* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #111;
}

canvas {
    display: block;
    width: 100%;
    height: calc(100% - 24px);
}

#guideLink {
    display: block;
    height: 24px;
    line-height: 24px;
    text-align: center;
    background: #0a0a0a;
    color: #4FC3F7;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    text-decoration: none;
}

#guideLink:hover {
    color: #fff;
    text-decoration: underline;
}