* {
        -webkit-tap-highlight-color: transparent;
        box-sizing: border-box;
    }

    @keyframes gradientFlow {

        0%,
        100% {
            background-position: 0% 50%;
        }

        50% {
            background-position: 100% 50%;
        }
    }

    body {
        background: linear-gradient(45deg, #ef4444, #3b82f6, #10b981, #f97316, #8b5cf6, #ec4899);
        background-size: 400% 400%;
        animation: gradientFlow 15s ease infinite;
        margin: 0;
        padding: 0;
        overflow: hidden;
    }

    .slide-image {
        max-width: 100%;
        max-height: 100%;
        object-fit: contain;
        background: white;
        border-radius: 12px;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
        transition: transform 0.3s ease;
        touch-action: pan-x pan-y;
    }

    /* Bottom Navigation Buttons Only */
    .bottom-nav-btn {
        position: fixed;
        bottom: 20px;
        width: 60px;
        height: 60px;
        border-radius: 50%;
        background: linear-gradient(135deg, rgba(59, 130, 246, 0.95), rgba(139, 92, 246, 0.95));
        color: white;
        border: none;
        font-size: 1.5rem;
        cursor: pointer;
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
        z-index: 200;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.3s ease;
        backdrop-filter: blur(10px);
    }

    .bottom-nav-btn:disabled {
        opacity: 0.3;
        cursor: not-allowed;
    }

    .bottom-nav-btn:not(:disabled):active {
        transform: scale(0.9);
    }

    .bottom-nav-prev {
        left: calc(50% - 70px);
    }

    .bottom-nav-next {
        right: calc(50% - 70px);
    }

    /* Sidebar - Desktop */
    .sidebar {
        position: fixed;
        top: 50%;
        right: -280px;
        transform: translateY(-50%);
        width: 270px;
        background: linear-gradient(180deg, rgba(59, 130, 246, 0.95), rgba(139, 92, 246, 0.95));
        border-radius: 20px 0 0 20px;
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.3);
        z-index: 150;
        transition: right 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
        backdrop-filter: blur(10px);
        padding: 15px;
        max-height: 90vh;
        overflow-y: auto;
    }

    .sidebar.open {
        right: 0;
    }

    /* Desktop Sidebar Container */
    .sidebar-desktop {
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    /* Mobile Sidebar Grid Container - Hidden by default */
    .sidebar-grid {
        display: none;
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: repeat(3, 1fr);
        gap: 10px;
        width: 100%;
        height: 100%;
    }

    /* Sidebar Toggle - Diperbaiki untuk terlihat */
    .sidebar-toggle {
        position: fixed;
        right: 15px;
        top: 50%;
        transform: translateY(-50%);
        width: 45px;
        height: 60px;
        background: linear-gradient(135deg, rgba(59, 130, 246, 0.95), rgba(139, 92, 246, 0.95));
        border: none;
        border-radius: 15px;
        color: white;
        font-size: 1.2rem;
        cursor: pointer;
        box-shadow: -3px 0 10px rgba(0, 0, 0, 0.2);
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.3s ease;
        z-index: 250;
    }

    .sidebar-toggle:active {
        transform: translateY(-50%) scale(0.95);
    }

    /* Sidebar Buttons */
    .sidebar-btn {
        width: 50px;
        height: 50px;
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.2);
        border: none;
        color: white;
        font-size: 1.3rem;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.3s ease;
        position: relative;
        text-decoration: none;
        margin: 0 auto;
    }

    .sidebar-btn:active {
        transform: scale(0.9);
        background: rgba(255, 255, 255, 0.3);
    }

    .sidebar-btn.active {
        background: rgba(255, 255, 255, 0.4);
    }

    /* Sidebar Divider */
    .sidebar-divider {
        height: 1px;
        background: rgba(255, 255, 255, 0.3);
        margin: 10px auto;
        width: 40px;
    }

    .sound-on {
        color: #10b981;
    }

    .sound-off {
        color: #ef4444;
    }

    .bgm-on {
        color: #fbbf24;
    }

    .bgm-off {
        color: #9ca3af;
    }

    /* Slide info badge */
    .slide-info {
        position: fixed;
        top: 20px;
        left: 50%;
        transform: translateX(-50%);
        background: rgba(0, 0, 0, 0.7);
        backdrop-filter: blur(10px);
        color: white;
        padding: 10px 20px;
        border-radius: 25px;
        font-size: 0.9rem;
        font-weight: 600;
        z-index: 100;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    }

    /* Zoom indicator */
    .zoom-indicator {
        position: fixed;
        bottom: 90px;
        left: 50%;
        transform: translateX(-50%);
        background: rgba(0, 0, 0, 0.7);
        backdrop-filter: blur(10px);
        color: white;
        padding: 8px 16px;
        border-radius: 20px;
        font-size: 0.85rem;
        z-index: 100;
        display: flex;
        align-items: center;
        gap: 8px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    }

    /* Help button */
    .help-btn {
        position: fixed;
        top: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        border-radius: 50%;
        background: linear-gradient(135deg, #3b82f6, #8b5cf6);
        color: white;
        border: none;
        font-size: 1.3rem;
        cursor: pointer;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
        z-index: 100;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.3s ease;
    }

    .help-btn:active {
        transform: scale(0.9);
    }

    /* Modal */
    .modal-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.85);
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 9999;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        padding: 1rem;
    }

    .modal-overlay.active {
        opacity: 1;
        visibility: visible;
    }

    .modal-content {
        background: white;
        border-radius: 20px;
        padding: 1.5rem;
        max-width: 500px;
        width: 100%;
        max-height: 85vh;
        overflow-y: auto;
        transform: scale(0.9);
        transition: transform 0.3s ease;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    }

    .modal-overlay.active .modal-content {
        transform: scale(1);
    }

    /* Slide viewer */
    .slide-viewer {
        position: fixed;
        inset: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 20px;
        overflow: auto;
    }

    /* Volume slider popup */
    .volume-popup {
        position: absolute;
        bottom: 60px;
        right: 10px;
        background: rgba(0, 0, 0, 0.9);
        backdrop-filter: blur(10px);
        padding: 15px;
        border-radius: 15px;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    }

    .volume-popup.show {
        opacity: 1;
        visibility: visible;
    }

    .volume-label {
        color: white;
        font-size: 0.75rem;
        text-align: center;
        margin-bottom: 80px;
    }

    input[type="range"] {
        -webkit-appearance: none;
        appearance: none;
        width: 120px;
        height: 8px;
        border-radius: 4px;
        background: rgba(255, 255, 255, 0.3);
        outline: none;
        transform: rotate(-90deg);
        transform-origin: center;
    }

    input[type="range"]::-webkit-slider-thumb {
        -webkit-appearance: none;
        appearance: none;
        width: 20px;
        height: 20px;
        border-radius: 50%;
        background: white;
        cursor: pointer;
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    }

    input[type="range"]::-moz-range-thumb {
        width: 20px;
        height: 20px;
        border-radius: 50%;
        background: white;
        cursor: pointer;
        border: none;
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    }

    .keyboard-shortcut {
        display: inline-block;
        background: #f3f4f6;
        border: 1px solid #d1d5db;
        border-radius: 4px;
        padding: 2px 6px;
        font-size: 0.75rem;
        font-family: monospace;
        color: #374151;
    }

    /* Drag cursor */
    .slide-viewer.dragging {
        cursor: grabbing;
    }

    .slide-viewer.draggable {
        cursor: grab;
    }

    /* Game Icon Button */
    .game-button {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        background: linear-gradient(135deg, #f59e0b, #d97706);
        color: white;
        border: none;
        border-radius: 50%;
        width: 120px;
        height: 120px;
        font-size: 3rem;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        z-index: 300;
        transition: all 0.3s ease;
        animation: pulse 2s infinite;
        text-decoration: none;
    }

    .game-button:hover {
        transform: translate(-50%, -50%) scale(1.1);
        box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
    }

    .game-button:active {
        transform: translate(-50%, -50%) scale(0.95);
    }

    /* Slide List Item */
    .slide-item {
        display: flex;
        align-items: center;
        padding: 12px;
        border-radius: 8px;
        cursor: pointer;
        transition: all 0.2s ease;
    }

    .slide-item:hover {
        background-color: #f3f4f6;
    }

    .slide-item.active {
        background-color: #dbeafe;
        border-left: 4px solid #3b82f6;
    }

    .slide-number {
        width: 30px;
        height: 30px;
        background-color: #3b82f6;
        color: white;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: bold;
        margin-right: 12px;
        flex-shrink: 0;
    }

    .slide-description {
        font-size: 0.9rem;
        color: #374151;
    }

    .slide-list-container {
        max-height: 60vh;
        overflow-y: auto;
    }

    /* Start Button - Diperbaiki untuk selalu muncul di Slide 6 */
    .start-button {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        background: linear-gradient(135deg, #f59e0b, #d97706);
        color: white;
        border: none;
        border-radius: 30%;
        width: 120px;
        height: 120px;
        font-size: 1.2rem;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        z-index: 300;
        transition: all 0.3s ease;
        animation: pulse 2s infinite;
        text-decoration: none;
    }

    .button-content {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        z-index: 2;
        position: relative;
        width: 100%;
        height: 100%;
    }

    .start-button::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
        transition: left 0.5s;
    }

    .start-button:hover::before {
        left: 100%;
    }

    .start-button:hover {
        transform: translate(-50%, -50%) scale(1.05);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
        background: linear-gradient(135deg, #059669, #047857);
    }

    .start-button:active {
        transform: translate(-50%, -50%) scale(0.98);
    }

    .start-button i {
        font-size: 1.5rem;
        animation: pulse 2s infinite;
    }

    .start-button span {
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        letter-spacing: 0.5px;
    }

    @keyframes pulse {
        0% {
            transform: scale(1);
            opacity: 1;
        }

        50% {
            transform: scale(1.1);
            opacity: 0.8;
        }

        100% {
            transform: scale(1);
            opacity: 1;
        }
    }

    /* Ripple effect */
    .button-ripple {
        position: absolute;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.5);
        transform: scale(0);
        animation: ripple 0.6s ease-out;
        z-index: 1;
    }

    @keyframes ripple {
        to {
            transform: scale(4);
            opacity: 0;
        }
    }

    /* Glow effect */
    .start-button {
        box-shadow: 0 0 20px rgba(16, 185, 129, 0.5);
    }

    .start-button:hover {
        box-shadow: 0 0 30px rgba(16, 185, 129, 0.7);
    }

    /* Mobile Styles */
    @media (max-width: 768px) {

        /* Sidebar - Mobile */
        .sidebar {
            width: 240px;
            height: 240px;
            right: -260px;
            top: 50%;
            transform: translateY(-50%);
            border-radius: 20px;
            padding: 15px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        .sidebar.open {
            right: 10px;
        }

        /* Hide desktop sidebar, show mobile grid */
        .sidebar-desktop {
            display: none;
        }

        .sidebar-grid {
            display: grid;
        }

        /* Sidebar Toggle - Mobile */
        .sidebar-toggle {
            position: fixed;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            width: 40px;
            height: 50px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.95), rgba(139, 92, 246, 0.95));
            border: none;
            border-radius: 15px;
            color: white;
            font-size: 1.1rem;
            cursor: pointer;
            box-shadow: -3px 0 10px rgba(0, 0, 0, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            z-index: 250;
        }

        /* Sidebar Buttons - Mobile Grid */
        .grid-btn {
            width: 100%;
            height: 100%;
            margin: 0;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.2);
            border: none;
            color: white;
            font-size: 1.3rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            position: relative;
            text-decoration: none;
        }

        /* Volume Popup - Mobile */
        .volume-popup {
            position: fixed;
            bottom: 20px;
            right: 20px;
            height: auto;
            width: 200px;
            padding: 15px;
            border-radius: 15px;
            transform: translateY(100px);
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
        }

        .volume-popup.show {
            transform: translateY(0);
            opacity: 1;
            visibility: visible;
        }

        .volume-label {
            margin-bottom: 15px;
        }

        input[type="range"] {
            width: 100%;
            height: 8px;
            transform: none;
            margin: 10px 0;
        }

        /* Other mobile adjustments */
        .bottom-nav-btn {
            width: 50px;
            height: 50px;
            font-size: 1.2rem;
        }

        .bottom-nav-prev {
            left: calc(50% - 60px);
        }

        .bottom-nav-next {
            right: calc(50% - 60px);
        }

        .help-btn {
            width: 45px;
            height: 45px;
            font-size: 1.1rem;
            top: 15px;
            right: 15px;
        }

        .slide-info {
            top: 15px;
            font-size: 0.8rem;
            padding: 8px 16px;
        }

        .zoom-indicator {
            bottom: 85px;
            font-size: 0.75rem;
            padding: 6px 12px;
        }

        .game-button {
            width: 100px;
            height: 100px;
            font-size: 2.5rem;
        }

        .start-button {
            width: 160px;
            height: 55px;
        }
    }

    @media (orientation: landscape) and (max-height: 500px) {
        .sidebar {
            width: 75px;
            height: 200px;
            right: -220px;
            z-index: 9999;

        }

        .sidebar-grid {
            gap: 8px;
        }

        .grid-btn {
            font-size: 1.1rem;
        }

        .slide-info {
            top: 10px;
            padding: 6px 12px;
            font-size: 0.75rem;
        }

        .help-btn {
            width: 40px;
            height: 40px;
            top: 10px;
            right: 10px;
            font-size: 1rem;
        }

        .bottom-nav-btn {
            width: 45px;
            height: 45px;
            font-size: 1.1rem;
        }

        .game-button {
            width: 80px;
            height: 80px;
            font-size: 2rem;
        }

        .start-button {
            width: 140px;
            height: 50px;
        }
    }

    @keyframes pulse {

        0%,
        100% {
            opacity: 1;
        }

        50% {
            opacity: 0.5;
        }
    }

    .loading {
        animation: pulse 1.5s ease-in-out infinite;
    }

    .hidden {
        display: none !important;
    }

    .dubbing {
        display: block;
    }

    .nodubbing {
        display: none;
    }