luanti/util/master/style.css

table {
  max-width: 100%;
  background-color: transparent;
  border-collapse: collapse;
  border-spacing: 0;
}

td, th {
  border: 1px solid gray;
}

div#table table {
  width: 100%;
}

.mts_mods {
  visibility: hidden; 
  border:gray solid 1px; 
  position:absolute; 
  z-index:100; 
  background-color:white; 
  padding:.5em;
}

.mts_version:hover .mts_mods {
  visibility: visible;
}

.mts_version.mts_ismods {
  text-decoration:underline; 
  text-decoration-style:dashed;
}