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As of this post, using firefox 60.0.1 under ubuntu 16.04, the following is available:

Right click on part of a page you want to modify, then click on inspect element, {} style editor, poal.css for raw CSS codes you can copy/paste into your stylesheet.

For changing a color, you can stop after the first 2 steps:

Right click on part of a page you want to modify, then click on inspect element.

Then look on the right side for what CSS codes are used for the parameter you want to modify, and which source has the final say in the result. You can then jump into that source by clicking on it, and if everything works properly, you should be on the start of the function that gave the result color.

For Generic examples to draw inspiration from, look for CSS templates and examples

as of this post, this web site has a ton of examples with generator pages to modify these examples:

https://www.w3schools.com/Css/css_examples.asp

Some CSS examples for changing color is both day mode and night mode:

https://poal.co/s/Poaldev/4483/4cd1f14a-0929-408f-80d9-411ae1d45569

Note:

CSS on Poal has been significantly modified from the examples on that site, but the same concepts should apply. Intelligence, creativity, and a bit of luck may be required.

As of this post, using firefox 60.0.1 under ubuntu 16.04, the following is available: Right click on part of a page you want to modify, then click on inspect element, {} style editor, poal.css for raw CSS codes you can copy/paste into your stylesheet. For changing a color, you can stop after the first 2 steps: Right click on part of a page you want to modify, then click on inspect element. Then look on the right side for what CSS codes are used for the parameter you want to modify, and which source has the final say in the result. You can then jump into that source by clicking on it, and if everything works properly, you should be on the start of the function that gave the result color. For Generic examples to draw inspiration from, look for CSS templates and examples as of this post, this web site has a ton of examples with generator pages to modify these examples: https://www.w3schools.com/Css/css_examples.asp Some CSS examples for changing color is both day mode and night mode: https://poal.co/s/Poaldev/4483/4cd1f14a-0929-408f-80d9-411ae1d45569 Note: CSS on Poal has been significantly modified from the examples on that site, but the same concepts should apply. Intelligence, creativity, and a bit of luck may be required.

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[–] • 2 pts

Nice. I have no skill at CSS, but I want to tinker.

[–] • 1 pt

easiest way to find bugs is to try something out and see how it works, or takes notes if it does something weird.

[–] • 2 pts

Is there a way to insert a link, and write over the URL with a a response?

[–] • 1 pt

To prevent doxxing, external links are disabled.

You can upload an image in the Spreadsheet editor of the sub you are modding and add the tag in the css to load it as a background image or pattern.

[–] • 1 pt

that sounds like you have several steps in what you want to have done. each step you can break things down into will help you find an example of each step. Combining all those steps together and working as intended is where the luck comes in.

the steps i see are:

Insert a link

I think you need to describe 'where' this link is, or the conditions of how this link is located.

Write over a url

the :hover command sounds like a good place to start

"writing over" may be easier to do if you just hide the url and display the text

https://www.w3schools.com/Css/tryit.asp?filename=trycss_visibility_hidden

display text at location

using :after sounds like a good place to start

https://www.w3schools.com/Css/tryit.asp?filename=trycss_after