body {
  font-family: sans-serif;
  max-width: 50em;
  margin: auto;
}

h2 {
  margin: 1ex 0 0 0;
  font-size: 120%;
}

h2:first-child {
  margin-top: 0.5em;
}

.next-group {
  padding-left: 3em;
}

#mathml-input {
  font-family: monospace;
  font-size: 100%;
  padding: 0.3em;
  width: 100%;
  box-sizing: border-box;
}

#render-button {
  display: block;
  font-weight: bold;
  background-color: lightgreen;
  margin-top: 1ex;
  margin-bottom: 3ex;
  margin-left: auto;
  margin-right: auto;
}

#mathml-output {
  font-size: 110%;
  margin-top: 0em;
  border: 1px solid grey;
  padding: 0.25em;
  min-height: 3em;
  width: 100%;
  white-space: pre;
}

select {
  appearance: none;
  outline: 0;
  background: rgb(176, 236, 176);
  background-image: none;
  height: 100%;
  color: black;
  cursor: pointer;
  border: 1px solid black;
  border-radius: 3px;
  font-size: 90%;
}

.select {
  position: relative;
  height: 2em;
  line-height: 3;
  overflow: hidden;
  border-radius: 0.25em;
  padding-bottom: 10px;
}

option {
  background: rgb(225, 255, 225);
  color: black;
  font-size: 90%;
}

textarea {
  word-wrap: normal;
}

#speech, #braille {
  min-height: 3em;
  width: 100%;
  border: 1px solid #AAA;
  background-color: #F8F8F8;
  padding: 0.5em 0.5em 0.5em 1.5em;
  overflow: auto;
}

#mathml-output:focus-within {
  outline-width: 2px;
  outline-style: solid;
  outline-color: green;
}

#outer-table {
  width: 100%;
}

#braille {
  font-family: courier;
  font-size: 150%;
}

.sync-highlight {
  color: yellow;
  background: blue;
  outline-color: blue;
  outline-style: solid;
  outline-width: 1px;
  outline-offset: 0px;
}

.nav-highlight {
  outline-color: orange;
  outline-style: solid;
  outline-width: 2px;
  outline-offset: 0px;
}