@PetrusVermaak I am also struggling with unbrowse'able cops library using default templates.
The bootstrap theme is even worse, as it's completely unreadable on kindle readers.
I wasn't fond of @Jocala css fixes in #414 , and since I haven't found in webz any custom made template for cops I had to roll up my own sleeves.

The simplest way possible, working with all default styles is this:

1. edit /templates/default/file.html
2. scroll to bottom, and before ending </header> tag add below code:

<style media="screen" type="text/css">
body{zoom:150%;}
a {color:#000;}
.container section {font-size:150%;line-height:150%;}
.download a {display:inline-block;width: 100%;color:#000;border: 1px solid #000;background:#FFF;margin:0 0 3px 0;}
.download a[title*="Reader"] {display:block;}
.download a[title*="Open"],
.books {padding:10px 0;overflow: auto;}
.books .download a:nth-of-type(even) {display:none;}
footer {overflow:auto;}
footer,footer div {height:auto !important;}
footer a {display:block;padding:10px;font-size:150%;}
</style>

If you want to make only one subset of default template, add above styles in respective css file.

@Joduai, you're da man!!! Thank you so much! This is awesome!!

@PetrusVermaak
Thanks 😊
I went further with all this mess, as I wanted to get a smooth looking and readable online library in all possible ways.
Could you check this one, and let me know?
https://github.com/Joduai/cops-kindle/tree/master

I tested this on voyage 1, so I can't assure it will be handled well on other generations.
Could you tell me what type of kindle reader do you have?

@Joduai, I use my smartphone and so does my wife, but it's similar to the kindle... Your source code allowed for bigger text so that's great!!!

Your code works perfect with our installation of cops. Thank you so much!