example.css

:root {
  --jsf-main-bg-color: white;
  --jsf-modest-bg-color: #dddddd;
  --jsf-border-color: lightgray;
  --jsf-modest-bg-highlight-color: silver;
  --jsf-validation-color: red;
  --jsf-main-fg-color: black;
  --jsf-description-color: #939393;
  background-color: var(--jsf-main-bg-color);
  color: var(--jsf-main-fg-color);
}

body {
  margin: 0;
  padding: 1em;
  width: 100vw;
  height: 100vh;
}

/* Common */

[hidden] {
  display: none;
}

/* Controls */

input {
  height: 1.25em;
}

.jsf-label {
  margin: 0.5em 1em;
  font-weight: bold;
  border-bottom: 1px solid var(--jsf-border-color);
}

.control {
  display: flex;
  flex: 1;
  flex-direction: column;
  margin: 0.25em 1em;
}

.control.trim {
  display: inline-flex;
}

.control.trim>*:first-child {
  margin-right: 0;
}

.control>* {
  margin-left: 0.25em;
}

.control>*:first-child {
  margin-left: 0;
  margin-right: -0.25em;
}

.control>label {
  font-weight: bold;
  color: var(--jsf-main-fg-color);
}

.control>.validation:empty {
  margin-left: 0;
}

.control>.input-description, .control>.validation {
  font-size: 0.75rem;
  text-align: left;
  margin-top: 0.5em;
  min-height: 1em;
  font-family: "Roboto", "Helvetica", "Arial", sans-serif;
  line-height: 1em;
}

.control>.validation {
  color: var(--jsf-validation-color);
}

.control>.input-description {
  color: var(--jsf-description-color);
}

.control>.input {
  border-style: solid;
  border-width: thin;
  border-radius: 0.2em;
  border-color: var(--jsf-border-color);
  padding: 0.2em;
  color: var(--jsf-main-fg-color);
}

.control>input.input {
  background-color: transparent;
}

.control.validation_error>.input {
  border-color: var(--jsf-validation-color);
}

.control[hidden] {
  display: none;
}

/* Layouts */

.vertical-layout {
  display: flex;
  flex-direction: column;
}

.vertical-layout[hidden] {
  display: none;
}

.vertical-layout>* {
  flex: 1;
}

.horizontal-layout {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
}

.horizontal-layout[hidden] {
  display: none;
}

.horizontal-layout>* {
  flex: 1;
}

.group-layout {
  display: flex;
  flex-direction: column;
  border-style: solid;
  border-color: var(--jsf-border-color);
  border-width: thin;
  border-radius: 0.2em;
}

.group-layout[hidden] {
  display: none;
}

.group-layout>legend {
  padding: 0 0.5em;
  font-weight: bold;
  color: var(--jsf-main-fg-color);
}

.categorization {
  display: flex;
  flex-direction: row;
}

.categorization[hidden] {
  display: none;
}

.categorization>* {
  border-style: solid;
  border-width: thin;
  border-color: var(--jsf-border-color);
  border-radius: 0.2em;
}

.categorization>*:first-child {
  margin-right: 0.25em;
}

.categorization>.categorization-master {
  flex: 1;
}

.categorization>.categorization-master ul {
  list-style-type: none;
  font-weight: normal;
}

.categorization>.categorization-master ul>li>span {
  cursor: pointer;
  display: block;
  color: var(--jsf-main-fg-color);
}

.categorization>.categorization-master ul>li>span:hover {
  font-weight: bold;
}

.categorization>.categorization-master ul>li.category-group>ul {
  padding-left: 0.5em;
}

.categorization>.categorization-master ul>li.category-group>span {
  cursor: default;
}

.categorization>.categorization-master ul>li.category-group>span:hover {
  font-weight: normal;
}

.categorization>.categorization-master ul>li.selected>span {
  font-weight: bold;
}

.categorization>.categorization-detail {
  flex: 3;
}

.jsf-treeMasterDetail {
  display: flex;
  flex-direction: column;
}

.jsf-treeMasterDetail>.jsf-treeMasterDetail-content {
  display: flex;
  flex-direction: row;
}

.jsf-treeMasterDetail>.jsf-treeMasterDetail-content>* {
  border-style: solid;
  border-width: thin;
  border-color: var(--jsf-border-color);
  border-radius: 0.2em;
}

.jsf-treeMasterDetail>.jsf-treeMasterDetail-content>*:first-child {
  margin-right: 0.25em;
}

.jsf-treeMasterDetail-master {
  flex: 1;
}

.jsf-treeMasterDetail-detail {
  flex: 3;
}

.jsf-treeMasterDetail-master ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  position: relative;
  overflow: hidden;
}

.jsf-treeMasterDetail-master li {
  min-height: 1em;
  position: relative;
  padding-left: 1.5em;
}

.jsf-treeMasterDetail-master li>div {
  display: flex;
  flex-direction: row;
}

.jsf-treeMasterDetail-master li>div>.icon {
  flex-basis: 1em;
  min-height: 1em;
  margin-right: 0.25em;
  background-repeat: no-repeat;
  background-position: center;
}

.jsf-treeMasterDetail-master li>div>.icon.folder {
  background-image: url('./icons/folder.png');
}

.jsf-treeMasterDetail-master li>div>.icon.page {
  background-image: url('./icons/page.png');
}

.jsf-treeMasterDetail-master li>div>.icon.drive {
  background-image: url('./icons/drive.png');
}

.jsf-treeMasterDetail-master li.selected>div>.label {
  font-weight: bold;
  background-color: lightgray
}

.jsf-treeMasterDetail-master li>div>.label {
  display: flex;
  flex: 1;
  margin-right: 1em;
  min-height: 1em;
  color: var(--jsf-main-fg-color);
}

/* TODO: Needed? */

.jsf-treeMasterDetail-master li>div>.label>span:first-child:empty {
  background: #ffff00;
  min-height: 1em;
}

.jsf-treeMasterDetail-master li>div>.label:hover {
  font-weight: bold;
  cursor: pointer;
  background-color: var(--jsf-modest-bg-color);
}

.jsf-treeMasterDetail-master li>div>.label>.add, .jsf-treeMasterDetail-master li>div>.label>.remove {
  display: none;
  cursor: pointer;
  margin-left: 0.25em;
  min-width: 1em;
  font-weight: normal;
}

.jsf-treeMasterDetail-master li>div>.label:hover>.add, .jsf-treeMasterDetail-master li>div>.label:hover>.remove {
  display: flex;
  justify-content: center;
}

.jsf-treeMasterDetail-master li>div>.label:hover>.add:hover, .jsf-treeMasterDetail-master li>div>.label:hover>.remove:hover {
  background-color: var(--jsf-modest-bg-highlight-color);
}

.jsf-treeMasterDetail-master li::before, .jsf-treeMasterDetail-master li::after, .jsf-treeMasterDetail-master ul::after {
  content: '';
  position: absolute;
  left: 0.2em;
}

.jsf-treeMasterDetail-master li::before {
  border-top: 1px solid var(--jsf-border-color);
  top: 0.5em;
  width: 1em;
}

.jsf-treeMasterDetail-master li::after {
  border-left: 1px solid var(--jsf-border-color);
  height: 100%;
  top: -0.6em;
}

.jsf-treeMasterDetail-master ul::after {
  border-left: 1px solid var(--jsf-border-color);
  height: 0.6em;
  bottom: 0;
}

.jsf-treeMasterDetail-master ul:last-child::after {
  display: none;
}

.jsf-treeMasterDetail-master>ul>li::after {
  top: 0.5em;
}

.jsf-treeMasterDetail-master>ul>li:last-child::after {
  display: none;
}

.jsf-treeMasterDetail-master>ul>li:only-child::before {
  display: none;
}

.jsf-treeMasterDetail-master>ul>li:only-child {
  padding-left: 0.25em;
}

jsonforms-tree>dialog>.content {
  display: flex;
  flex-direction: column;
}

.array-layout {
  display: flex;
  flex: 1;
  flex-direction: column;
  border-style: solid;
  border-color: var(--jsf-border-color);
  border-width: thin;
  border-radius: 0.2em;
}

.array-layout[hidden] {
  display: none;
}

.array-layout>legend {
  padding: 0 0.5em;
  font-weight: bold;
}

.array-layout>legend>label {
  margin-right: 1em;
  color: var(--jsf-main-fg-color);
}

.array-layout>.children>* {
  border-bottom: 1px solid var(--jsf-border-color);
  display: block;
}

.array-layout>.children>*:last-child {
  border-bottom: none;
}

.array-table-layout.control>header, .array-control-layout.control>header {
  display: flex;
  margin: 0.25em;
}

.array-table-layout header label, .array-control-layout header label {
  flex: 1;
  font-weight: bold;
}

.array-control-layout.control>.children .child-controls {
  display: flex;
  justify-content: flex-end;
  margin: 0 1em 0.75em 0;
}

.array-table-layout table {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.array-table-layout table.control>* {
  margin: 0;
}

.array-table-layout tr {
  display: flex;
}

.array-table-layout table, .array-table-layout th, .array-table-layout td {
  border: 1px solid var(--jsf-border-color);
  border-collapse: collapse;
}

.array-table-layout th {
  padding: 5px;
  flex: 1
}

.array-table-layout td {
  display: flex;
  flex: 1;
}

.array-table-layout td>* {
  flex: 1;
}
.array-control-layout .children>div {
	border-top: 1px solid var(--jsf-border-color);
	padding-top: 10px;
}