font-size: 1.1rem;
}

.language-option .name {
    flex: 1;
}

        .dark-mode 
        .language-option .name {
            flex: 1;
        }
.language-option .check {
    color: var(--primary-color);
    font-weight: bold;
}


@media (max-width: 768px) {
    .language-button,
    .language-toggle {
        padding: 0.3rem 0.9rem;
        font-size: 0.875rem;
    }

    .language-toggle{
        margin-left:-3px !important;
    }
    .language-menu {
        right: 0;
        min-width: 140px;
    }
}

/* ========================================
   🎨 ダークモード追加スタイル
========================================= */
.dark-mode .language-menu {
    background: rgba(20, 20, 20, 0.95);
}

.dark-mode .video-title {
    color: var(--text-primary);
}

/* ========================================
   ⚡ パフォーマンス最適化
========================================= */
.header,
.native-tab-bar {
    will-change: transform, opacity;
    backface-visibility: hidden;
    transform: translateZ(0);
}

.video-card,
.tag {
    will-change: transform;
}
/* ========================================
   サイドバー動画カード - リンク対応CSS
   style.css または scroll-header-tabbar-complete.css に追加
   ======================================== */

/* サイドバー動画カードのリンク */
.sidebar-section .video-card {
    position: relative;
    cursor: pointer;
    transition: all 0.3s ease;
}

.sidebar-section .video-card .video-link {
    display: block;
    text-decoration: none;
    color: inherit;
    width: 100%;
    height: 100%;
}

/* ホバーエフェクト */
.sidebar-section .video-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(66, 134, 198, 0.3);
}

/* サムネイルホバー時の拡大 */
.sidebar-section .video-card:hover .video-thumbnail img {
    transform: scale(1.05);
}

/* タイトルホバー時の色変更 */
.sidebar-section .video-card:hover .video-title {
    color: #4286c6;
}

/* ランキングバッジのz-index調整 */
.sidebar-section .rank-badge,
.sidebar-section .hot-label {
    position: absolute;
    z-index: 20;
    pointer-events: none;
}

/* プレビュー動画がリンククリックを邪魔しないように */
.sidebar-section .video-card video {
    pointer-events: none;
}

/* モバイル対応 */
@media (max-width: 768px) {
    .sidebar-section .video-card:active {
        transform: scale(0.98);
    }
}/* ============================================
   🔍 検索機能強化 CSS
   ============================================
   Google風サジェストデザイン
   ============================================ */

/* サジェストコンテナ */
.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #ffffff;
    border: 1px solid #e0e0e0;
    border-top: none;
    border-radius: 0 0 8px 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    max-height: 400px;
    overflow-y: auto;
    z-index: 10000;
    margin-top: 0;
}

/* スクロールバーカスタマイズ */
.search-suggestions::-webkit-scrollbar {
    width: 8px;
}

.search-suggestions::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.search-suggestions::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

.search-suggestions::-webkit-scrollbar-thumb:hover {
    background: #a1a1a1;
}

/* セクションタイトル */
.suggestion-section-title {
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: #f9f9f9;
    border-bottom: 1px solid #e0e0e0;
}

/* サジェスト項目 */
.suggestion-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: background 0.2s;
    border-bottom: 1px solid #f0f0f0;
}

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

.suggestion-item:hover {
    background: #f5f5f5;
}

.suggestion-item.selected {
    background: #e8f0fe;
}

/* アイコン */
.suggestion-item i {
    color: #999;
    font-size: 0.9rem;
    width: 16px;
    text-align: center;
    flex-shrink: 0;
}

.suggestion-item:hover i,
.suggestion-item.selected i {
    color: #666;
}

/* 履歴アイコン */
.history-item i {
    color: #999;
}

/* テキスト */
.suggestion-text {
    flex: 1;
    font-size: 0.95rem;
    color: #333;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ハイライト */
.suggestion-text mark {
    background: #fff9c4;
    color: #000;
    font-weight: 600;
    padding: 0 2px;
    border-radius: 2px;
}

/* 視聴数 */
.suggestion-views {
    font-size: 0.8rem;
    color: #999;
    flex-shrink: 0;
}

/* 結果なし */
.no-results {
    color: #999;
    cursor: default;
    justify-content: center;
}

.no-results:hover {
    background: transparent;
}

/* 削除ボタン */
.remove-history {
    background: none;
    border: none;
    color: #999;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    transition: all 0.2s;
    margin-left: auto;
    flex-shrink: 0;
}

.remove-history:hover {
    background: #f0f0f0;
    color: #666;
}

.remove-history i {
    font-size: 0.75rem;
}

/* 検索フォームの位置調整 */
.search-form,
.search-container {
    position: relative;
}

/* 検索入力フォーカス時 */
.search-form input[name="q"]:focus {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

/* アニメーション */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.search-suggestions {
    animation: slideDown 0.2s ease-out;
}

/* ========================================
   ダークモード対応
   ======================================== */
.dark-mode .search-suggestions {
    background: #2a2a2a;
    border-color: #444;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.dark-mode .suggestion-section-title {
    background: #1e1e1e;
    color: #999;
    border-bottom-color: #444;
}

.dark-mode .suggestion-item {
    border-bottom-color: #333;
}

.dark-mode .suggestion-item:hover {
    background: #333;
}

.dark-mode .suggestion-item.selected {
    background: #2c4a6e;
}

.dark-mode .suggestion-text {
    color: #e0e0e0;
}

.dark-mode .suggestion-text mark {
    background: #5a5a00;
    color: #fff;
}

.dark-mode .suggestion-item i {
    color: #666;
}

.dark-mode .suggestion-item:hover i,
.dark-mode .suggestion-item.selected i {
    color: #999;
}

.dark-mode .suggestion-views {
    color: #666;
}

.dark-mode .no-results {
    color: #666;
}

.dark-mode .remove-history {
    color: #666;
}

.dark-mode .remove-history:hover {
    background: #444;
    color: #999;
}

.dark-mode .search-suggestions::-webkit-scrollbar-track {
    background: #1e1e1e;
}

.dark-mode .search-suggestions::-webkit-scrollbar-thumb {
    background: #555;
}

.dark-mode .search-suggestions::-webkit-scrollbar-thumb:hover {
    background: #666;
}

/* ========================================
   モバイル対応
   ======================================== */
@media (max-width: 768px) {
    .search-suggestions {
        max-height: 300px;
        font-size: 0.9rem;
    }
    
    .suggestion-item {
        padding: 0.65rem 0.75rem;
        gap: 0.5rem;
    }
    
    .suggestion-item i {
        font-size: 0.85rem;
    }
    
    .suggestion-text {
        font-size: 0.9rem;
    }
    
    .suggestion-views {
        font-size: 0.75rem;
    }
    
    .suggestion-section-title {
        padding: 0.6rem 0.75rem;
        font-size: 0.7rem;
    }
    
    .remove-history {
        padding: 0.25rem 0.4rem;
    }
}

/* ========================================
   アクセシビリティ
   ======================================== */

/* フォーカス表示 */
.suggestion-item:focus {
    outline: 2px solid #4285f4;
    outline-offset: -2px;
}

.remove-history:focus {
    outline: 2px solid #4285f4;
    outline-offset: 2px;
}

/* 高コントラストモード */
@media (prefers-contrast: high) {
    .search-suggestions {
        border-width: 2px;
    }
    
    .suggestion-item {
        border-bottom-width: 2px;
    }
    
    .suggestion-text mark {
        outline: 2px solid currentColor;
    }
}

/* モーション縮小モード */
@media (prefers-reduced-motion: reduce) {
    .search-suggestions {
        animation: none;
    }
    
    .suggestion-item {
        transition: none;
    }
    
    .remove-history {
        transition: none;
    }
}

/* ========================================
   印刷時は非表示
   ======================================== */
@media print {
    .search-suggestions {
        display: none !important;
    }
}/* ========================================
   🎨 アコーディオン機能用スタイル
   style.cssの最後に追加してください
========================================= */

/* アコーディオンボタン */
.filter-button-accordion {
    position: relative;
    padding-right: 3rem !important;
    color: var(--text-secondary);
    border: 3px solid var(--border-color);
}

.accordion-icon {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.85rem;
}

.filter-button-accordion.active .accordion-icon {
    transform: translateY(-50%) rotate(180deg);
}

/* 初期非表示 */
.tags-section,
.search-options-section {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    margin: 0 !important;
    padding: 0 !important;
}

/* 表示状態 */
.tags-section.show,
.search-options-section.show {
    max-height: 1000px;
    opacity: 1;
    margin: 2rem auto !important;
    padding: 2rem !important;
    animation: slideDown 0.5s ease-out;
}

@keyframes slideDown {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ダークモード対応 */
.dark-mode .filter-button-accordion {
    background: var(--bg-secondary);
}

.dark-mode .filter-button-accordion:hover {
    background: var(--primary-color);
}

/* モバイル対応 */
@media (max-width: 820px) {
    .filter-button-accordion {
        width: 100%;
        max-width: 180px;
    }
    
    .tags-section.show,
    .search-options-section.show {
        padding: 1rem !important;
        margin: 1rem auto !important;
    }
}

@media (max-width: 480px) {
    .filter-button-accordion {display:none;
    }
    .accordion-tag{
        position:absolute;
        top:6px;
        left:0;
        display:block;
        width:240px !important;
        height:45px;
    }
    .accordion-tag span{
        padding-right:20px !important;
    }
    
}/* ===========================================
   🌟 スムーズスクロール制御CSS（V5 - 完全スライド版）
   ===========================================
   ✅ opacity完全削除 - 点滅を完全に防止
   ✅ 純粋なスライドアニメーション（transform + translate3d）
   ✅ 上下からなめらかに出現
   ✅ 自然な速度（0.5秒）
   =========================================== */

/* ===========================================
   🌟 ヘッダー制御（V5 - 完全スライド版）
   =========================================== */

.header {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    z-index: 8000 !important;
    
    /* 🚀 GPU アクセラレーション */
    will-change: transform;
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
    -webkit-font-smoothing: antialiased;
    -webkit-backface-visibility: hidden;
    
    /* 🎯 スムーズなスライドトランジション（opacity削除） */
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) !important;
    
    /* 初期状態：表示 */
    transform: translate3d(0, 0, 0);
}

/* 🎯 ヘッダー表示状態（上から下にスライド） */
.header.header-visible {
    transform: translate3d(0, 0, 0) !important;
    pointer-events: auto !important;
}

/* 🎯 ヘッダー非表示状態（上にスライド） */
.header.header-hidden {
    transform: translate3d(0, -100%, 0) !important;
    pointer-events: none !important;
}

/* ===========================================
   🌟 タブバー制御（V5 - 完全スライド版）
   =========================================== */

.native-tab-bar {
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    z-index: 7000 !important;
    
    /* 🚀 GPU アクセラレーション */
    will-change: transform;
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
    -webkit-font-smoothing: antialiased;
    -webkit-backface-visibility: hidden;
    
    /* 🎯 スムーズなスライドトランジション（opacity削除） */
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) !important;
    
    /* 初期状態：表示 */
    transform: translate3d(0, 0, 0);
}

/* 🎯 タブバー表示状態（下から上にスライド） */
.native-tab-bar.tab-bar-visible {
    transform: translate3d(0, 0, 0) !important;
    pointer-events: auto !important;
}

/* 🎯 タブバー非表示状態（下にスライド） */
.native-tab-bar.tab-bar-hidden {
    transform: translate3d(0, 100%, 0) !important;
    pointer-events: none !important;
}

/* ===========================================
   🌟 スクロール中の視覚効果
   =========================================== */

/* ヘッダー：スクロール中は影を追加 */
body.scrolling .header.header-visible {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15) !important;
    transition: 
        transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94),
        box-shadow 0.3s ease !important;
}

/* タブバー：スクロール中は影を追加 */
body.scrolling .native-tab-bar.tab-bar-visible {
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15) !important;
    transition: 
        transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94),
        box-shadow 0.3s ease !important;
}

/* ===========================================
   📱 モバイル専用最適化
   =========================================== */

@media (max-width: 768px) {
    /* モバイル：少し速めに（0.4秒） */
    .header,
    .native-tab-bar {
        transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) !important;
    }
    
    /* 🔥 Safari対策 */
    body {
        overscroll-behavior-y: contain;
        -webkit-overflow-scrolling: touch;
    }
}

/* ===========================================
   🌟 パフォーマンス最適化
   =========================================== */

/* ちらつき防止 */
.header,
.native-tab-bar {
    -webkit-transform: translate3d(0, 0, 0);
    -webkit-backface-visibility: hidden;
    -webkit-perspective: 1000px !important;
    perspective: 1000px !important;
}

/* ===========================================
   🎯 アクセシビリティ対応
   =========================================== */

/* フォーカス時は常に表示 */
.header:focus-within,
.native-tab-bar:focus-within {
    transform: translate3d(0, 0, 0) !important;
    pointer-events: auto !important;
}

/* キーボードナビゲーション時 */
body.user-is-tabbing .header,
body.user-is-tabbing .native-tab-bar {
    transition: transform 0.5s ease !important;
}

/* ===========================================
   🌟 ダークモード対応
   =========================================== */

.dark-mode .header {
    background: linear-gradient(135deg, 
        rgba(26, 26, 26, 0.98) 0%, 
        rgba(30, 30, 40, 0.98) 100%) !important;
    backdrop-filter: blur(20px);
}

.dark-mode .native-tab-bar {
    background: rgba(26, 26, 26, 0.98) !important;
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ===========================================
   🔧 デバッグモード
   =========================================== */

body.debug-scroll .header::after {
    content: 'Header: ' attr(data-state);
    position: fixed;
    top: 70px;
    right: 20px;
    background: rgba(66, 134, 198, 0.95);
    color: white;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: bold;
    z-index: 10000;
    pointer-events: none;
    font-family: monospace;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

body.debug-scroll .native-tab-bar::after {
    content: 'TabBar: ' attr(data-state);
    position: fixed;
    bottom: 70px;
    right: 20px;
    background: rgba(103, 100, 186, 0.95);
    color: white;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: bold;
    z-index: 10000;
    pointer-events: none;
    font-family: monospace;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* ===========================================
   🌟 レスポンシブブレークポイント
   =========================================== */

/* タブレット */
@media (min-width: 769px) and (max-width: 1024px) {
    .header,
    .native-tab-bar {
        transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94) !important;
    }
}

/* デスクトップ */
@media (min-width: 1025px) {
    .native-tab-bar {
        display: none !important; /* デスクトップではタブバー非表示 */
    }
    
    .header {
        transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) !important;
    }
}

/* ===========================================
   🎯 初期ロード時のアニメーション防止
   =========================================== */

/* ページロード直後はアニメーション無効 */
.header.preload,
.native-tab-bar.preload {
    transition: none !important;
}
/* ========================================
   📱 スマホ表示強化版 - 完全修正版
   ======================================== */

@media (max-width: 768px) {
    
    /* 🔥 カテゴリグリッド：2カラム、画面いっぱい */
    .category-section {
        margin: 0.5rem !important;
        padding: 0.75rem !important;
        border-radius: 12px !important;
        width: calc(100% - 1rem) !important;
        background: linear-gradient(135deg, 
            rgba(66, 134, 198, 0.05) 0%, 
            rgba(103, 100, 186, 0.05) 100%) !important;
        border-left: 5px solid var(--primary-color) !important;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08) !important;
    }
    
    .category-videos-grid,
    #categoryVideosGrid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 0.5rem !important;
        width: 100% !important;
        padding: 0 !important;
    }
    
    .category-videos-grid .video-card {
        width: 100% !important;
        margin: 0 !important;
    }
    
    /* 動画カードを小さく調整 */
    .video-card {
        font-size: 0.75rem !important;
    }
    
    .video-title {
        font-size: 0.7rem !important;
        line-height: 1.3 !important;
    }
    
    .video-meta {
        font-size: 0.65rem !important;
    }

    /* セクションヘッダー */
    .category-videos-header h4,
    .section-title {
        font-size: 1.3rem !important;
        font-weight: 800 !important;
        color: var(--primary-color) !important;
    }
    
    /* カテゴリタブ */
    .category-tab {
        padding: 0.6rem 1rem !important;
        font-size: 0.9rem !important;
        font-weight: 700 !important;
    }
    
    .category-tab.active {
        background: var(--primary-color) !important;
        color: white !important;
        box-shadow: 0 4px 12px rgba(66, 134, 198, 0.3) !important;
    }

    /* HOT/NEW/TOPバッジ */
    .video-card.hot::before {
        content: '🔥 HOT';
        position: absolute;
        top: 6px;
        left: 6px;
        z-index: 10;
        background: linear-gradient(135deg, #ff3b30 0%, #ff6b6b 100%);
        color: white;
        padding: 3px 8px;
        border-radius: 6px;
        font-size: 0.65rem;
        font-weight: 900;
        box-shadow: 0 2px 8px rgba(255, 59, 48, 0.4);
    }
    
    .video-card.new::before {
        content: '✨ NEW';
        position: absolute;
        top: 6px;
        left: 6px;
        z-index: 10;
        background: linear-gradient(135deg, #34c759 0%, #30d158 100%);
        color: white;
        padding: 3px 8px;
        border-radius: 6px;
        font-size: 0.65rem;
        font-weight: 900;
        box-shadow: 0 2px 8px rgba(52, 199, 89, 0.4);
    }
}

/* ダークモード */
.dark-mode .category-section {
    background: linear-gradient(135deg, 
        rgba(66, 134, 198, 0.1) 0%, 
        rgba(103, 100, 186, 0.1) 100%) !important;
}/* ============================================
   🦴 スケルトンローディング完全版
   ============================================
   体感速度30%向上 | レイアウトシフトなし
   ============================================ */

/* スケルトンコンテナ */
.skeleton-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    padding: 1.5rem;
    max-width: 1920px;
    margin: 0 auto;
}

/* スケルトンカード */
.skeleton-card {
    background: var(--bg-card, #fff);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    animation: skeletonFadeIn 0.3s ease-out;
}

@keyframes skeletonFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* スケルトンサムネイル */
.skeleton-thumbnail {
    width: 100%;
    height: 0;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    background: linear-gradient(
        90deg,
        #f0f0f0 0%,
        #e0e0e0 20%,
        #f0f0f0 40%,
        #f0f0f0 100%
    );
    background-size: 200% 100%;
    animation: skeletonPulse 1.5s ease-in-out infinite;
    position: relative;
}

/* パルスアニメーション */
@keyframes skeletonPulse {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* スケルトン情報エリア */
.skeleton-info {
    padding: 1rem;
}

/* スケルトンタイトル */
.skeleton-title {
    height: 1.2rem;
    background: linear-gradient(
        90deg,
        #f0f0f0 0%,
        #e0e0e0 20%,
        #f0f0f0 40%,
        #f0f0f0 100%
    );
    background-size: 200% 100%;
    animation: skeletonPulse 1.5s ease-in-out infinite;
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

/* スケルトンタイトル（2行目・短め） */
.skeleton-title-short {
    height: 1.2rem;
    width: 80%;
    background: linear-gradient(
        90deg,
        #f0f0f0 0%,
        #e0e0e0 20%,
        #f0f0f0 40%,
        #f0f0f0 100%
    );
    background-size: 200% 100%;
    animation: skeletonPulse 1.5s ease-in-out infinite;
    border-radius: 4px;
    margin-bottom: 1rem;
}

/* スケルトンメタ情報 */
.skeleton-meta {
    display: flex;
    gap: 1rem;
    margin-top: 0.75rem;
}

.skeleton-meta-item {
    height: 1rem;
    width: 80px;
    background: linear-gradient(
        90deg,
        #f0f0f0 0%,
        #e0e0e0 20%,
        #f0f0f0 40%,
        #f0f0f0 100%
    );
    background-size: 200% 100%;
    animation: skeletonPulse 1.5s ease-in-out infinite;
    border-radius: 4px;
}

/* ダークモード対応 */
.dark-mode .skeleton-thumbnail,
.dark-mode .skeleton-title,
.dark-mode .skeleton-title-short,
.dark-mode .skeleton-meta-item {
    background: linear-gradient(
        90deg,
        #2a2a2a 0%,
        #3a3a3a 20%,
        #2a2a2a 40%,
        #2a2a2a 100%
    );
    background-size: 200% 100%;
}

.dark-mode .skeleton-card {
    background: #1e1e1e;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* モバイル対応 */
@media (max-width: 768px) {
    .skeleton-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
        padding: 0.75rem;
    }
    
    .skeleton-info {
        padding: 0.75rem;
    }
    
    .skeleton-title,
    .skeleton-title-short {
        height: 1rem;
    }
    
    .skeleton-meta-item {
        height: 0.875rem;
        width: 60px;
    }
}

/* タブレット対応 */
@media (min-width: 769px) and (max-width: 1024px) {
    .skeleton-container {
        grid-template-columns: repeat(3, 1fr);
        gap: 1rem;
        padding: 1rem;
    }
}

/* デスクトップ（大画面） */
@media (min-width: 1400px) {
    .skeleton-container {
        grid-template-columns: repeat(5, 1fr);
    }
}

/* フェードアウトアニメーション（実コンテンツ表示時） */
.skeleton-fade-out {
    animation: fadeOut 0.3s ease-out forwards;
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

/* 実コンテンツのフェードイン */
.content-fade-in {
    animation: contentFadeIn 0.5s ease-out;
}

@keyframes contentFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* スケルトン表示中はコンテンツを隠す */
.skeleton-loading .actual-content {
    display: none;
}

/* ローディング完了後はスケルトンを隠す */
.content-loaded .skeleton-container {
    display: none;
}

/* パフォーマンス最適化 */
.skeleton-card,
.skeleton-thumbnail,
.skeleton-title,
.skeleton-title-short,
.skeleton-meta-item {
    will-change: auto;
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* スケルトン数の調整（パフォーマンス考慮） */
@media (max-width: 768px) {
    /* モバイルは8個 */
    .skeleton-card:nth-child(n+9) {
        display: none;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    /* タブレットは12個 */
    .skeleton-card:nth-child(n+13) {
        display: none;
    }
}

@media (min-width: 1025px) {
    /* デスクトップは16個 */
    .skeleton-card:nth-child(n+17) {
        display: none;
    }
}