diff --git a/src/epub_converter/css_reader.py b/src/epub_converter/css_reader.py
index f7828ef..20363f6 100644
--- a/src/epub_converter/css_reader.py
+++ b/src/epub_converter/css_reader.py
@@ -301,6 +301,20 @@ class TagStyleConverter:
         return clean_style
 
     def preprocess_style(self):
+        def remove_extra_spaces(style: str) -> List:
+            # replace all spaces between '; & letter' to ';'
+            style = re.sub(r"; *", ";", style)
+            split_style = style.split(';')
+
+            # when we split style by ; and we have at the end ; that's why we have '' in list
+            while '' in split_style:
+                split_style.remove('')
+
+            # replace all spaces between ': & letter' to ':'
+            split_style = [el.replace(
+                re.search(r'(:\s*)', el).group(1), ':') for el in split_style]
+            return split_style
+
         ultimate_style = self.tag_with_ultimate_style.attrs.get('style') + ';'
         ultimate_style = self.remove_white_if_no_bgcolor(
             ultimate_style, self.tag_with_ultimate_style)
@@ -308,29 +322,12 @@ class TagStyleConverter:
             'background:', 'background-color:')
         ultimate_style = ultimate_style.replace(
             'list-style-image', 'list-style-type')
-
-        split_ultimate_style = ultimate_style.replace('; ', ';').split(';')
-
-        # when we split style by ; and we have at the end ; that's why we have '' in list
-        while '' in split_ultimate_style:
-            split_ultimate_style.remove('')
-
-        # replace all spaces between ': & letter' to ':'
-        split_ultimate_style = [el.replace(
-            re.search(r'(:\s*)', el).group(1), ':') for el in split_ultimate_style]
+        split_ultimate_style: List = remove_extra_spaces(ultimate_style)
 
         if self.tag_with_inline_style.attrs.get('style'):
             inline_style = self.tag_with_inline_style.attrs['style']
 
-            split_inline_style = inline_style.replace('; ', ';').split(';')
-
-            # when we split style by ; and we have at the end ; that's why we have '' in list
-            while '' in split_inline_style:
-                split_inline_style.remove('')
-
-            # replace all spaces between ': & letter' to ':'
-            split_inline_style = [el.replace(
-                re.search(r'(:\s*)', el).group(1), ':') for el in split_inline_style]
+            split_inline_style: List = remove_extra_spaces(inline_style)
 
             # repetition check - if the tag had already had inline style that isn't in the css styles, add this to style parsed from css
             repeat_styles = list(set(split_ultimate_style)
@@ -339,7 +336,7 @@ class TagStyleConverter:
                 split_inline_style.remove(item)
 
             if split_inline_style:
-                # if inline style is not empty - start convert and add to ultimate style
+                # if split_inline_style is not empty - start convert and add to ultimate style
                 print('we enter repetition check', '\n')
                 inline_style: str = self.process_indents_to_px(
                     split_inline_style)