body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #2c3e50;
    font-family: 'Press Start 2P', cursive;
}

.game-container {
    background-color: #34495e;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
    text-align: center;
}

h1 {
    color: #ecf0f1;
    margin-bottom: 20px;
    font-size: 24px;
}

.game-info {
    margin-bottom: 20px;
    color: #ecf0f1;
}

#gameCanvas {
    background-color: #2c3e50;
    border: 4px solid #95a5a6;
}

#startBtn {
    background-color: #27ae60;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    margin: 0 10px;
    font-family: inherit;
}

#startBtn:hover {
    background-color: #219a52;
}

.game-controls {
    margin-top: 20px;
    color: #bdc3c7;
    font-size: 14px;
}

.game-info span {
    margin: 0 10px;
}

#pauseBtn {
    background-color: #e67e22;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    margin: 0 10px;
    font-family: inherit;
}

#pauseBtn:hover {
    background-color: #d35400;
}

.game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.9);
    padding: 30px;
    border-radius: 15px;
    color: white;
    text-align: center;
    display: none;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    border: 2px solid #3498db;
}

.game-over h2 {
    color: #3498db;
    margin-top: 0;
    font-size: 28px;
}

.game-over p {
    font-size: 18px;
    margin: 10px 0;
}

.restart-btn {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    margin-top: 15px;
    transition: background-color 0.3s;
}

.restart-btn:hover {
    background-color: #2980b9;
}

/* 添加游戏暂停时的视觉提示 */
.game-container.paused #gameCanvas {
    opacity: 0.7;
}