*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: 0;
}


html {
    font-size: 62.5%;
}


canvas {
    display: block;
}


#instructions {
    padding: 20px;
    border: 2px solid #111;
    position: absolute;
    right: 1rem;
    bottom: 1rem;
    font: normal 1.3rem "Tahoma", sans-serif;
    color: #fff;
    background: #666;
    border-radius: 10px;
}