Change the Add to Cart Custom Html appearence

Hello there!
Very nice e-commerce joomla extension!
If I may ask, how do I change the appearence of the Add to Cart Custom Html link? I would like to make an image button to replace the text through CSS, but I can't find the CSS location of the hikashop_html_add_to_cart_link class. Can you please help me?
Thank you!

All the CSS of HikaShop can be edited via the CSS edition interface which is in the configuration, under the tab display.

there is no default CSS for the class hikashop_html_add_to_cart_link so you just have to add it like that:

.hikashop_html_add_to_cart_link{
background-image: url('http://my_website.com/my_image.jpg');
}

Thank you very much!
I'll try this immediately.
By the way: great support you have here! You are the best!

I am back.
I have tried your suggestion but it doesn't seem to work.
I went to system/configuration/display/css/frontend css file/ and I have edited the default css, resulting in the creation of frontend_custom1.css. I have simply added to the end of the file the following code:

Unfortunately, no change to the custom html button appearance.
Any suggestions? Did I do something wrong?

That CSS is only loaded on pages where hikashop is used. If you use that link somewhere else, the CSS might not be loaded. In that case, you should add that CSS code to your template CSS.

Thank you!
Now it's working.

Im sorry.... but I did not understand very well in what exact place I have to write your code in my template ... I already use Artisteer .. I also want to place an empty cart image..could you help me please..

You need to add that CSS code in your template CSS:
joomlatp.com/joomla-css/edit-joomla-css-...with-css-editor.html