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

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f8ff;
    font-family: 'Arial', sans-serif;
}

.game-container {
    position: relative;
    width: 800px;
    height: 300px;
    border: 2px solid #333;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.score-container {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 20px;
    font-weight: bold;
    color: #333;
    z-index: 10;
    background: rgba(255, 255, 255, 0.7);
    padding: 5px 10px;
    border-radius: 5px;
}

#game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
    z-index: 20;
}

#restart-button {
    margin-top: 15px;
    padding: 8px 16px;
    font-size: 16px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#restart-button:hover {
    background-color: #45a049;
}

.hidden {
    display: none;
}

canvas {
    background-color: #ffffff;
}