Template not functioning correctly

Thanks Ivan!

I do know how to set the style for H3 - H5 but I dont know how to set the style for the border of the pictures/images. Can you give me the html code? (to find the code for the right color is not the problem)

Well it is:

.item IMG, .item-page IMG{
border: 3px solid #000000!important;
}

this is for images inside of articles in j2.5.
You can put that at bottom of template_css.css

Now the problem is, that all images border automaticly 3px and in that color.
But sometimes I would like to have a border and sometimes not.
If I open "Insert/Edit Image" there is normally the posibillity to change the border (but unfortunately not the color, than this problem would not be).
But now iff I set the Border "0", the border is still displayed with 3px.
So, what do do?

send link

www.tip-reisen.de/

template_css.css:

.item img, .item-page img {
border: 3px solid #666 !important;
}

remove !important