body {
    background: #222;
    color: #e0e0e0;
    font-family: 'Courier New', Courier, monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}
.container {
    background: #111;
    border: 6px solid #7ec850;
    border-radius: 16px;
    box-shadow: 0 0 32px #000a;
    padding: 32px 32px 24px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
h1 {
    font-size: 2.2rem;
    margin-bottom: 16px;
    color: #7ec850;
    letter-spacing: 2px;
    text-shadow: 0 2px 8px #000a;
}
canvas {
    background: #222;
    border: 4px solid #7ec850;
    border-radius: 8px;
    margin-bottom: 16px;
    box-shadow: 0 0 16px #000a;
}
.score {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: #fff;
}
#restartBtn {
    background: #7ec850;
    color: #111;
    border: none;
    border-radius: 6px;
    padding: 8px 24px;
    font-size: 1rem;
    font-family: inherit;
    cursor: pointer;
    margin-bottom: 10px;
    transition: background 0.2s;
}
#restartBtn:hover {
    background: #a6e97a;
}
.instructions {
    font-size: 0.95rem;
    color: #aaa;
    margin-top: 8px;
    text-align: center;
}