Expositio theme / Footer, line-height, font-size, menu, images quality query

Hi,

I’m using EXPOSITIO (localhost) and I’m working in the child theme. I have tried to contact to the developers through different places but they are not replying me.

I have some questions related to this theme, I posted the issues in different posts, so maybe it’s better to put it together:

1 – The footer is located in the header, and I can change the content, but there are 2 lines, and I can not modify the line-height. How can I do it?

2 – My site-navigation li structure is:

Category 1 (Contains 2 projects)
Post 1 (project 1)
Post 2 (project 2)
Page (contact page)

I would like to put the “Category 1” in bold, not all the “site-navigation li”, just the word “Category 1”. Is it possible?

I would like also to use a different line-height deppending of the line. I mean, Between Category 1 and Post 1 (one concrete height) and between Post 1 and Post 2 (another different height). Is it possible?

3 – I would like to modify the title font-size of the pages and posts (or remove it). I tried to add <?php //the_title();?> instead of <?php the_title();?> on content-page.php, but it doesn’t work.

Content page code: https://pastebin.com/UubWqKsb

4 – The quality of the uploaded images is really bad. I’m trying to add vectorial images (just 2 colors) saved for web, and they appears blurry and undefined. I tried to add the following code in functions, but it doesn’t work. How should I do it? The photographies are in good quality, but not the vectorial images.

add_filter(‘jpeg_quality’, function($arg){return 100;});
add_filter( ‘wp_editor_set_quality’, function($arg){return 100;} );

I attach some leaves of the theme, just in case you need it:

Functions.php : https://pastebin.com/8DsX5tGu
Style.css: https://pastebin.com/0wbmNggZ
Conten-page.php : https://pastebin.com/yLHveBzm
Header.php : https://pastebin.com/2tje87ck

Thank you and sorry for the long post.