.gtl-viewer { font-family: sans-serif; }
.gtl-row    { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; margin-bottom: .5rem; }

#gtl-map {
  width: 100%;
  height: 600px;
  border: 1px solid #888;
}

select, input[type=range] { cursor: pointer; }