styles.css

/* Question and results page */

.que.coderunner div.coderunner-examples,
.que.coderunner div.coderunner-test-results {
    width: 100%;
    overflow-x: auto;
    box-sizing: border-box;
}

#page-question-type-coderunner table.coderunner-test-results td,
#page-question-type-coderunner table.coderunner-test-results th,
.que.coderunner table.coderunner-test-results td,
.que.coderunner table.coderunnerexamples td,
.que.coderunner textarea.edit_code {
    font-family: courier, monospace;
    vertical-align: top;
}

.que.coderunner textarea.edit_code {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.que.coderunner div.initialisationerror {
    color: #ca3120;
}

.que.coderunner div.coderunnerexamples {
    padding-bottom: 10px;
}

#page-question-type-coderunner div.ui_wrapper,
.que.coderunner div.ui_wrapper {
    max-width: 100%;
    box-sizing: border-box;
    background-color: #f0f0f0;
}

.que.coderunner .ace_editor,
body#page-question-type-coderunner .ace_editor {
    font-size: 100%;
    line-height: 18px;
}

.que.coderunner p.for-example-para {
    font-weight: bold;
}

.que.coderunner .btn {
    margin-right: 10px;
}

.que.coderunner div.coderunner-test-results {
    padding: 0.5em;
}

.que.coderunner label.answerprompt {
    font-weight: bold;
}

.que.coderunner div.prompt {
    margin-top: 20px;
    margin-bottom: 7px;
}

.que.coderunner div.coderunner-lang-select-div {
    padding-top: 10px;
    padding-bottom: 3px;
}

.que.coderunner select.coderunner-lang-select {
    margin: 0 0 0 10px;
    padding: 1px 5px 1px 5px;
}

.que.coderunner input.answer_reset_btn {
    margin-bottom: 5px;
}

#page-question-type-coderunner table.coderunner-test-results td,
#page-question-type-coderunner table.coderunner-test-results th,
.que.coderunner table.coderunner-test-results td,
.que.coderunner table.coderunner-test-results th,
.que.coderunner table.coderunnerexamples td,
.que.coderunner table.coderunnerexamples th {
    border: 1px solid #b0b0b0;
    padding: 0.4em;
}

#page-question-type-coderunner table.coderunner-test-results .header,
.que.coderunner table.coderunner-test-results .header,
.que.coderunner table.coderunnerexamples .header {
    text-align: left;
    background-color: #f8f8ff;
}

.que.coderunner table.coderunner-test-results tr.hidden-test {
    opacity: 0.5;
}

#page-question-type-coderunner table.coderunner-test-results {
    margin-top: 0.5em;
    margin-bottom: 0;
}

.que.coderunner table.coderunner-test-results,
.que.coderunner table.coderunnerexamples {
    margin-bottom: 1em;
}

#page-question-type-coderunner div.coderunner-test-results td:last-child,
#page-question-type-coderunner div.coderunner-test-results td:first-child
.que.coderunner div.coderunner-test-results td:last-child,
.que.coderunner div.coderunner-test-results td:first-child {
    min-width: 16px;
}

.que.coderunner textarea.coderunner-answer[cols] {
    max-width: 100%;
    width: auto;
    line-height: 18px;
}

.que.coderunner div.coderunner-test-results {
    color: black;
}

.que.coderunner div.precheck h3 {
    margin: 3px 0;
    font-size: 24px;
    color: #333;
}

.que.coderunner pre.tablecell {
    background-color: inherit;
    border: none;
    padding: 0;
    white-space: pre;
}

.que.coderunner div.coderunner-test-results pre,
.que.coderunner div.coderunner-examples pre {
    margin-bottom: 0;
}

.que.coderunner div.coderunner-test-results.good,
#page-question-type-coderunner tr.coderunner-failed-test.fixed {
    background-color: #afa;
}

.que.coderunner div.coderunner-test-results.outputonly {
    background-color: #f0f0f0;
}

.que.coderunner div.coderunner-test-results.good.precheck {
    background: repeating-linear-gradient(0deg, #fff, #fff 8px, #f8f1f9 8px, #f8f1f9 16px);
}

.que.coderunner div.coderunner-test-results.bad,
.que.coderunner div.pre_syntax_error,
.que.coderunner div.pre_question_error {
    background-color: #faa;
}

.que.coderunner div.coderunner-test-results.bad.precheck,
.que.coderunner pre.pre_syntax_error .precheck {
    background: repeating-linear-gradient(0deg, #fdd, #fdd 8px, #fee 8px, #fee 16px);
}

.que.coderunner pre.pre_syntax_error,
.que.coderunner div.pre_question_error {
    border: none;
}

div.coderunner-test-results.partial {
    background-color: #fff3bf;
}

.que.coderunner span.answerprompt {
    font-weight: bold;
}

.que.coderunner span.penaltyregime {
    padding-left: 0.6em;
}

/* Ins and del elements are used to show differences. ins elements are
   always hidden and del elements are always displayed (without decoration),
   but the background colour of del elements is toggled by the
   Show/Hide differences button.
*/
.que.coderunner div.coderunner-test-results del {
    text-decoration: none;
    background-color: #e0e000;
}

/* Add lines I seem to have somehow overridden in styles.php */
.que.coderunner tr.r0 td {
    background-color: #f5f5f5;
}

.que.coderunner tr.r1 td {
    background-color: #e5e5e5;
}

.que.coderunner div.im-controls p.penaltyregime {
    display: inline;
    float: right;
}

.que.coderunner .ace_wrapper {
    border: 1px solid #d9edf7;
}

.que.coderunner .ace_gutter-cell {
    border-right: solid 1px #000;
}

.que.coderunner .ace_fold-widget {
    background-color: transparent;
    background-image: none;
    border: none;
}

.que.coderunner .ace_fold-widget:hover {
    border: 1px solid gray;
    margin-top: 1px;
}

/* expand */
.que.coderunner .ace_fold-widget.ace_closed::before {
    content: '►';
    color: gray;
    font-size: 80%;
    margin: 0 2px;
    margin-top: -4px;
}

/* collapse */
.que.coderunner .ace_fold-widget.ace_open::before {
    content: '▼';
    color: gray;
    font-size: 60%;
    margin: 0 2px;
}

.que.coderunner .ace_line .ace_fold {
    padding-right: 1px;
    line-height: 9px;
}

.que.coderunner .ace_line .ace_fold::before {
    background-image: none;
    content: '←→';
    float: right;
    margin-top: -1px;
}

/* Editing form. */
body#page-question-type-coderunner div.edit_code textarea {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    font-family: courier, monospace;
}

body#page-question-type-coderunner pre.templateparamserror {
    color: #ca3120;
}

body#page-question-type-coderunner div#id_qtype_coderunner_error_div:empty {
    display: none;
}

body#page-question-type-coderunner div#id_qtype_coderunner_error_div {
    font-size: 120%;
    font-weight: bold;
    color: red;
    border: 2px solid red;
    padding: 4px;
}

body#page-question-type-coderunner textarea#id_templateparams {
    resize: both;
}

body#page-question-type-coderunner .uiparamtablediv {
    padding-top: 8px;
}

body#page-question-type-coderunner table.uiparamtable,
body#page-question-type-coderunner table.uiparamtable th,
body#page-question-type-coderunner table.uiparamtable td {
    border: 1px solid #ccc;
    padding: 4px;
    background-color: #f8f8f8;
}

body#page-question-type-coderunner button.toggleuidetails {
    border: none;
    color: blue;
}

body#page-question-type-coderunner .ace_wrapper {
    border: 1px solid #bbb;
}

body#page-question-type-coderunner div[id^=fitem_id_],
body#page-question-type-coderunner div[id^=fgroup_id_] {
    background: #eee;
    margin-bottom: 0;
    margin-top: 0;
    padding-bottom: 5px;
    padding-top: 5px;
    border: 1px solid #bbb;
    border-top: 0;
    border-bottom: 0;
    overflow: visible;
}

body#page-question-type-coderunner label[for^=id_useasexample],
body#page-question-type-coderunner label[for^=id_hiderestiffail],
body#page-question-type-coderunner label.form-check {
    padding: 5px;
    border: 1px solid lightgray;
}

body#page-question-type-coderunner p.question-type-details-header {
    font-size: 130%;
}

body#page-question-type-coderunner div[id^=fgroup_id_][id*=show_columns]
.felement span {
    margin-right: 2em;
}

body#page-question-type-coderunner div[id^=fgroup_id_][id*=show_columns] {
    padding-top: 16px;
    padding-bottom: 16px;
}

body#page-question-type-coderunner select#id_coderunner_type {
    margin-right: 2em;
}

body#page-question-type-coderunner div[id^=fitem_id_testcode]:not(:first-of-type) {
    margin-top: 14px;
    border: 1px solid #bbb;
    border-bottom: 0;
    padding-top: 8px;
}

body#page-question-type-coderunner div[id=fitem_id_addanswers] {
    margin-top: 14px;
    border: 1px solid #bbb;
    padding-top: 8px;
}

body#page-question-type-coderunner input[name="usecurrentcat"] {
    margin-right: 1px;
    margin-left: 2em;
}

body#page-question-type-coderunner input[type="checkbox"] + label {
    margin-right: 1em;
}

body#page-question-type-coderunner textarea.edit_code {
    width: 100%;
    box-sizing: border-box;
    font-family: courier, monospace;
}

body#page-question-type-coderunner textarea.uiloadfailed {
    border: 6px solid orange;
}

body#page-question-type-coderunner div.uiloadfailed {
    background-color: orange;
    padding-left: 10px;
}

body#page-question-type-coderunner input.testcasemark,
body#page-question-type-coderunner input.coderunner_answerbox_size,
body#page-question-type-coderunner input#id_cputimelimitsecs,
body#page-question-type-coderunner input#id_memlimitmb {
    width: auto;
}

body#page-question-type-coderunner label + select,
body#page-question-type-coderunner label + input {
    margin-right: 1em;
}

body#page-question-type-coderunner div.testcaseexpression {
    padding-top: 10px;
    border-top: 1px solid lightgrey;
}

/* Bulk tester */
li.bulktest.coderunner.context.quiz {
    padding-left: 1.5em;
    list-style-type: none;
}

/* Ace gapfiller ui */
.ace-gap-background {
    position: absolute;
    background-color: SeaShell;
    border-radius: 0;
}

.ace-gap-outline {
    position: absolute;
    outline: 1px solid;
    outline-color: rgba(0, 0, 0, 0.5);
}