body {
    background: black;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    height: 100vh;
    margin: 0;
}

canvas {
    border: 2px solid #00ff00;
    background: #000;
}

#score {
    margin-bottom: 10px;
    color: #00ff00;
    font-family: monospace;
    font-size: 20px;
}

/* Controls */
.controls {
    margin-top: 15px;
    text-align: center;
}

button {
    background: #111;
    color: #00ff00;
    border: 2px solid #00ff00;
    font-size: 24px;
    padding: 10px 20px;
    margin: 5px;
    border-radius: 8px;
    cursor: pointer;
    font-family: monospace;
    transition: 0.2s;
}

button:hover {
    background: #00ff00;
    color: black;
}

/* Retry button */
#retry {
    margin-top: 20px;
    font-size: 20px;
}

.hidden {
    display: none;
}