body {
    background: #444;
}

* {
    color: white;
    padding: 4px;
    margin: 2px;
    font-family: Arial, Verdana;
}

canvas {
    padding: 0;
}

button {
    color: #fff;
    background: #222;
    border: solid thin #fff;
    transition: background .2s;
}

button:hover {
    background: #555;
}

input {
    color: #fff;
    background: #333;
    border: solid thin #fff;
    height: 28px;
    vertical-align: middle;
}

#input-pen-color {
    height: 38px;
}

#button-clear-canvas {
    color: #faa;
}

#button-download-image {
    color: #afa;
}