styling overrides require more specific CSS selectors

[russellsamora]

For the results you just need:

:global([data-svelte-typeahead] li) {
  background: blue;
}

But for the form elements (input and label) you need:

:global([data-svelte-typeahead] [data-svelte-search] input) {
  background: blue;
}

[russellsamora]

this actually sometimes doesn't work, and requires the !important flag (in the case of the ul element), so maybe worth noting as well.