@dcent Ok, after removing the "�" symbol, and applying again the patch, I get:

patching file display.css
Hunk #17 FAILED at 1224.
1 out of 17 hunks FAILED -- saving rejects to file display.css.rej

Contents of display.css.rej:

*** /dev/null
--- /dev/null
***************
*** 1224
- font-size: 0;
--- 1234 -----
+ font-size: 0;

Don't worry about breaking anything, as I keep backups of everything, and I don't test these changes in production.

I'm sorry, I have no idea about mobile experience, as I don't own a smartphone. I do use an Android virtual machine from time to time, so I could test it there if necessary.

Nevertheless, I think that if you could contribute your changes in https://gnusocial.net/url/11347297 it would be easier for anyone willing to use "elbinario" theme with your changes.