.url-copied { padding-top:.6em; }

h1 .version { opacity: 0; font-size: 0.8em; font-family: monospace; letter-spacing: -5px; transition: .25s opacity linear; }
h1:hover .version { opacity: .3; }

pre { position: relative; }
pre a.btn { display: none; position: absolute; right: 2px; top: 2px; }
pre:hover a.btn { display: block; }

.builder .blocks { overflow: hidden; }
.builder .blocks .block { min-height: 38em; }