#configure { background-color: #333; color: #ccc; border-top: 1px solid #eee; border-bottom: 1px solid #eee; padding: 1em 0; margin: 2em 0; }

#apply { opacity: 0.5; transition: opacity 0.3s; }
.configuring #apply { opacity: 1; }

#snippet { width: 100%; max-width: none; font-size: 0.8em; height: 8em; }

article.page- h1 { font-size: 4em; }
article.page- h1 a { color: inherit; text-decoration: none; }
article.page- h1 .version { color: #333; font-size: 18px; font-weight: normal; }