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

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f0f0;
    font-family: Arial, sans-serif;
}

.game-container {
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.game-header {
    text-align: center;
    margin-bottom: 20px;
}

h1 {
    color: #333;
    margin-bottom: 10px;
}

.score {
    font-size: 1.2em;
    color: #666;
}

#gameCanvas {
    border: 2px solid #333;
    background-color: #fff;
}

.controls {
    margin-top: 20px;
    text-align: center;
}

#startBtn {
    padding: 10px 20px;
    font-size: 1.1em;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-bottom: 20px;
}

#startBtn:hover {
    background-color: #45a049;
}

.mobile-controls {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.horizontal-controls {
    display: flex;
    gap: 20px;
}

.mobile-controls button {
    width: 60px;
    height: 60px;
    font-size: 1.5em;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.mobile-controls button:hover {
    background-color: #45a049;
}

@media (max-width: 768px) {
    .mobile-controls {
        display: flex;
    }
}