
body {
    background-color: white;
    color: black;
}

.stdout, .stderr {
    border: solid #CCCCCC 1px;
    margin: 0.5em;
    padding: 0.2em;
}

.stderr {
    color: red;
}

.summary, .result {
    color: blue;
    border: solid #CCCCCC 1px;
    margin: 0.2em;
    padding: 0.2em;
}

Add a simple CSS file
Add a simple CSS file