*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 100%;
  margin: 2em;
}

h2 {
  margin-top: 2em;
}

label {
  user-select: none;
}

button, input, textarea {
  font-family: inherit;
  font-size: inherit;
  padding: 0.2em 0.5em;
}

textarea {
  width: 100%;
}

.outline {
  position: relative;
  padding: 0.5em 1em;
  border: 1px solid #ccc;
}

.outline button {
  position: absolute;
  right: 2em;
  top: 2em;
}

pre {
  padding: 0.5em;
  background-color: #ddd;
  border-radius: 3px;
}

code, kbd {
  font-family: Consolas, 'Courier New', Courier, monospace;
  font-size: 1em;
  user-select: all;
}

img, .block {
  display: block;
  margin: 0.3em;
}