webwork.css

table.attemptResults {
    margin-left: 2em;
    background: #efefef;
    padding: 0.2em;
}
table.attemptResults + .attemptResultsSummary {
    margin-top: 1em;
}

.problem-main-form {
    margin-top: 1em;
    background: #eeeeff;
    padding: 0.5em;
}
td.ResultsWithoutError {
    background: #9f9;
}
td.ResultsWithError {
    background: #f99;
}

tr th {
    text-align: center;
    padding: 0.2em 1em 0.2em 1em;
}
tr td {
    text-align: center;
}
tr td:empty {
    background: #fff;
}

/*
table td { border-left: 1px solid #000; }
table td:first-child { border-left: none; }
*/

ol, ul {
    margin-top: 0.75em !important;
}

.problem {
    padding: 1em;
    border: 0.5px solid #aaa;
    background: #fdfdfd;
}

.problem a {
    text-decoration: none;
}

.knowl {
    margin-left: 1em;
    padding: 0.2em;
    background: #efe;
}

/*
.problem a.internal::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 1px;
    right: 2.4px;
    left: 2.4px;
    border-bottom: 1px dotted #9c2310;
    transition-property: left, right;
    transition-duration: 0ms;
    z-index: 0;
}
*/