Hi Anthany,
It’s possible, but you would need multiple media Queries to make the menu items paddings and font-size smaller as the screen gets smaller.
For instance, if you add something like this in Appearance > Customize > Additional CSS, the font-size and padding of the menu items would decrease depending on the breakpoint:
@media (max-width: 908px) {
#primary-menu > ul > li.menu-item > a {
font-size: 12px;
padding-left: 15px;
padding-right: 15px;
}
}
@media (min-width: 909px) and (max-width: 986px) {
#primary-menu > ul > li.menu-item > a {
font-size: 13px;
padding-left: 25px;
padding-right: 25px;
}
}
@media (min-width: 987px) and (max-width: 1141px) {
#primary-menu > ul > li.menu-item > a {
font-size: 15px;
padding-left: 25px;
padding-right: 25px;
}
}
You’ll just need to set the font-size and padding per breakpoint you want. You may add more if needed.
Hope this clarifies!