* {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html,
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            background: #0a0e27;
            color: #e0e6ed;
            line-height: 1.6;
        }

        /* ヘッダー（固定） */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 14, 39, 0.95);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        /* メインコンテンツ */
        .main-content {
            padding-top: 0px;
            min-height: 100vh;
        }

        /* 動画グリッド（ファーストビュー最優先） */
        .videos-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
            padding: 20px;
            max-width: 1920px;
            margin: 0 auto;
        }

        .video-card {
            background: #1a1f3a;
            border-radius: 12px;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            cursor: pointer;
        }

        .video-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(66, 134, 198, 0.3);
        }



        .video-duration {
            position: absolute;
            bottom: 8px;
            right: 8px;
            background: rgba(0, 0, 0, 0.8);
            color: white;
            padding: 4px 8px;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 600;
            z-index: 2;
        }

        .video-info {
            padding: 12px;
        }

        .video-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 8px;
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            line-height: 1.4;
        }

        .video-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: #a0aec0;
        }

        .video-stats {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .stat-item {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .stat-item i {
            font-size: 0.85rem;
            opacity: 0.8;
        }
        .video-player {
            position: relative;
            width: 100%;

            background: #000;
        }

        .video-player iframe {
            height: auto !important;
            max-width: 100% !important;
            min-height: 70vh !important;
            aspect-ratio: 560 / 315 !important;
            border: none;
            margin-left: auto !important;
            margin-right: auto !important;
        }

        .video-player-skeleton {
            width: 100%;
            height: 70vh;
            min-height: 400px;
            background: #000;
            position: relative;
            overflow: hidden;
        }

        .video-player-skeleton::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 80px;
            height: 80px;
            border: 6px solid #333;
            border-top-color: #667eea;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        /* スマホ対応 */
        @media (max-width: 768px) {
            .main-content {
                padding-top: 8px;
            }

            .header-right {
                display: flex;
                gap: 0.5rem;
                flex-shrink: 0;
                align-items: center;
            }

            .videos-grid {
                grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
                gap: 8px;
                padding: 8px;
            }

            .video-info {
                padding: 8px;
            }

            .video-title {
                font-size: 0.85rem;
                -webkit-line-clamp: 2;
            }

            .video-meta {
                font-size: 0.7rem;
                gap: 8px;
            }

            .video-duration {
                padding: 2px 6px;
                font-size: 0.7rem;
            }

            .sidebar a.video-link div.video-thumbnail {
                height: 220px !important;
                padding-bottom: 0 !important;
            }
        }

        /* Loading状態 */
        .video-card.loading {
            pointer-events: none;
            opacity: 0.6;
        }

        /* リンクスタイル */
        .video-link {
            text-decoration: none;
            color: inherit;
            display: block;
        }
        /* パンくずリストのホバー効果 */
.breadcrumb a:hover {
    background-color: rgba(66, 138, 198, 0.1) !important;
}

/* モバイル対応 */
@media (max-width: 768px) {
    .breadcrumb {
        font-size: 0.8rem !important;
        padding: 0.5rem 1rem !important;
    }
    
    .breadcrumb span[aria-hidden="true"] {
        margin: 0 0.25rem;
    }
}