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

body {
  font-family: system-ui, sans-serif;
  font-weight: normal;
  font-size: 1.1em;
  max-width: 40rem;
  padding: 1rem;
  margin: auto;
  line-height: 1.5rem;
  padding-top: 2rem;
}

.version {
    display: grid;
    width: 100%;
    border: 1px solid red;
    grid-template-columns: 1fr 2fr;
    border: 1px solid #e1e5e5;
    margin-bottom: 1em;
}

.version-section {
    padding: 1em;
    position: relative;
}

.version-section.demo {
    aspect-ratio: 1 / 1;
}

.version-section.code {
    border-left: 1px solid #e1e5e5;
}

.version-section.code textarea {
    box-sizing: border-box;
    width: 100%;
    height: 100%;
}

footer {
    text-align: center;
    font-size: 0.9em;
}