.glossary-term{position:relative;cursor:help;border-bottom:1px dotted #666}
.glossary-term .glossary-tooltip{
  position:absolute;left:0;top:100%;z-index:1000;
  background:#111;color:#fff;padding:6px 8px;font-size:12px;
  line-height:1.3;max-width:260px;border-radius:4px;
  opacity:0;transform:translateY(4px);pointer-events:none;
  transition:opacity .15s,transform .15s
}
.glossary-term:focus .glossary-tooltip,
.glossary-term:hover .glossary-tooltip{
  opacity:1;transform:translateY(0)
}