Balint Toth

Hello!

You can do it easily with creating a child theme and adding some custom css rules to the menu bar. Can you provide a link to your site so I could take a look, and some detailed info how you would like it to look, so I can create the CSS for you.

You can find detailed info on how to create a child theme here: http://codex.wordpress.org/Child_Themes

But if you have any additional questions, just post it here, I am happy to help!

Greetings,
Balint

Could you please provide a link to the site, so I could check it out?
Thank you!

You are welcome!

Thank you for the link.

Absolutely not, that is a core WordPress feature, which enables logged in users who have the proper privileges to edit the posts and pages, but it is completely safe, and you should not worry about that.

So, if you have created your child theme, this is what you should put into the child theme’s style.css file, to the bottom:

.hgroup-wrap {
	padding: 0;
	display: none;
}

#main-nav {
	background: #57ad68;
	border: 1px solid #439f55;
}

#main-nav a:hover, #main-nav ul li.current-menu-item a, #main-nav ul li.current_page_ancestor a, #main-nav ul li.current-menu-ancestor a, #main-nav ul li.current_page_item a, #main-nav ul li:hover > a {
	background: #439f55;
}

So a little description for this: the .hgroup-wrap gets rid of the white space on the top.
The #main-nav part determines the whole navigation bar’s background and border color (it has a thick green border around it). So in order to change the color, just change the #57ad68 and #439f55 values.
The last part of the code determines the menu item’s color when you hover over one with the mouse, so again, change the #439f55 value to your needs.
These are HEX color values, so if you are not familiar with these, then you can find a great color picker at http://www.colorpicker.com/.
There, just pick a color, and above the color palette box you can find the 6-character value, just copy and paste that in the css, just make sure that the # sign is always there in the css, because the color picker does not give you one.

I hope this helps, if you have any issues or questions, just post them here.

Greetings,
Balint

Hello!

It looks like you should make a child theme, copy the category.php theme to the child theme’s directory and edit that file, but it requires some php knowledge. Basically this file generates every category-based listing site in the twentytwelve theme.

You can find a detailed description on how to create a child theme here:
http://codex.wordpress.org/Child_Themes

Greetings,
Balint

Hello!

Could you please provide a link to your site?

I am not an expert on this, but my first thought is, is it sure that both buttons have the same css class and no specific ids to differentiate them?

Greetings,
Balint

Hello!

Could you please provide a link to your site so we could provide better help?

It looks like that you will have to create a child theme, which allows you to make some css changes to your theme, and these changes remain intact when you update your theme. You can find detailed info on how to create a child theme here:
http://codex.wordpress.org/Child_Themes

If you can provide a link, I can give you the specific css code you will need in order to make the necessary modifications.

Greetings,
Balint