body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center; 
    height: 100vh;
    background: linear-gradient(45deg, #000, #454545);
    font-family: 'Arial', sans-serif;
}

#gameContainer {
    position: relative;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 0px;
    overflow: hidden;
    padding: 0px;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.3); 
}

#gameCanvas {
    border: none;
    display: block;
    margin: 0 auto; 
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.5); 
}

#scoreContainer {
    position: absolute;
    top: 20px;
    left: 25px;
    width: calc(100% - 40px); 
    display: flex;
    justify-content: space-between;
    color: #fff;
    font-size: 16px; 
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

#score, #speed {
    display: inline-block;
    padding: 5px 10px; 
    background-color: rgba(0, 0, 0, 0.0);
    border-radius: 0px; 
    box-shadow: 0 0 0px rgba(255, 255, 255, 0.3);
}

#startButton {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 15px 30px;
    font-size: 20px;
    color: #fff;
    background-color: #007BFF;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

#startButton:hover {
    opacity: 1;
}