body {
    background: #222;
    color: #fff;
    font-family: 'Segoe UI', Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 100vh;
    margin: 0;
}

h1 {
    margin-top: 30px;
    margin-bottom: 10px;
    font-size: 2.2em;
    letter-spacing: 2px;
}

#score {
    font-size: 1.3em;
    margin-bottom: 10px;
}

canvas#tetris {
    background: #111;
    border: 3px solid #fff;
    box-shadow: 0 0 20px #000a;
    display: block;
    margin-bottom: 20px;
}

.controls {
    background: #333a;
    padding: 12px 20px;
    border-radius: 8px;
    margin-bottom: 30px;
}

.controls ul {
    margin: 0;
    padding-left: 20px;
}

.controls li {
    margin-bottom: 4px;
}