* { 
  box-sizing: border-box;
}

body {
  max-width: 800px;
  font-family: Arial;
  font-size: 1.25em;
  text-align: center;
  margin: auto;
  width: 100%;
  padding: 0.5em;
}

a {
  color: #008C28;
  font-weight: bold;
  text-decoration: none;
}

p.instructions {
  text-align: justify;
}

h3 {
  word-wrap: break-word;
  white-space: pre-wrap;
}

textarea {
  width: 100%;
  padding: 0.5em;
  border-radius: 3px;
  border: 1px solid silver;
}

button {
  border-radius: 5px;
  background-color: #008C28;
  color: white;
  border: none;
  padding: 0.25em 1em;
  font-size: 1.25em;
  float: right;
  margin-top: 0.5em;
}

img {
  max-width: 100%;
}

pre {
  max-width: 100%;
  width: 100%;
  padding: 0.5em;
  border-radius: 3px;
  text-overflow: ellipsis;
  overflow: hidden;
  text-align: left;
  word-wrap: break-word;
  white-space: pre-wrap;
}

code {
  border-radius: 0.25em;
}

.CodeMirror {
  border-top: 1px solid black;
  border-bottom: 1px solid black;
  height: auto;
}