Hey there,

It seems like your Joomla template is enforcing a height and padding on all inputs and that is bad because it also adds an !important tag. To fix this, add the block of css codes below into your template's css file,

body div#fd.es .es-toolbar .fd-navbar-search .search-query {

  height: auto !important;

  padding-top: 0 !important;

  padding-left: 35px !important;

}