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

        body {
            font-family: 'Arial Black', sans-serif;
            overflow: hidden;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            background: linear-gradient(180deg, #4ec0ca 0%, #87ceeb 50%, #e0f6ff 100%);
        }

        #gameContainer {
            position: relative;
            max-width: 800px;
            width: 100%;
            height: 600px;
            box-shadow: 0 10px 50px rgba(0,0,0,0.3);
        }

        #gameCanvas {
            display: block;
            width: 100%;
            height: 100%;
            background: linear-gradient(180deg, #4ec0ca 0%, #87ceeb 60%, #ded895 100%);
            cursor: pointer;
        }

        #score {
            position: absolute;
            top: 30px;
            left: 50%;
            transform: translateX(-50%);
            font-size: 64px;
            color: white;
            text-shadow: 4px 4px 0 #000, -2px -2px 0 #000, 2px -2px 0 #000, -2px 2px 0 #000;
            z-index: 10;
            font-weight: bold;
        }

        #highScore {
            position: absolute;
            top: 100px;
            left: 50%;
            transform: translateX(-50%);
            font-size: 24px;
            color: #ffd700;
            text-shadow: 2px 2px 0 #000, -1px -1px 0 #000, 1px -1px 0 #000, -1px 1px 0 #000;
            z-index: 10;
        }

        #startScreen, #gameOverScreen {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.8);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            z-index: 100;
        }

        #startScreen h1, #gameOverScreen h1 {
            font-size: 56px;
            color: #ffd700;
            text-shadow: 4px 4px 0 #000;
            margin-bottom: 20px;
            animation: bounce 1s infinite;
        }

        #startScreen p, #gameOverScreen p {
            font-size: 24px;
            color: white;
            text-shadow: 2px 2px 0 #000;
            margin: 10px 0;
            text-align: center;
            padding: 0 20px;
        }

        .difficulty {
            color: #ff4444;
            font-size: 28px;
            font-weight: bold;
            margin: 20px 0;
        }

        button {
            margin-top: 30px;
            padding: 20px 50px;
            font-size: 28px;
            font-weight: bold;
            background: linear-gradient(180deg, #4CAF50 0%, #45a049 100%);
            color: white;
            border: 4px solid #2d6b2f;
            border-radius: 15px;
            cursor: pointer;
            text-shadow: 2px 2px 0 #000;
            transition: all 0.2s;
            box-shadow: 0 6px 0 #2d6b2f;
        }

        button:hover {
            background: linear-gradient(180deg, #5bc95f 0%, #4CAF50 100%);
            transform: translateY(-2px);
            box-shadow: 0 8px 0 #2d6b2f;
        }

        button:active {
            transform: translateY(4px);
            box-shadow: 0 2px 0 #2d6b2f;
        }

        .warning {
            color: #ff3333;
            font-size: 20px;
            font-weight: bold;
            animation: pulse 0.5s infinite;
        }

        @keyframes bounce {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-20px); }
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.5; }
        }

        #instructions {
            position: absolute;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            font-size: 18px;
            color: white;
            text-shadow: 2px 2px 0 #000;
            text-align: center;
            z-index: 10;
        }

        @media (max-width: 768px) {
            #gameContainer {
                height: 100vh;
            }
            #score {
                font-size: 48px;
            }
            #startScreen h1, #gameOverScreen h1 {
                font-size: 40px;
            }
            button {
                font-size: 24px;
                padding: 15px 40px;
            }
        }