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

        body {
            font-family: 'Courier New', monospace;
            background: linear-gradient(135deg, #1e3c72, #2a5298);
            color: white;
            overflow: hidden;
            height: 100vh;
        }

        .game-container {
            position: relative;
            width: 100%;
            height: 100vh;
            background: linear-gradient(to bottom, #87CEEB 0%, #87CEEB 70%, #228B22 70%, #228B22 100%);
        }

        .ground {
            position: absolute;
            bottom: 0;
            width: 100%;
            height: 80px;
            background: #8B4513;
            border-top: 4px solid #654321;
        }

        .player {
            position: absolute;
            bottom: 80px;
            left: 100px;
            width: 40px;
            height: 60px;
            background: #FF6B6B;
            border-radius: 20px 20px 40px 40px;
            transition: bottom 0.4s ease-out;
            z-index: 10;
        }

        .player::before {
            content: '';
            position: absolute;
            top: 10px;
            left: 10px;
            width: 20px;
            height: 20px;
            background: #FFE5B4;
            border-radius: 50%;
        }

        .player::after {
            content: '{}';
            position: absolute;
            top: 35px;
            left: 12px;
            font-size: 16px;
            color: white;
            font-weight: bold;
        }

        .obstacle {
            position: absolute;
            bottom: 80px;
            width: 30px;
            height: 50px;
            background: #8B0000;
            border-radius: 5px;
            animation: moveLeft 8s linear infinite;
        }

        .obstacle::before {
            content: '';
            position: absolute;
            top: -10px;
            left: 5px;
            width: 20px;
            height: 20px;
            background: #228B22;
            border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
        }

        @keyframes moveLeft {
            from { right: -50px; }
            to { right: 100%; }
        }

        .command-input {
            position: absolute;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            background: rgba(0, 0, 0, 0.8);
            padding: 20px;
            border-radius: 10px;
            border: 2px solid #4CAF50;
        }

        .input-field {
            width: 400px;
            padding: 10px;
            font-family: 'Courier New', monospace;
            font-size: 16px;
            background: #1a1a1a;
            color: #00ff00;
            border: 1px solid #333;
            border-radius: 5px;
            outline: none;
        }

        .input-field:focus {
            border-color: #4CAF50;
            box-shadow: 0 0 10px rgba(76, 175, 80, 0.3);
        }

        .hint {
            margin-top: 10px;
            font-size: 14px;
            color: #4CAF50;
            text-align: center;
            transition: opacity 0.3s ease, color 0.3s ease;
            font-weight: bold;
        }

        .hint.danger {
            color: #ff4444;
            animation: urgentPulse 0.5s ease-in-out infinite alternate;
        }

        .hint.hidden {
            opacity: 0;
        }

        @keyframes urgentPulse {
            from { 
                color: #ff4444;
                text-shadow: 0 0 5px #ff4444;
            }
            to { 
                color: #ff8888;
                text-shadow: 0 0 15px #ff4444;
            }
        }

        .score {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 24px;
            font-weight: bold;
            color: white;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }

        .level {
            position: absolute;
            top: 20px;
            left: 20px;
            font-size: 20px;
            color: white;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }

        .game-over {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: rgba(0, 0, 0, 0.95);
            padding: 30px;
            border-radius: 15px;
            text-align: center;
            display: none;
            z-index: 100;
            min-width: 400px;
            border: 2px solid #4CAF50;
        }

        .initials-input {
            margin: 15px 0;
            padding: 10px;
            font-size: 18px;
            text-align: center;
            background: #1a1a1a;
            color: #00ff00;
            border: 2px solid #4CAF50;
            border-radius: 5px;
            width: 100px;
            text-transform: uppercase;
            font-family: 'Courier New', monospace;
        }

        .restart-btn {
            margin: 10px;
            padding: 12px 24px;
            background: #4CAF50;
            color: white;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-size: 16px;
            font-family: 'Courier New', monospace;
            transition: background 0.3s ease;
        }

        .restart-btn:hover {
            background: #45a049;
        }

        .restart-btn:disabled {
            background: #666;
            cursor: not-allowed;
        }

        .high-scores {
            position: absolute;
            top: 20px;
            right: 20px;
            background: rgba(0, 0, 0, 0.8);
            padding: 15px;
            border-radius: 10px;
            border: 1px solid #4CAF50;
            min-width: 200px;
        }

        .high-scores h3 {
            color: #4CAF50;
            margin-bottom: 10px;
            font-size: 16px;
            text-align: center;
        }

        .score-entry {
            display: flex;
            justify-content: space-between;
            margin: 5px 0;
            font-size: 14px;
            color: #ccc;
        }

        .score-entry.new-score {
            color: #FFD700;
            font-weight: bold;
            animation: glow 1s ease-in-out infinite alternate;
        }

        @keyframes glow {
            from { text-shadow: 0 0 5px #FFD700; }
            to { text-shadow: 0 0 20px #FFD700; }
        }

        .current-game {
            position: absolute;
            top: 60px;
            left: 20px;
            font-size: 16px;
            color: white;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }

        .jumping {
            bottom: 200px !important;
        }

        .clouds {
            position: absolute;
            top: 10%;
            width: 100%;
            height: 200px;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 20"><circle cx="20" cy="10" r="8" fill="white" opacity="0.7"/><circle cx="30" cy="8" r="6" fill="white" opacity="0.7"/><circle cx="40" cy="12" r="7" fill="white" opacity="0.7"/></svg>') repeat-x;
            animation: moveClouds 20s linear infinite;
        }

        @keyframes moveClouds {
            from { transform: translateX(0); }
            to { transform: translateX(-100px); }
        }

        .correct-feedback {
            position: absolute;
            top: 30%;
            left: 50%;
            transform: translateX(-50%);
            color: #4CAF50;
            font-size: 20px;
            font-weight: bold;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .wrong-feedback {
            position: absolute;
            top: 30%;
            left: 50%;
            transform: translateX(-50%);
            color: #f44336;
            font-size: 18px;
            font-weight: bold;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .level-up {
            position: absolute;
            top: 20%;
            left: 50%;
            transform: translateX(-50%);
            background: rgba(76, 175, 80, 0.9);
            color: white;
            padding: 20px;
            border-radius: 10px;
            font-size: 24px;
            font-weight: bold;
            text-align: center;
            opacity: 0;
            transition: opacity 0.3s ease;
            z-index: 50;
        }