styles.css

/* Style for hint question block */
details.stack-hint {
    padding: 2px;
    display: block;
    border: 1px solid #ccc;
    background-color: #f2f2f2;
    width: fit-content;
}

div.stack-hint-content {
    padding: 10px;
}

/* Styles used when questions are being attempted. */
.que.stack .stackruntimeerrror {
    color: #c02200;
    font-size: 100%;
    font-weight: bold;
}
.que.stack .stacksyntaxexample {
    color: #1f536b;
    font-family: monospace;
    font-size: 100%;
    font-weight: bold;
}
.que.stack .stacksyntaxexamplehighlight {
    color: #f00;
}
.que.stack .stackinputfeedback.standard {
    border: 1px solid #fff;
    background-color: #fff;
    margin: 0.2em 3em 0.5em;
    padding: 0.5em 0.5em 0;
}
.que.stack .stackinputfeedback.equiv {
    vertical-align: top;
    display: inline-block;
    background-color: #fff;
    margin: 0;
    padding: 0.2em;
}
.que.stack .stackinputfeedback.compact {
    margin: 3px 3px 3px;
    display: inline-block;
    vertical-align: top;
    background-color: white;
    border: 1px solid #ccc;
    padding: 0.3em;
}
.stackinputfeedback .MathJax_Display {
    margin: 0.5em 0;
}
.que.stack .stackinputerror {
    padding: 0.2em 0.2em 0.2em;
    margin: 3px 3px 3px;
    display: block;
}
.que.stack .stackinputnotice {
    font-size: x-small;
    color: #888;
}
.que.stack .stackinputfeedback.empty {
    display: none;
}
.que.stack .stackinputfeedback.waiting,
.que.stack .stackinputfeedback.loading {
    color: #888;
    min-height: 1em;
}
.que.stack .stackinputfeedback.loading {