/* @import url('http://example.com/example_style.css'); */

/***********************************************/
/* CSS @imports must be at the top of the file */
/* Add them above this section                 */
/***********************************************/

/*****************************************/
/* Start your style declarations here    */
/*****************************************/
<style>
  .hs-search-field__form .combobox {
    border-radius: 30px;
  }

  .hs-kb-search-input-wrapper {
    background-color: pink;
  }
</style>