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

body {
    font-family: 'Arial', sans-serif;
    background-color: #f0f0f0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.game-container {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    padding: 20px;
    max-width: 500px;
    width: 100%;
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

h1 {
    color: #333;
    font-size: 24px;
}

.score-container {
    font-size: 18px;
    font-weight: bold;
    color: #4CAF50;
}

#gameCanvas {
    background-color: #222;
    border-radius: 5px;
    width: 100%;
    aspect-ratio: 1;
    display: block;
    margin: 0 auto;
}

.controls {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

#startButton {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

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

.mobile-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

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

.mobile-controls button {
    background-color: #2196F3;
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 5px;
    font-size: 20px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.mobile-controls button:hover {
    background-color: #0b7dda;
}

@media (min-width: 768px) {
    .mobile-controls {
        display: none;
    }
}