:root {
            --bg-color: #0a0a0a;
            --text-color: #ffffff;
            --accent-color: #00e4ff;
            --secondary-color: #ff7b00;
            --board-bg: #121212;
            --success-color: #4CAF50;
            --error-color: #ff4444;
            --panel-bg: #1e1e1e;
            --glow-color: rgba(0, 228, 255, 0.5);
            --button-bg: linear-gradient(45deg, var(--accent-color), var(--secondary-color));
        }
        [data-board-theme="neon"] {
            --board-bg: #0a0a1a;
            --accent-color: #00ffcc;
            --secondary-color: #ff00cc;
            --glow-color: rgba(0, 255, 204, 0.5);
            --button-bg: linear-gradient(45deg, #00ffcc, #ff00cc);
        }
        [data-board-theme="cosmic"] {
            --board-bg: #1a0033;
            --accent-color: #cc00ff;
            --secondary-color: #6600cc;
            --glow-color: rgba(204, 0, 255, 0.5);
            --button-bg: linear-gradient(45deg, #cc00ff, #6600cc);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: 'Inter', sans-serif;
            background: linear-gradient(145deg, var(--bg-color), #141414);
            color: var(--text-color);
            min-height: 100vh;
            padding: 20px;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .container {
            max-width: 1000px;
            width: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
        }
        #game-canvas {
            border: 4px solid var(--accent-color);
            border-radius: 20px;
            box-shadow: 0 0 50px var(--glow-color);
            background: radial-gradient(circle at center, #222, var(--board-bg));
            width: 100%;
            max-width: 800px;
            height: 600px;
            touch-action: none;
            transition: all 0.3s ease;
            position: relative;
        }
        #balance-overlay {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--button-bg);
            padding: 12px 30px;
            border-radius: 12px;
            font-size: 18px;
            font-weight: 700;
            box-shadow: 0 0 20px var(--glow-color);
            z-index: 1000;
            color: #1a1a1a;
        }
        #ui {
            background: var(--panel-bg);
            border-radius: 20px;
            padding: 25px;
            width: 100%;
            max-width: 800px;
            box-shadow: 0 0 25px rgba(0, 0, 0, 0.8);
            display: grid;
            gap: 20px;
        }
        .input-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }
        .input-group {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        label {
            font-size: 14px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--accent-color);
        }
        input[type="number"], input[type="range"], select {
            padding: 12px;
            font-size: 15px;
            border: 2px solid var(--accent-color);
            border-radius: 10px;
            background: #252525;
            color: var(--text-color);
            width: 100%;
            transition: all 0.3s ease;
        }
        input[type="range"] {
            cursor: pointer;
            accent-color: var(--accent-color);
        }
        input:focus, select:focus {
            border-color: var(--secondary-color);
            box-shadow: 0 0 15px var(--glow-color);
            outline: none;
            background: #303030;
        }
        .button {
            padding: 14px 30px;
            font-size: 15px;
            font-weight: 700;
            background: var(--button-bg);
            color: #1a1a1a;
            border: none;
            border-radius: 10px;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
        }
        .button::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            background: rgba(255, 255, 255, 0.4);
            border-radius: 50%;
            transform: translate(-50%, -50%);
            transition: all 0.5s ease;
        }
        .button:hover::before {
            width: 400px;
            height: 400px;
        }
        .button:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 0 25px var(--glow-color);
        }
        .button:disabled {
            background: #444;
            cursor: not-allowed;
            color: #888;
            transform: none;
            box-shadow: none;
        }
        .preset-button {
            padding: 10px 25px;
            font-size: 13px;
            margin: 4px;
        }
        .tabs {
            display: flex;
            gap: 12px;
            margin-bottom: 20px;
            justify-content: center;
            flex-wrap: wrap;
            background: #181818;
            padding: 10px;
            border-radius: 12px;
        }
        .tab {
            padding: 12px 25px;
            border-radius: 10px;
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            transition: all 0.3s ease;
        }
        .tab.active {
            background: var(--accent-color);
            color: #1a1a1a;
            transform: scale(1.05);
        }
        .tab:hover {
            background: #222;
            color: var(--accent-color);
        }
        .tab-content {
            display: none;
        }
        .tab-content.active {
            display: block;
        }
        .stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
        }
        .stat-card {
            background: linear-gradient(145deg, #181818, #222);
            padding: 25px;
            border-radius: 12px;
            text-align: center;
            font-size: 14px;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            gap: 10px;
            align-items: center;
            border: 1px solid rgba(0, 228, 255, 0.3);
        }
        .stat-card:hover {
            box-shadow: 0 0 20px var(--glow-color);
            transform: translateY(-3px);
        }
        .stat-card.updated {
            animation: pulse 0.8s;
        }
        .stat-card::before {
            font-size: 24px;
            margin-bottom: 8px;
        }
        .stat-card.win::before { content: '🏆'; }
        .stat-card.highest-win::before { content: '🌟'; }
        .stat-card.total-balls::before { content: '⚽'; }
        .stat-card.avg-win::before { content: '📊'; }
        .stat-card.win-rate::before { content: '🎯'; }
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.06); }
            100% { transform: scale(1); }
        }
        .panel {
            max-height: 300px;
            overflow-y: auto;
            background: #181818;
            border-radius: 12px;
            padding: 20px;
            border: 1px solid rgba(0, 228, 255, 0.3);
        }
        .history-item, .win-item {
            padding: 12px;
            font-size: 13px;
            border-bottom: 1px solid #333;
            transition: background 0.3s;
        }
        .history-item:hover, .win-item:hover {
            background: #222;
        }
        .achievement {
            background: var(--success-color);
            padding: 15px;
            border-radius: 10px;
            margin-top: 10px;
            animation: slideIn 0.8s;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 14px;
        }
        @keyframes slideIn {
            from { transform: translateX(-100%); opacity: 0; }
            to { transform: translateX(0); opacity: 1; }
        }
        .warning {
            background: var(--error-color);
            padding: 15px;
            border-radius: 10px;
            margin-top: 10px;
            text-align: center;
            animation: slideIn 0.8s;
            font-size: 14px;
        }
        .tutorial-toggle {
            position: fixed;
            top: 20px;
            right: 20px;
            padding: 15px;
            background: var(--accent-color);
            border-radius: 50%;
            cursor: pointer;
            box-shadow: 0 0 20px var(--glow-color);
            font-size: 20px;
            animation: pulseGlow 2s infinite;
            color: #1a1a1a;
        }
        @keyframes pulseGlow {
            0% { transform: scale(1); box-shadow: 0 0 20px var(--glow-color); }
            50% { transform: scale(1.15); box-shadow: 0 0 30px var(--glow-color); }
            100% { transform: scale(1); box-shadow: 0 0 20px var(--glow-color); }
        }
        #tutorial-overlay, #reset-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.95);
            color: #fff;
            padding: 40px;
            text-align: center;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            z-index: 1000;
        }
        #tutorial-overlay.active, #reset-overlay.active {
            display: flex;
        }
        #tutorial-overlay .content, #reset-overlay .content {
            max-width: 700px;
            background: var(--panel-bg);
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 0 30px var(--glow-color);
        }
        #tutorial-overlay h2, #reset-overlay h2 {
            font-size: 28px;
            margin-bottom: 20px;
            color: var(--accent-color);
        }
        #tutorial-overlay p, #reset-overlay p {
            font-size: 16px;
            line-height: 1.6;
            margin-bottom: 25px;
        }
        #tutorial-overlay .tutorial-step {
            display: none;
            text-align: left;
        }
        #tutorial-overlay .tutorial-step.active {
            display: block;
        }
        #tutorial-overlay .tutorial-nav {
            display: flex;
            gap: 15px;
            justify-content: center;
        }
        [data-tooltip] {
            position: relative;
        }
        [data-tooltip]:hover::after {
            content: attr(data-tooltip);
            position: absolute;
            bottom: calc(100% + 10px);
            left: 50%;
            transform: translateX(-50%);
            background: #333;
            color: #fff;
            padding: 10px 15px;
            border-radius: 8px;
            font-size: 13px;
            white-space: nowrap;
            z-index: 10;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.6);
        }
        .win-popup {
            position: absolute;
            color: var(--success-color);
            font-size: 20px;
            font-weight: 700;
            animation: floatUp 1.5s ease-out forwards;
            z-index: 10;
            text-shadow: 0 0 10px rgba(0, 0, 0, 0.6);
        }
        @keyframes floatUp {
            0% { opacity: 1; transform: translateY(0); }
            100% { opacity: 0; transform: translateY(-80px); }
        }
        .progress-bar {
            width: 100%;
            height: 12px;
            background: #333;
            border-radius: 6px;
            overflow: hidden;
            margin-top: 8px;
        }
        .progress-bar-fill {
            height: 100%;
            background: var(--accent-color);
            transition: width 0.6s ease;
        }
        .auto-play-controls {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .auto-play-status {
            font-size: 13px;
            color: var(--accent-color);
            text-align: center;
        }
        .control-label {
            font-size: 12px;
            color: #bbb;
            text-align: center;
            margin-top: 5px;
        }
        @media (max-width: 768px) {
            body {
                padding: 15px;
            }
            #game-canvas {
                height: 450px;
                border-radius: 15px;
            }
            #balance-overlay {
                font-size: 16px;
                padding: 10px 25px;
                border-radius: 10px;
                top: 15px;
            }
            #ui {
                padding: 20px;
                border-radius: 15px;
            }
            .input-section {
                grid-template-columns: 1fr;
                gap: 15px;
            }
            .input-group {
                gap: 8px;
            }
            label {
                font-size: 13px;
            }
            input[type="number"], input[type="range"], select {
                padding: 10px;
                font-size: 14px;
                border-radius: 8px;
            }
            .button {
                padding: 12px 25px;
                font-size: 14px;
                border-radius: 8px;
            }
            .preset-button {
                padding: 8px 20px;
                font-size: 12px;
                margin: 3px;
            }
            .tabs {
                gap: 10px;
                padding: 8px;
                border-radius: 10px;
            }
            .tab {
                padding: 10px 20px;
                font-size: 14px;
                border-radius: 8px;
            }
            .stats {
                grid-template-columns: 1fr;
                gap: 15px;
            }
            .stat-card {
                padding: 20px;
                font-size: 13px;
                border-radius: 10px;
            }
            .panel {
                max-height: 250px;
                padding: 15px;
                border-radius: 10px;
            }
            .history-item, .win-item {
                padding: 10px;
                font-size: 12px;
            }
            .achievement, .warning {
                padding: 12px;
                font-size: 13px;
                border-radius: 8px;
            }
            .tutorial-toggle {
                top: 15px;
                right: 15px;
                padding: 12px;
                font-size: 18px;
            }
            #tutorial-overlay, #reset-overlay {
                padding: 20px;
            }
            #tutorial-overlay h2, #reset-overlay h2 {
                font-size: 24px;
            }
            #tutorial-overlay p, #reset-overlay p {
                font-size: 15px;
            }
            .win-popup {
                font-size: 18px;
            }
        }
        @media (max-width: 480px) {
            #game-canvas {
                height: 350px;
                border-radius: 12px;
            }
            #balance-overlay {
                font-size: 14px;
                padding: 8px 20px;
                border-radius: 8px;
                top: 10px;
            }
            #ui {
                padding: 15px;
                border-radius: 12px;
            }
            label {
                font-size: 12px;
            }
            input[type="number"], input[type="range"], select {
                padding: 8px;
                font-size: 13px;
                border-radius: 6px;
            }
            .button {
                padding: 10px 20px;
                font-size: 13px;
                border-radius: 6px;
            }
            .preset-button {
                padding: 6px 15px;
                font-size: 11px;
            }
            .tabs {
                gap: 8px;
                padding: 6px;
            }
            .tab {
                padding: 8px 15px;
                font-size: 13px;
                border-radius: 6px;
            }
            .stats {
                gap: 12px;
            }
            .stat-card {
                padding: 15px;
                font-size: 12px;
                border-radius: 8px;
            }
            .panel {
                max-height: 200px;
            }
            .history-item, .win-item {
                padding: 8px;
                font-size: 11px;
            }
            .achievement, .warning {
                padding: 10px;
                font-size: 12px;
                border-radius: 6px;
            }
            .tutorial-toggle {
                top: 10px;
                right: 10px;
                padding: 10px;
                font-size: 16px;
            }
            #tutorial-overlay h2, #reset-overlay h2 {
                font-size: 20px;
            }
            #tutorial-overlay p, #reset-overlay p {
                font-size: 14px;
            }
            .win-popup {
                font-size: 16px;
            }
        }