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

        body {
            font-family: 'Arial', sans-serif;
            background-color: #f5f5f5;
            height: 100vh;
            overflow: hidden;
        }

        /* Splash Screen */
        .splash-screen {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #1e3c72, #2a5298);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            z-index: 100;
            transition: opacity 0.5s;
        }

        .splash-screen.hidden {
            opacity: 0;
            pointer-events: none;
        }

        .logo {
            width: 150px;
            height: 150px;
            background-color: white;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            margin-bottom: 30px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
        }

        .logo img {
            width: 100%;
            height: 100%;
        }

        .game-title {
            color: white;
            font-size: 2.5rem;
            margin-bottom: 20px;
            text-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
        }

        .play-btn {
            padding: 15px 40px;
            font-size: 1.2rem;
            background-color: #4CAF50;
            color: white;
            border: none;
            border-radius: 50px;
            cursor: pointer;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
            transition: transform 0.2s, background-color 0.2s;
        }

        .play-btn:hover {
            background-color: #45a049;
            transform: scale(1.05);
        }

        /* Game Container */
        .game-container {
            display: none;
            flex-direction: column;
            align-items: center;
            padding: 20px;
            height: 100vh;
            max-width: 100%;
            overflow: auto;
        }

        /* Game Header */
        .game-header {
            display: flex;
            justify-content: space-between;
            width: 100%;
            max-width: 500px;
            margin-bottom: 15px;
        }

        .timer, .turn-count {
            background-color: white;
            padding: 10px 20px;
            border-radius: 20px;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
            font-weight: bold;
        }

        /* Board */
        .board {
            display: grid;
            grid-template-columns: repeat(8, 1fr);
            grid-template-rows: repeat(8, 1fr);
            aspect-ratio: 1/1;
            width: 100%;
            max-width: 500px;
            max-height: 500px;
            border: 3px solid #333;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        .cell {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }

        .dark {
            background-color: #769656;
        }

        .light {
            background-color: #eeeed2;
        }

        .piece {
            width: 80%;
            height: 80%;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            position: relative;
            z-index: 1;
            box-shadow: 0 3px 6px rgba(0, 0, 0, 0.3);
            transition: transform 0.2s;
        }

        .piece:hover {
            transform: scale(1.1);
        }

        .player {
            background-color: #333;
            border: 2px solid #111;
        }

        .player.king {
            background: radial-gradient(circle at center, #555 30%, #333 70%);
            border: 2px solid gold;
        }

        .ai {
            background-color: #c33;
            border: 2px solid #911;
        }

        .ai.king {
            background: radial-gradient(circle at center, #e55 30%, #c33 70%);
            border: 2px solid gold;
        }

        .selected {
            box-shadow: 0 0 15px 5px rgba(255, 255, 0, 0.7);
        }

        .valid-move {
            box-shadow: inset 0 0 15px 5px rgba(0, 255, 0, 0.5);
        }

        .valid-capture {
            box-shadow: inset 0 0 15px 5px rgba(255, 0, 0, 0.5);
        }

        /* Game Controls */
        .controls {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }

        .btn {
            padding: 12px 25px;
            font-size: 1rem;
            color: white;
            border: none;
            border-radius: 25px;
            cursor: pointer;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
            transition: transform 0.2s;
        }

        .btn:hover {
            transform: scale(1.05);
        }

        .new-game-btn {
            background-color: #4CAF50;
        }

        /* Status */
        .status {
            margin-top: 15px;
            font-size: 1.2rem;
            font-weight: bold;
            color: #333;
        }

        /* Result Screen */
        .result-screen {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.8);
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            z-index: 200;
        }

        .result-content {
            background-color: white;
            padding: 30px;
            border-radius: 20px;
            text-align: center;
            max-width: 90%;
            width: 400px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }

        .result-image {
            width: 150px;
            height: 150px;
            margin: 0 auto 20px;
        }

        .result-title {
            font-size: 2rem;
            margin-bottom: 10px;
            color: #333;
        }

        .win-title {
            color: #4CAF50;
        }

        .lose-title {
            color: #f44336;
        }

        .result-stats {
            margin: 20px 0;
            font-size: 1.1rem;
            color: #555;
        }

        .play-again-btn {
            padding: 15px 40px;
            font-size: 1.1rem;
            border-radius: 25px;
            cursor: pointer;
            border: none;
            color: white;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
            transition: transform 0.2s;
        }

        .play-again-btn:hover {
            transform: scale(1.05);
        }

        .win-btn {
            background-color: #4CAF50;
        }

        .lose-btn {
            background-color: #f44336;
        }

        /* Ads Screen */
        .ads-screen {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.9);
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            z-index: 300;
        }

        .ads-content {
            background-color: white;
            padding: 20px;
            border-radius: 10px;
            text-align: center;
            max-width: 90%;
            width: 350px;
        }

        .ads-title {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: #333;
        }

        .ad-placeholder {
            width: 100%;
            height: 250px;
            background-color: #f0f0f0;
            display: flex;
            justify-content: center;
            align-items: center;
            margin: 15px 0;
            border-radius: 5px;
            overflow: hidden;
        }

        .ad-close-btn {
            padding: 10px 20px;
            background-color: #2196F3;
            color: white;
            border: none;
            border-radius: 20px;
            cursor: pointer;
            margin-top: 15px;
            opacity: 0.5;
            pointer-events: none;
        }

        .ad-close-btn.active {
            opacity: 1;
            pointer-events: all;
        }

        .countdown {
            margin-top: 10px;
            color: #9b9b9b;
        }

        /* Sound Toggle Button */
        .sound-toggle {
            position: fixed;
            bottom: 20px;
            right: 20px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: #4CAF50;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
            z-index: 10;
        }

        .sound-toggle img {
            width: 60%;
            height: 60%;
            filter: brightness(0) invert(1);
        }

        .sound-toggle.off {
            background-color: #f44336;
        }

        /* Responsive Adjustments */
        @media (max-width: 500px) {
            .game-title {
                font-size: 2rem;
            }

            .play-btn {
                padding: 12px 30px;
                font-size: 1rem;
            }

            .controls {
                flex-direction: column;
                gap: 10px;
            }

            .btn {
                width: 100%;
            }

            .result-content {
                padding: 20px;
                width: 90%;
            }

            .result-title {
                font-size: 1.8rem;
            }
        }