default.css

* {
  margin: 0;
  padding: 0;
}

html,
body {
  background-color: #e9e7de;
  color: #222;
  font-family: 'Saira Semi Condensed', sans-serif;
  font-size: 12pt;
}

h1 {
  font-size: 18pt;
}

a {
  color: #555;
  font-weight: bold;
  text-decoration: none;
}

a:visited {
  color: #666;
}

a:hover {
  text-decoration: underline;
}

#overlay {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0,0,0,0.5);
  z-index: 2;
}

input[type="radio"] {
  margin-right: 0.2em;
  cursor: pointer;
}

input[type="radio"] + label {
  margin-right: 1em;
  cursor: pointer;
}

#help-button {
  cursor: pointer;
  margin: 4px 4px 0 0;
  transition-property: transform;
  transition-duration: 0.1s;
  transition-timing-function: ease;
  transition-delay: 0s;
}

#help-button:hover {
  transform: scale(1.15);
}

.error {
  background-color: rgb(223, 53, 53) !important;
  font-weight: bold;
}

.hidden {
  display: none !important;
}

.show {
  display: block;
}

#loader-icon {
  display: inline-block;
  width: 17px;
  height: 17px;
  margin-right: 8px;
  vertical-align: middle;
}

.greyout {
  opacity: 0.5;
  background-color: rgba(0, 0, 0, 0.8) !important;
}

table {
  margin: 12pt 12pt 8pt 0;
}

table, td, th {
  border-collapse: collapse;
}

table > caption {
  font-size: 12pt;
  font-weight: bold;
  text-align: left;
  border: 1px solid #333;
  color: #eee;
  background-color: #333;
  padding-left: 0.2em;
}

td, th {
  border: 1px solid #333;
  padding: 0.2ex 0.4em 0.2ex 0.2em;
}

th {
  text-align: left;
}

tfoot td {
  font-size: smaller;
}

.app {
  position: relative;
  display: flex;
  flex-flow: row wrap;
  align-items: stretch;
  height: 100%;
}

.app > * {
  padding: 4px;
  flex-grow: 1;
  flex-basis: 100%;
}

.header, .footer {
  background-color: #333;
  color: #eee;
  vertical-align: middle;
}

.header {
  font-size: 15pt;
  font-weight: bold;
}

.footer a {
  color: #ddd;
}

.footer a:visited {
  color: #ccc;
}

.msg-container {
  background-color:rgb(238, 143, 0);
  color: white;
  height: 3ex;
  vertical-align: middle;
}

#msg {
  vertical-align: middle;
}

#output-pane, #input-pane {
  background-color: white;
  color: black;
  font-family: 'Roboto Mono', monospace;
  font-size: 12pt;
  margin: 4pt;
  border: 1px solid #444;
}

#input-pane {
  min-height: 4ex;
  word-break: break-all;
  overflow-y: auto;
  width: auto;
}

#input-pane:empty:not(:focus):before, #output-pane:empty:not(:focus):before {
  content: attr(data-text);
  color: #999;
}

#output-pane {
  word-break: break-all;
  overflow-y: scroll;
  width: auto;
  height: 24px;
}

.result-container {
  margin-bottom: 4pt;
}

.expression {
  padding: 0 0.2em;
  background-color:rgb(238, 143, 0);
  color: white;
  display: inline-block;
}

.result {
  padding: 0 0.2em;
  display: inline;
}