body {
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background-color: #000000;
    font-family: monospace;
    color: #ff0000;
}

#gameCanvas {
    border: 2px solid #ff0000;
    background-color: #000000;
}

#score {
    font-size: 24px;
    margin: 20px 0;
    font-weight: bold;
    color: #ff0000;
}

.controls {
    margin-top: 20px;
    text-align: center;
    font-size: 16px;
    line-height: 1.5;
    color: #ff0000;
}

#restartButton {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 15px 30px;
    font-size: 20px;
    background-color: #ff0000;
    color: #000000;
    border: none;
    cursor: pointer;
    font-family: monospace;
    font-weight: bold;
    transition: background-color 0.2s;
}

#restartButton:hover {
    background-color: #cc0000;
}