epub converter: fix premailer cant read namespace css

src/css_reader.py

@@ -179,6 +179,7 @@ def clean_css(css):
 
 
 def add_inline_style_to_html_soup(soup1, css_text):
+    css_text = css_text.replace('@namespace epub "http://www.idpf.org/2007/ops";', '')
     livecarta_tmp_ids = []
     h_regex = f'(^h[1-9]$)'
     could_have_style_in_livecarta_regexp = re.compile('(^p$)|(^span$)|(^li$)|(^ul$)|(^ol$)|(^td$)|(^th$)|' + h_regex)
@@ -186,7 +187,6 @@ def add_inline_style_to_html_soup(soup1, css_text):
     for i, x in enumerate(elements_with_possible_style_attr):
         x.attrs['livecarta_id'] = i
         livecarta_tmp_ids.append(i)
-
     html_with_inline_style = transform(str(soup1), css_text=css_text,
                                        remove_classes=False,
                                        external_styles=False,
@@ -202,8 +202,11 @@ def add_inline_style_to_html_soup(soup1, css_text):
             # if bg color is inherited, just return style as is
             for parent_tag in tag.parents:
                 # white bg color not need to be checked as we do not write 'white bg color'
-                if parent_tag.attrs.get('style') and ('background' in parent_tag.attrs.get('style')):
-                    print(tag, parent_tag.attrs.get('style'))
+                tag_with_bg = ['span', 'td', 'tr', 'p']
+                tag_will_be_saved = parent_tag.name in tag_with_bg
+                has_bg = parent_tag.attrs.get('style') and ('background' in parent_tag.attrs.get('style'))
+                if has_bg and tag_will_be_saved:
+                    print(tag, parent_tag.attrs.get('style'), parent_tag.name)
                     return style_
 
             children = tag.find_all()