You need to add the following codes in your WordPress Dashboard > Appearance > Customize > Additional CSS.
Add padding to your filters
.modula .filters a { padding-left: 10px; }Make the font larger
.filters a { font-size: 20px; }Increase the spacing between the filters
.modula .filters a { margin: 0 20px 0 0 !important; }Change the filters font
.modula>.filters .modula_menu__link{ font-family:“Alef” }Note: You need to add a font that is already used on your site. Otherwise, the font will not change.
Align the filters when using the drop-down menu option
.modula-gallery.horizontal-filters .filters { text-align: center; 