/* Universal HTML Element Controls */
        .nqt-cover-icon, .nqt-title-marquee, .nqt-divider { display: none; }
        .nqt-player-body { flex: 1; display: flex; align-items: center; min-width: 0; }
        .nqt-progress-wrapper { flex: 1; display: flex; align-items: center; width: 100%; gap: 12px; }
        
        /* 1. Phong cách "Viên thuốc" */
        .nqt-style-1 {
            background: #ffffff; border-radius: 50px; box-shadow: 0 4px 15px rgba(0,0,0,0.06); border: 1px solid #f1f5f9; gap: 12px;
        }
        .nqt-style-1 .nqt-playback-button {
            background: #0073a8; border-radius: 50%; width: 42px; height: 42px;
        }
        .nqt-style-1 .nqt-progress-bar {
            height: 6px; border-radius: 3px; background: #e2e8f0; flex: 1;
        }
        .nqt-style-1 .nqt-progress-bar-filled { background: #0073a8; }
        .nqt-style-1 .nqt-playback-time { color: #64748b; font-size: 13px; font-weight: 500; }
        .nqt-style-1 .nqt-voice-btn { color: #64748b; margin-left: 0; }

        /* 2. Phong cách "Dark Mode" */
        .nqt-style-2 {
            background: #111827; border-radius: 50px; box-shadow: 0 4px 20px rgba(0,0,0,0.3); border: 1px solid #374151; color: #f9fafb; gap: 12px;
        }
        .nqt-style-2 .nqt-playback-button {
            background: #10b981; border-radius: 50%; width: 44px; height: 44px; color: #111827;
        }
        .nqt-style-2 .nqt-progress-bar {
            height: 5px; border-radius: 3px; background: #374151; flex: 1;
        }
        .nqt-style-2 .nqt-progress-bar-filled { background: #10b981; }
        .nqt-style-2 .nqt-playback-time { color: #9ca3af; font-size: 13px; font-weight: 500; }
        .nqt-style-2 .nqt-voice-btn { color: #9ca3af; margin-left: 0; }
        .nqt-style-2 .nqt-vp-header { background: #1f2937; color: #d1d5db; border-color: #374151; }
        .nqt-style-2 .nqt-voice-picker { background: #111827; border-color: #374151; color: #e5e7eb; }
        .nqt-style-2 .nqt-vp-item:hover { background: #374151; }
        .nqt-style-2 .nqt-vp-item.nqt-vp-active { background: #064e3b; color: #34d399; }
        .nqt-style-2 .nqt-vp-group-title { color: #6b7280; }

        /* 3. Phong cách "Thẻ Mini" */
        .nqt-style-3 {
            background: #ffffff; border-radius: 16px; box-shadow: 0 4px 25px rgba(0,0,0,0.08); border: 1px solid #f1f5f9; padding: 14px; gap: 14px;
        }
        .nqt-style-3 .nqt-cover-icon {
            display: flex; align-items: center; justify-content: center; width: 48px; height: 48px; background: #eff6ff; color: #3b82f6; border-radius: 12px; flex-shrink: 0;
        }
        .nqt-style-3 .nqt-player-body { flex-direction: column; align-items: flex-start; justify-content: center; gap: 6px; }
        .nqt-style-3 .nqt-title-marquee { display: block; font-weight: 600; font-size: 14px; color: #0f172a; max-width: 100%; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; line-height: 1.2; }
        .nqt-style-3 .nqt-progress-wrapper { gap: 8px; }
        .nqt-style-3 .nqt-progress-bar { height: 4px; border-radius: 2px; background: #f1f5f9; flex: 1; }
        .nqt-style-3 .nqt-progress-bar-filled { background: #4f46e5; }
        .nqt-style-3 .nqt-playback-time { color: #64748b; font-size: 11px; }
        .nqt-style-3 .nqt-voice-btn { order: 4; color: #94a3b8; margin: 0 6px; }
        .nqt-style-3 .nqt-playback-button {
            order: 5; background: #f8fafc; color: #4f46e5; border-radius: 50%; width: 42px; height: 42px; flex-shrink: 0;
        }
        .nqt-style-3 .nqt-playback-button:hover { background: #eff6ff; }

        /* 4. Phong cách "Phẳng tối giản" */
        .nqt-style-4 {
            background: transparent; padding: 8px 0; gap: 16px;
        }
        .nqt-style-4 .nqt-playback-button {
            background: transparent; color: #1e293b; width: 32px; height: 32px;
        }
        .nqt-style-4 .nqt-progress-bar {
            height: 4px; background: #e2e8f0; border-radius: 2px; flex: 1;
        }
        .nqt-style-4 .nqt-progress-bar-filled { background: #1e293b; }
        .nqt-style-4 .nqt-playback-time { color: #64748b; font-size: 13px; font-variant-numeric: tabular-nums; }
        .nqt-style-4 .nqt-voice-btn { color: #94a3b8; }

        /* 5. Phong cách "Tối giản" */
        .nqt-style-5.nqt-playback-container {
            background: #ffffff; border-radius: 50px; box-shadow: 0 6px 16px rgba(0,0,0,0.08); border: 1px solid #f1f5f9; 
            padding: 6px; width: max-content; margin: 0; justify-content: center; gap: 8px;
        }
        .nqt-wrap-auto .nqt-style-5.nqt-playback-container { margin: 0 auto; }
        .nqt-style-5 .nqt-playback-button {
            background: #ef4444; border-radius: 50%; width: 44px; height: 44px;
        }
        .nqt-style-5 .nqt-player-body { display: none !important; }
        .nqt-style-5 .nqt-divider {
            display: block; width: 1px; height: 24px; background: #e2e8f0; margin: 0 4px;
        }
        .nqt-style-5 .nqt-voice-btn { color: #64748b; margin-right: 8px; margin-left: 0; }

        /* Shared Container Properties */
        .nqt-tts-wrapper {
            z-index: 99999;
            box-sizing: border-box;
            transition: all 0.3s ease;
        }

        /* Layout Positions extracted from styles */
        .nqt-wrap-auto.nqt-pos-bottom-center { position: fixed; bottom: 25px; left: 50%; transform: translateX(-50%); width: 90%; max-width: 440px; }
        .nqt-wrap-auto.nqt-pos-bottom-left { position: fixed; bottom: 25px; left: 25px; width: 90%; max-width: 440px; }
        .nqt-wrap-auto.nqt-pos-bottom-right { position: fixed; bottom: 25px; right: 25px; width: 90%; max-width: 440px; }
        .nqt-wrap-shortcode { position: relative; width: 100%; max-width: 600px; margin: 20px 0; }

        .nqt-playback-container {
            position: relative;
            display: flex;
            align-items: center;
            padding: 10px 16px;
            font-family: system-ui, -apple-system, sans-serif;
            box-sizing: border-box;
            width: 100%;
        }

        .nqt-playback-button {
            color: white;
            border: none;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            flex-shrink: 0;
            transition: all 0.2s;
            outline: none;
        }
        .nqt-loading {
            border: 2px solid #ffffff;
            border-bottom-color: transparent;
            border-radius: 50%;
            display: inline-block;
            box-sizing: border-box;
            animation: nqt-rotation 1s linear infinite;
        }
        @keyframes nqt-rotation {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        .nqt-progress-bar {
            flex: 1;
            overflow: hidden;
            cursor: pointer;
            position: relative;
            transition: all 0.2s;
        }
        .nqt-progress-bar-filled {
            height: 100%;
            width: 0%;
            transition: width 0.1s linear;
        }
        .nqt-playback-time {
            font-size: 13px;
            white-space: nowrap;
            text-align: right;
            font-variant-numeric: tabular-nums;
        }

        /* Voice picker button */
        .nqt-voice-btn {
            background: none;
            border: none;
            cursor: pointer;
            font-size: 18px;
            padding: 4px 6px;
            margin-left: 8px;
            flex-shrink: 0;
            opacity: 0.6;
            transition: opacity 0.2s, transform 0.2s;
            line-height: 1;
        }
        .nqt-voice-btn:hover { opacity: 1; transform: scale(1.15); }

        /* Voice picker dropdown */
        .nqt-voice-picker {
            position: absolute;
            bottom: calc(100% + 8px);
            right: 0;
            width: 280px;
            max-height: 360px;
            overflow-y: auto;
            background: #fff;
            border: 1px solid #e2e8f0;
            border-radius: 12px;
            box-shadow: 0 12px 40px rgba(0,0,0,0.15);
            z-index: 100000;
            display: none;
            font-size: 13px;
            color: #1e293b;
        }
        .nqt-voice-picker.nqt-vp-open { display: block; animation: nqtFadeIn 0.15s ease; }
        @keyframes nqtFadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

        .nqt-vp-header {
            padding: 10px 14px;
            font-weight: 600;
            font-size: 13px;
            color: #64748b;
            border-bottom: 1px solid #f1f5f9;
            position: sticky;
            top: 0;
            background: #fff;
            border-radius: 12px 12px 0 0;
        }
        .nqt-vp-group {
            padding: 6px 0;
        }
        .nqt-vp-group-title {
            padding: 6px 14px 4px;
            font-size: 11px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            color: #94a3b8;
        }
        .nqt-vp-item {
            padding: 8px 14px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            transition: background 0.1s;
        }
        .nqt-vp-item:hover { background: #f8fafc; }
        .nqt-vp-item.nqt-vp-active { background: #eff6ff; color: #1d4ed8; font-weight: 600; }
        .nqt-vp-item .nqt-vp-check { display: none; font-size: 14px; }
        .nqt-vp-item.nqt-vp-active .nqt-vp-check { display: inline; }
        .nqt-vp-item-name { flex: 1; }
        .nqt-vp-item-badge {
            font-size: 10px;
            padding: 2px 6px;
            border-radius: 4px;
            margin-left: 6px;
            font-weight: 600;
        }
        .nqt-vp-badge-browser { background: #dcfce7; color: #166534; }
        .nqt-vp-badge-ai { background: #dbeafe; color: #1e40af; }

        /* Scrollbar */
        .nqt-voice-picker::-webkit-scrollbar { width: 5px; }
        .nqt-voice-picker::-webkit-scrollbar-track { background: transparent; }
        .nqt-voice-picker::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }

        @media (max-width: 480px) {
            .nqt-wrap-auto.nqt-pos-bottom-center, .nqt-wrap-auto.nqt-pos-bottom-left, .nqt-wrap-auto.nqt-pos-bottom-right { width: 90%; left: 5%; right: 5%; transform: none; bottom: 20px; }
            .nqt-voice-picker { width: 260px; }
        }