Hide empty Shorts shelf when all items are hidden

[Mat4B]

Description:

When Shorts are hidden, YouTube sometimes still renders the Shorts section (ytd-rich-section-renderer) even though all items inside are hidden (hidden attribute).
This results in an empty Shorts block taking space on the homepage.

A working CSS fix:

ytd-rich-section-renderer:not(:has(ytd-rich-shelf-renderer:not([hidden]))) {
  display: none !important;
}

This hides the entire Shorts section when all ytd-rich-shelf-renderer elements are hidden.