/* ============================================
           首頁專屬樣式 - 整合暗色模式支援
           ============================================ */

    :root {
        --preview-footer-h: 56px;
        --preview-topbar-h: 44px;
        --preview-progress-h: 56px;
        --preview-meta-h: 132px;
        --preview-group-panel-h: 0px; /* 動態高度 */
    }

    /* ============================================
           篩選按鈕樣式
           ============================================ */
    .btn-outline-primary {
        border: 2px solid var(--primary-color, #6366f1) !important;
        color: var(--primary-color, #6366f1);
    }

    .btn-outline-primary:hover {
        background-color: rgba(99, 102, 241, 0.1);
    }

    .btn-outline-primary.active {
        background-color: var(--primary-color, #6366f1) !important;
        border-color: var(--primary-color, #6366f1) !important;
        color: #fff !important;
    }

    #group-buttons-container > .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 44px;
        line-height: 1.15;
        text-align: center;
    }

    .btn-outline-warning.active {
        background-color: #f59e0b !important;
        border-color: #f59e0b !important;
        color: #fff !important;
    }

    .btn-outline-success.active {
        background-color: #10b981 !important;
        border-color: #10b981 !important;
        color: #fff !important;
    }

    /* ============================================
           自動演唱者合輯
           ============================================ */
    .performer-collection-section {
        width: min(1120px, calc(100% - 32px));
        margin: 0 auto;
        padding: 18px;
        border: 1px solid var(--border-color);
        border-radius: 20px;
        background: linear-gradient(135deg, rgba(99,102,241,.10), rgba(16,185,129,.08)), var(--bg-primary);
        box-shadow: var(--shadow-sm);
    }

    .performer-collection-header {
        display: flex;
        justify-content: space-between;
        align-items: flex-end;
        gap: 16px;
        margin-bottom: 14px;
    }

    .performer-collection-eyebrow {
        margin: 0 0 4px;
        color: var(--primary-color, #6366f1);
        font-size: .78rem;
        font-weight: 800;
        letter-spacing: .08em;
    }

    .performer-collection-title {
        margin: 0;
        color: var(--text-primary);
        font-size: 1.25rem;
        font-weight: 800;
    }

    .performer-collection-clear {
        color: var(--primary-color, #6366f1);
        font-size: .9rem;
        font-weight: 700;
        text-decoration: none;
        white-space: nowrap;
    }

    .performer-collection-actions {
        display: flex;
        align-items: center;
        justify-content: flex-end;
        gap: 8px;
        flex-wrap: wrap;
    }

    .performer-collection-nav {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 38px;
        height: 38px;
        border: 1px solid rgba(99,102,241,.24);
        border-radius: 999px;
        background: rgba(255,255,255,.82);
        color: var(--primary-color, #6366f1);
        box-shadow: 0 8px 18px rgba(15,23,42,.10);
        transition: transform .16s ease, background-color .16s ease, border-color .16s ease, opacity .16s ease;
    }

    .performer-collection-nav:hover,
    .performer-collection-nav:focus-visible {
        transform: translateY(-1px);
        border-color: var(--primary-color, #6366f1);
        background: rgba(99,102,241,.12);
        outline: none;
    }

    .performer-collection-nav:disabled {
        cursor: default;
        opacity: .38;
        transform: none;
        box-shadow: none;
    }

    .performer-collection-list {
        display: flex;
        gap: 12px;
        overflow-x: auto;
        overflow-y: hidden;
        scroll-behavior: smooth;
        scroll-snap-type: x mandatory;
        scrollbar-width: none;
        padding: 2px 4px 10px;
        margin: 0 -4px -6px;
        overscroll-behavior-x: contain;
        -webkit-overflow-scrolling: touch;
    }

    .performer-collection-list::-webkit-scrollbar {
        display: none;
    }

    .performer-collection-list-infinite {
        scrollbar-width: none;
    }

    .performer-collection-list-jump {
        scroll-behavior: auto !important;
    }

    .performer-collection-card {
        display: flex;
        align-items: center;
        gap: 10px;
        flex: 0 0 clamp(190px, 24vw, 240px);
        min-width: 190px;
        padding: 10px;
        border: 1px solid rgba(99,102,241,.16);
        border-radius: 16px;
        background: rgba(255,255,255,.78);
        color: var(--text-primary);
        text-decoration: none;
        scroll-snap-align: start;
        transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease;
    }

    .performer-collection-card:hover,
    .performer-collection-card.active {
        transform: translateY(-2px);
        border-color: var(--primary-color, #6366f1);
        box-shadow: var(--shadow-md);
    }

    .performer-collection-thumb {
        flex: 0 0 52px;
        width: 52px;
        height: 52px;
        border-radius: 50%;
        object-fit: cover;
        background: var(--bg-tertiary);
    }

    .performer-collection-thumb.fallback {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        color: var(--primary-color, #6366f1);
    }

    .performer-collection-meta {
        display: flex;
        flex-direction: column;
        min-width: 0;
        line-height: 1.25;
    }

    .performer-collection-meta strong,
    .performer-collection-meta span {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .performer-collection-meta span {
        color: var(--text-muted, #94a3b8);
        font-size: .86rem;
        font-weight: 600;
    }

    .dark-theme .performer-collection-card {
        background: rgba(15,23,42,.72);
    }

    .dark-theme .performer-collection-nav {
        background: rgba(15,23,42,.76);
        border-color: rgba(148,163,184,.28);
        box-shadow: 0 8px 18px rgba(0,0,0,.24);
    }

    .home-pagination {
        width: min(1120px, calc(100% - 32px));
        margin: 24px auto 4px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 10px;
    }

    .home-pagination-summary {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px 14px;
        color: var(--text-secondary);
        font-size: .92rem;
        font-weight: 600;
        text-align: center;
    }

    .home-pagination-controls {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px;
    }

    .home-pagination-pages {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        flex: 0 1 auto;
        min-width: 0;
    }

    .home-pagination-link,
    .home-pagination-number {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        border: 1px solid rgba(99,102,241,.28);
        background: var(--bg-primary);
        color: var(--primary-color, #6366f1);
        font-weight: 800;
        text-decoration: none;
        box-shadow: var(--shadow-sm);
        transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease;
    }

    .home-pagination-link {
        min-height: 42px;
        border-radius: 999px;
        padding: 9px 15px;
        white-space: nowrap;
    }

    .home-pagination-number {
        width: 42px;
        height: 42px;
        border-radius: 12px;
        flex: 0 0 42px;
    }

    .home-pagination-link:hover,
    .home-pagination-link:focus-visible,
    .home-pagination-number:hover,
    .home-pagination-number:focus-visible {
        transform: translateY(-1px);
        border-color: var(--primary-color, #6366f1);
        color: var(--primary-hover, #4f46e5);
        box-shadow: var(--shadow-md);
        outline: none;
    }

    .home-pagination-link.disabled {
        pointer-events: none;
        opacity: .42;
        box-shadow: none;
    }

    .home-pagination-number.active {
        background: var(--primary-color, #6366f1);
        border-color: var(--primary-color, #6366f1);
        color: #fff;
        box-shadow: 0 10px 18px rgba(99,102,241,.24);
    }

    .home-pagination-ellipsis {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 20px;
        height: 42px;
        color: var(--text-muted, #94a3b8);
        font-weight: 800;
    }

    .dark-theme .home-pagination-link,
    .dark-theme .home-pagination-number {
        background: rgba(15,23,42,.76);
        border-color: rgba(148,163,184,.26);
    }

    .dark-theme .home-pagination-number.active {
        background: var(--primary-color, #6366f1);
        border-color: var(--primary-color, #6366f1);
    }

    @media (max-width: 640px) {
        .home-pagination {
            width: 100%;
            padding: 0 12px;
            align-items: center;
        }

        .home-pagination-edge span {
            display: none;
        }

        .home-pagination-link {
            min-width: 42px;
            padding: 9px 12px;
        }

        .home-pagination-pages {
            order: -1;
            flex: 1 0 100%;
            justify-content: center;
            width: 100%;
            overflow-x: auto;
            padding: 2px 2px 8px;
            scrollbar-width: thin;
            -webkit-overflow-scrolling: touch;
        }
    }

    /* ============================================
           卡片基礎樣式
           ============================================ */
    .card {
        position: relative;
        transition: box-shadow 0.2s ease;
        will-change: box-shadow;
        background-color: var(--bg-primary);
        border: 1px solid var(--border-color);
    }

        .card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }

    .card-img-top {
        aspect-ratio: 16/9;
        object-fit: cover;
        display: block;
    }

    .thumb-fallback {
        height: 180px;
        background-color: var(--bg-tertiary);
    }

    .card-body-compact {
        padding: 10px 12px;
        min-height: auto;
        background-color: var(--bg-primary);
    }

    .home-processing-badge {
        position: absolute;
        left: 8px;
        top: 8px;
        z-index: 3;
        pointer-events: none;
    }

    .home-processing-badge .badge {
        box-shadow: 0 4px 14px rgba(15, 23, 42, 0.18);
        backdrop-filter: blur(4px);
    }

    /* 🔥 修正：卡片標題和副標題顏色 */
    .card-title {
        color: var(--text-primary) !important;
        font-weight: 600;
        font-size: 0.95rem;
    }

    .song-meta-stack {
        display: flex;
        flex-direction: column;
        gap: 4px;
    }

    .song-meta-line {
        display: flex;
        align-items: center;
        gap: 6px;
        min-width: 0;
        color: var(--text-secondary) !important;
        font-size: 0.8rem;
        line-height: 1.25;
    }

    .song-meta-line-primary {
        color: var(--text-primary) !important;
        font-weight: 600;
    }

    .song-meta-label {
        flex: 0 0 auto;
        min-width: 3.75em;
        padding: 1px 6px;
        border-radius: 999px;
        background: rgba(99, 102, 241, 0.10);
        color: var(--primary-color, #6366f1);
        font-size: 0.72rem;
        font-weight: 700;
        letter-spacing: 0.02em;
        text-align: center;
        white-space: nowrap;
    }

    .song-meta-value {
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .card-subtitle,
    .card-cover {
        color: var(--text-muted, #94a3b8) !important;
        font-weight: 500;
    }

    .dark-theme .song-meta-label {
        background: rgba(129, 140, 248, 0.16);
        color: var(--primary-light, #a5b4fc);
    }

    .clamp-1 {
        display: -webkit-box;
        -webkit-line-clamp: 1;
        -webkit-box-orient: vertical;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: normal;
    }

    /* ============================================
           群組按鈕樣式
           ============================================ */
    .btn-purple {
        color: #a777e3;
        border: 2px solid #a777e3;
        background: transparent;
        font-weight: 600;
        position: relative;
        padding-right: 116px !important; /* 預留右側操作區空間 */
        min-height: 44px;
        transition: all 0.2s ease;
    }

        .btn-purple:hover, .btn-purple.active {
            background: linear-gradient(135deg, #a777e3, #8e44ad);
            border-color: #8e44ad;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(142, 68, 173, 0.4);
        }

    .group-label { display: inline; max-width: none; overflow: visible; white-space: normal; overflow-wrap: anywhere; }

    .group-actions {
        position: absolute;
        right: 8px;
        top: 50%;
        transform: translateY(-50%);
        display: flex;
        gap: 8px;
        align-items: center;
    }

    .group-action-btn {
        width: 34px;
        height: 34px;
        border-radius: 50%;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border: 1px solid rgba(0,0,0,.12);
        background: rgba(255,255,255,.9);
        color: #4b5563; /* slate-600 */
        box-shadow: 0 2px 8px rgba(0,0,0,.15);
        cursor: pointer;
        transition: all .15s ease;
    }

    .dark-theme .group-action-btn { background: var(--bg-tertiary); color: var(--text-primary); border-color: var(--border-color); }
    .group-action-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
    .group-action-btn.play { color: #10b981; }
    .group-action-btn.delete { color: #ef4444; }

    /* 🔥 修正：卡片標題和副標題顏色 */
    .card-title {
        color: var(--text-primary) !important;
        font-weight: 600;
        font-size: 0.95rem;
    }

    .song-meta-stack {
        display: flex;
        flex-direction: column;
        gap: 4px;
    }

    .song-meta-line {
        display: flex;
        align-items: center;
        gap: 6px;
        min-width: 0;
        color: var(--text-secondary) !important;
        font-size: 0.8rem;
        line-height: 1.25;
    }

    .song-meta-line-primary {
        color: var(--text-primary) !important;
        font-weight: 600;
    }

    .song-meta-label {
        flex: 0 0 auto;
        min-width: 3.75em;
        padding: 1px 6px;
        border-radius: 999px;
        background: rgba(99, 102, 241, 0.10);
        color: var(--primary-color, #6366f1);
        font-size: 0.72rem;
        font-weight: 700;
        letter-spacing: 0.02em;
        text-align: center;
        white-space: nowrap;
    }

    .song-meta-value {
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .card-subtitle,
    .card-cover {
        color: var(--text-muted, #94a3b8) !important;
        font-weight: 500;
    }

    .dark-theme .song-meta-label {
        background: rgba(129, 140, 248, 0.16);
        color: var(--primary-light, #a5b4fc);
    }

    .clamp-1 {
        display: -webkit-box;
        -webkit-line-clamp: 1;
        -webkit-box-orient: vertical;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: normal;
    }

    /* ============================================
           群組按鈕樣式
           ============================================ */
    .btn-purple {
        color: #a777e3;
        border: 2px solid #a777e3;
        background: transparent;
        font-weight: 600;
        position: relative;
        padding-right: 116px !important; /* 預留右側操作區空間 */
        min-height: 44px;
        transition: all 0.2s ease;
    }

        .btn-purple:hover, .btn-purple.active {
            background: linear-gradient(135deg, #a777e3, #8e44ad);
            border-color: #8e44ad;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(142, 68, 173, 0.4);
        }

    .group-label { display: inline; max-width: none; overflow: visible; white-space: normal; overflow-wrap: anywhere; }

    .group-actions {
        position: absolute;
        right: 8px;
        top: 50%;
        transform: translateY(-50%);
        display: flex;
        gap: 8px;
        align-items: center;
    }

    .group-action-btn {
        width: 34px;
        height: 34px;
        border-radius: 50%;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border: 1px solid rgba(0,0,0,.12);
        background: rgba(255,255,255,.9);
        color: #4b5563; /* slate-600 */
        box-shadow: 0 2px 8px rgba(0,0,0,.15);
        cursor: pointer;
        transition: all .15s ease;
    }

    .dark-theme .group-action-btn { background: var(--bg-tertiary); color: var(--text-primary); border-color: var(--border-color); }
    .group-action-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
    .group-action-btn.play { color: #10b981; }
    .group-action-btn.delete { color: #ef4444; }

    /* ============================================
           右上角迷你愛心
           ============================================ */
    .mini-heart-btn {
        position: absolute;
        right: 8px;
        top: 8px;
        width: 32px;
        height: 32px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.95);
        border: 1px solid rgba(0,0,0,.1);
        box-shadow: 0 2px 8px rgba(0,0,0,.18);
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 3;
        cursor: pointer;
        transition: all 0.15s ease;
        backdrop-filter: blur(4px);
    }

    /* 🔥 暗色模式下的愛心按鈕 */
    .dark-theme .mini-heart-btn {
        background: rgba(30, 41, 59, 0.95);
        border-color: var(--border-color);
        box-shadow: 0 2px 8px rgba(0,0,0,.4);
    }

    .mini-heart-btn:hover {
        transform: scale(1.1);
        box-shadow: 0 4px 12px rgba(0,0,0,.25);
    }

    .mini-heart-btn:active {
        transform: scale(0.95);
    }

    .mini-heart-btn i {
        font-size: 15px;
        line-height: 1;
        transition: color .12s ease, transform .12s ease;
    }

    .mini-heart-btn:not(.on) i {
        color: #999;
    }

    .dark-theme .mini-heart-btn:not(.on) i {
        color: var(--text-tertiary);
    }

    .mini-heart-btn.on i {
        color: #e74c3c;
    }

    /* ============================================
           放大預覽卡片 - 修正暗色模式
           ============================================ */
    .hover-card-preview {
        position: fixed;
        z-index: 500;
        opacity: 0;
        pointer-events: none;
        transition: opacity .12s ease-out;
        border-radius: 12px;
        box-shadow: var(--shadow-xl);
        background: var(--bg-primary);
        overflow: hidden;
        padding-bottom: var(--preview-footer-h);
        transform: translateZ(0);
        will-change: transform, opacity;
        backface-visibility: hidden;
        border: 1px solid var(--border-color);
    }

        .hover-card-preview.show {
            opacity: 1;
            pointer-events: auto;
        }

        .hover-card-preview > .preview-link-overlay {
            display: none !important;
        }

        /* ============================================
           影片區域
           ============================================ */
        .hover-card-preview .video-wrap {
            position: relative;
            width: 100%;
            aspect-ratio: 16/9;
            background: var(--video-bg);
            overflow: hidden;
            transform: translateZ(0);
        }

        .hover-card-preview iframe {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            border: 0;
            background: var(--video-bg);
        }

    .video-section {
        position: relative;
    }

        .video-section .preview-link-overlay {
            position: absolute;
            left: 0;
            right: 0;
            top: var(--preview-topbar-h);
            bottom: 0;
            z-index: 1;
            background: transparent;
            display: block;
            text-indent: -9999px;
        }

        /* ============================================
           預覽頂部控制列
           ============================================ */
        .video-section .preview-topbar {
            position: absolute;
            left: 0;
            right: 0;
            top: 0;
            height: var(--preview-topbar-h);
            display: flex;
            align-items: center;
            justify-content: flex-end;
            padding: 8px 10px;
            background: linear-gradient(to bottom, rgba(0,0,0,.5), rgba(0,0,0,0));
            z-index: 2;
            pointer-events: none;
        }

    .preview-topbar .speaker-btn {
        pointer-events: auto;
        width: 36px;
        height: 36px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(255,255,255,.95);
        border: 1px solid rgba(0,0,0,.1);
        cursor: pointer;
        box-shadow: 0 2px 8px rgba(0,0,0,.25);
        transition: all 0.15s ease;
    }

        .preview-topbar .speaker-btn:hover {
            transform: scale(1.1);
            box-shadow: 0 4px 12px rgba(0,0,0,.3);
        }

        .preview-topbar .speaker-btn i {
            font-size: 16px;
            color: var(--text-secondary);
        }

    /* 🔥 暗色模式下的音量按鈕 */
    .dark-theme .preview-topbar .speaker-btn {
        background: var(--bg-tertiary);
        border-color: var(--border-color);
    }

        .dark-theme .preview-topbar .speaker-btn i {
            color: var(--text-primary);
        }

    /* ============================================
           預覽資訊區
           ============================================ */
    .preview-meta {
        position: relative;
        z-index: 3;
        padding: 12px 14px 10px 14px;
        height: var(--preview-meta-h);
        box-sizing: border-box;
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        border-bottom: 1px solid var(--border-color);
        background: var(--bg-primary);
    }

    .preview-meta-link {
        color: inherit;
        text-decoration: none;
        cursor: pointer;
    }

        .preview-meta-link:hover,
        .preview-meta-link:focus {
            color: inherit;
            text-decoration: none;
            background: var(--bg-secondary);
            outline: none;
        }

        .preview-meta .title {
            font-size: 1.18rem;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            flex: 0 0 auto;
        }

        .preview-meta .subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.2;
            margin-top: 4px;
        }

        .preview-meta .meta-list {
            display: flex;
            flex-direction: column;
            gap: 4px;
            margin-top: 8px;
            flex: 1 1 auto;
            min-height: 0;
        }

        .preview-meta .meta-row {
            display: flex;
            align-items: center;
            gap: 8px;
            min-width: 0;
            font-size: .86rem;
            color: var(--text-muted, #94a3b8);
            line-height: 1.15;
        }

        .preview-meta .meta-row.primary {
            color: var(--text-secondary);
            font-weight: 600;
        }

        .preview-meta .meta-label {
            flex: 0 0 auto;
            min-width: 4.25em;
            padding: 1px 7px;
            border-radius: 999px;
            background: rgba(99, 102, 241, 0.10);
            color: var(--primary-color, #6366f1);
            font-size: .74rem;
            font-weight: 700;
            text-align: center;
            white-space: nowrap;
        }

        .preview-meta .meta-value {
            min-width: 0;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .dark-theme .preview-meta .meta-label {
            background: rgba(129, 140, 248, 0.16);
            color: var(--primary-light, #a5b4fc);
        }

    /* ============================================
           進度條區域
           ============================================ */
    .preview-progress {
        position: relative;
        z-index: 3;
        height: var(--preview-progress-h);
        padding: 10px 14px;
        box-sizing: border-box;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border-color);
    }

    .pp-time {
        display: flex;
        justify-content: space-between;
        font-size: .9rem;
        color: var(--text-secondary);
        margin-bottom: 6px;
    }

    .pp-range {
        width: 100%;
    }

        .pp-range input[type="range"] {
            width: 100%;
            -webkit-appearance: none;
            appearance: none;
            background: transparent;
            cursor: pointer;
        }

            .pp-range input[type="range"]::-webkit-slider-track {
                background: var(--bg-tertiary);
                height: 4px;
                border-radius: 2px;
            }

            .pp-range input[type="range"]::-webkit-slider-thumb {
                -webkit-appearance: none;
                appearance: none;
                width: 12px;
                height: 12px;
                background: var(--primary-color);
                border-radius: 50%;
                cursor: pointer;
                transition: transform 0.1s ease;
            }

                .pp-range input[type="range"]::-webkit-slider-thumb:hover {
                    transform: scale(1.3);
                }

            .pp-range input[type="range"]::-moz-range-track {
                background: var(--bg-tertiary);
                height: 4px;
                border-radius: 2px;
            }

            .pp-range input[type="range"]::-moz-range-thumb {
                width: 12px;
                height: 12px;
                background: var(--primary-color);
                border: none;
                border-radius: 50%;
                cursor: pointer;
            }

    /* ============================================
           預覽底部按鈕區
           ============================================ */
    .hover-card-preview .preview-footer {
        position: absolute;
        left: 0;
        right: 0;
        bottom: 0;
        height: var(--preview-footer-h);
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 8px 12px;
        background: var(--bg-primary);
        border-top: 1px solid var(--border-color);
        backdrop-filter: blur(6px);
        z-index: 4;
    }

    .preview-footer .preview-left {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .preview-footer .preview-right {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .preview-avatar {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        object-fit: cover;
        box-shadow: 0 2px 6px rgba(0,0,0,.3);
        border: 2px solid var(--border-color);
    }

    .round-btn {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        border: 1px solid var(--border-color);
        background: var(--bg-secondary);
        cursor: pointer;
        transition: all 0.15s ease;
    }

        .round-btn:hover {
            transform: scale(1.1);
            background: var(--bg-tertiary);
            box-shadow: var(--shadow-md);
        }

        .round-btn i {
            font-size: 15px;
            line-height: 1;
            color: var(--text-secondary);
        }

        .round-btn.heart.active {
            background: rgba(231, 76, 60, 0.1);
            border-color: #e74c3c;
        }

            .round-btn.heart.active i {
                color: #e74c3c;
            }

        .round-btn.heart i {
            transition: color .12s ease;
        }

    /* ============================================
           🆕 內嵌群組面板 (收合式)
           ============================================ */
    .preview-group-panel {
        position: absolute;
        left: 0;
        right: 0;
        bottom: var(--preview-footer-h);
        background: var(--bg-primary);
        border-top: 1px solid var(--border-color);
        z-index: 3;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease, opacity 0.3s ease;
        opacity: 0;
    }

        .preview-group-panel.expanded {
            max-height: 320px;
            opacity: 1;
        }

    .pgp-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 14px;
        border-bottom: 1px solid var(--border-color);
        background: var(--bg-secondary);
    }

    .pgp-title {
        font-weight: 700;
        font-size: 15px;
        color: var(--text-primary);
    }

    .pgp-close {
        width: 28px;
        height: 28px;
        border-radius: 50%;
        border: 1px solid var(--border-color);
        background: var(--bg-tertiary);
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: all 0.15s ease;
    }

        .pgp-close:hover {
            transform: scale(1.1);
            background: var(--bg-hover);
        }

        .pgp-close i {
            font-size: 13px;
            color: var(--text-secondary);
        }

    .pgp-inner {
        padding: 12px 14px;
        border-bottom: 1px solid var(--border-color);
        background: var(--bg-primary);
    }

    .pgp-row {
        display: flex;
        gap: 8px;
        align-items: center;
    }

    .pgp-input-wrap {
        position: relative;
        flex: 1 1 auto;
    }

    .pgp-input {
        width: 100%;
        padding: 9px 34px 9px 34px;
        border-radius: 10px;
        border: 2px solid var(--border-color);
        outline: 0;
        background: var(--bg-secondary);
        color: var(--text-primary);
        font-size: 13px;
        transition: all 0.15s ease;
    }

        .pgp-input:focus {
            border-color: var(--primary-color);
            background: var(--bg-primary);
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
        }

        .pgp-input::placeholder {
            color: var(--text-tertiary);
        }

    .pgp-icon-left {
        position: absolute;
        left: 10px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--text-tertiary);
        font-size: 13px;
    }

    .pgp-icon-right {
        position: absolute;
        right: 10px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--text-muted);
        font-size: 12px;
    }

    .pgp-create-btn {
        white-space: nowrap;
        border-radius: 10px;
        padding: 9px 12px;
        font-weight: 600;
        font-size: 13px;
        border: none;
        background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
        color: #fff;
        display: flex;
        gap: 6px;
        align-items: center;
        cursor: pointer;
        transition: all 0.15s ease;
    }

        .pgp-create-btn:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .pgp-create-btn:disabled {
            opacity: .6;
            cursor: not-allowed;
            transform: none;
        }

    .pgp-error {
        color: var(--danger-color);
        font-size: 12px;
        margin-top: 6px;
        display: none;
    }

        .pgp-error.show {
            display: block;
        }

    .pgp-list {
        list-style: none;
        margin: 0;
        padding: 8px 6px;
        max-height: 180px;
        overflow: auto;
        background: var(--bg-primary);
    }

    .pgp-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 9px 11px;
        border-radius: 8px;
        cursor: pointer;
        border: 1px solid transparent;
        transition: all 0.15s ease;
    }

        .pgp-item:hover {
            background: var(--bg-tertiary);
            border-color: var(--border-hover);
        }

        .pgp-item:focus {
            outline: 0;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
        }

        .pgp-item .name {
            font-weight: 600;
            font-size: 13px;
            color: var(--text-primary);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 180px;
        }

    .pgp-chip {
        border-radius: 999px;
        padding: 5px 10px;
        font-size: 11px;
        font-weight: 700;
        background: rgba(99, 102, 241, 0.1);
        color: var(--primary-color);
        border: 1px solid rgba(99, 102, 241, 0.2);
    }

        .pgp-chip.success {
            background: rgba(16, 185, 129, 0.1);
            color: var(--success-color);
            border-color: rgba(16, 185, 129, 0.2);
        }

    .pgp-empty {
        color: var(--text-tertiary);
        padding: 16px 10px;
        text-align: center;
        font-size: 13px;
    }

    /* ============================================
           刪除群組模態框（覆蓋層與彈窗）
           ============================================ */
    .delete-modal-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.45);
        opacity: 0;
        pointer-events: none;
        transition: opacity .2s ease;
        z-index: 10020; /* 高於預覽卡片與一般內容 */
    }

    .delete-modal-overlay.show {
        opacity: 1;
        pointer-events: auto;
    }

    .delete-confirm-modal {
        position: fixed;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -40%) scale(.98);
        min-width: 320px;
        max-width: calc(100vw - 32px);
        background: var(--bg-primary);
        border: 1px solid var(--border-color);
        border-radius: 12px;
        box-shadow: var(--shadow-xl);
        opacity: 0;
        pointer-events: none;
        transition: transform .2s ease, opacity .2s ease;
        z-index: 10030; /* 高於覆蓋層與 Toast */
    }

    .delete-confirm-modal.show {
        opacity: 1;
        pointer-events: auto;
        transform: translate(-50%, -50%) scale(1);
    }

    .delete-modal-header {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 14px 16px;
        border-bottom: 1px solid var(--border-color);
        background: var(--bg-secondary);
    }

    .delete-modal-header .icon {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(239, 68, 68, 0.12);
        color: #ef4444;
        flex: 0 0 auto;
    }

    .delete-modal-header .text h3 {
        margin: 0;
        font-size: 16px;
        font-weight: 800;
        color: var(--text-primary);
        line-height: 1.2;
    }

    .delete-modal-header .text p {
        margin: 2px 0 0 0;
        font-size: 12px;
        color: var(--text-secondary);
    }

    .delete-modal-body {
        padding: 16px;
        color: var(--text-primary);
        background: var(--bg-primary);
    }

    .delete-modal-body .group-name {
        font-weight: 800;
        color: var(--primary-color);
    }

    .delete-modal-body .warning {
        margin: 10px 0 0 0;
        font-size: 12px;
        color: #ef4444;
    }

    .delete-modal-footer {
        display: flex;
        justify-content: flex-end;
        gap: 10px;
        padding: 12px 16px;
        border-top: 1px solid var(--border-color);
        background: var(--bg-secondary);
    }

    .delete-confirm-modal .btn-cancel,
    .delete-confirm-modal .btn-delete {
        border-radius: 10px;
        padding: 8px 14px;
        font-size: 14px;
        font-weight: 700;
        border: 1px solid var(--border-color);
        cursor: pointer;
        transition: all .15s ease;
    }

    .delete-confirm-modal .btn-cancel {
        background: var(--bg-tertiary);
        color: var(--text-primary);
    }

    .delete-confirm-modal .btn-cancel:hover {
        transform: translateY(-1px);
        background: var(--bg-hover);
    }

    .delete-confirm-modal .btn-delete {
        background: #ef4444;
        color: #fff;
        border-color: #ef4444;
    }

    .delete-confirm-modal .btn-delete:hover {
        transform: translateY(-1px);
        filter: brightness(0.95);
    }

    /* ============================================
           響應式設計
           ============================================ */
    @@media (max-width: 991.98px) {
        #group-buttons-container {
            justify-content: flex-start !important;
            flex-wrap: nowrap !important;
            overflow-x: auto;
            padding: 0 0.25rem 0.5rem;
            margin-left: -0.25rem;
            margin-right: -0.25rem;
            scroll-snap-type: x proximity;
            -webkit-overflow-scrolling: touch;
        }

        #group-buttons-container > .btn {
            flex: 0 0 auto;
            scroll-snap-align: start;
            max-width: min(82vw, 360px);
            white-space: nowrap;
        }

        .btn-purple {
            padding-right: 96px !important;
        }

        .group-label {
            display: inline-block;
            max-width: calc(82vw - 132px);
            overflow: hidden;
            text-overflow: ellipsis;
            vertical-align: bottom;
            white-space: nowrap;
        }
    }

    @@media (max-width: 768px) {
        h1.my-4 {
            font-size: 1.45rem;
            margin-top: 1rem !important;
            margin-bottom: 1rem !important;
        }

        .row-cols-2 > * {
            flex: 0 0 auto;
            width: 50%;
        }

        .card-body-compact {
            padding: 8px 10px;
        }

        .card-title {
            font-size: 0.9rem;
        }

        .card-subtitle {
            font-size: 0.8rem;
        }

        .mini-heart-btn {
            width: 36px;
            height: 36px;
        }

        .preview-group-panel.expanded {
            max-height: 280px;
        }

        .pgp-item .name {
            max-width: 140px;
        }

        .delete-confirm-modal {
            width: calc(100vw - 24px);
        }
    }

    @@media (max-width: 480px) {
        .container {
            padding-left: 0.25rem;
            padding-right: 0.25rem;
        }

        .row.g-3 {
            --bs-gutter-x: 0.65rem;
            --bs-gutter-y: 0.65rem;
        }

        .card {
            border-radius: 12px;
        }

        .card-img-top,
        .thumb-fallback {
            border-radius: 12px 12px 0 0;
        }

        .card-title {
            font-size: 0.86rem;
            line-height: 1.25;
        }

        .card-subtitle {
            font-size: 0.76rem;
        }

        .btn-purple {
            padding-left: 14px !important;
            padding-right: 88px !important;
        }

        .group-actions {
            gap: 6px;
            right: 6px;
        }

        .group-action-btn {
            width: 32px;
            height: 32px;
        }

        .hover-card-preview {
            display: none !important;
        }
    }