body {
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    font-family: 'Arial', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.game-container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    text-align: center;
    max-width: 600px;
    width: 90%;
}

.game-title {
    color: #333;
    margin-bottom: 20px;
    font-size: 2rem;
    font-weight: bold;
}

.game-subtitle {
    color: #666;
    margin-bottom: 30px;
    font-size: 1rem;
}

#gameCanvas {
    border: 3px solid #333;
    border-radius: 10px;
    background: #f0f8ff;
    display: block;
    margin: 0 auto 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.game-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    font-size: 1.2rem;
    font-weight: bold;
}

.score, .lives {
    color: #333;
}

.controls {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    display: none;
}

.restart-btn {
    background: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    margin-top: 15px;
}

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

.ai-badge {
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    display: inline-block;
    margin-bottom: 10px;
}

.back-link-container {
    margin-top: 20px;
    text-align: center;
}

.back-link {
    display: inline-block;
    padding: 10px 20px;
    background: #667eea;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.back-link:hover {
    background: #5a6fd8;
    color: white;
    text-decoration: none;
}