Apply suggestions from code review

Co-authored-by: Dipika Bhattacharya <[email protected]>

files/en-us/web/css/css_syntax/index.md

@@ -7,11 +7,11 @@ spec-urls: https://drafts.csswg.org/css-syntax
 
 {{CSSRef}}
 
-The **CSS syntax** module describes, in general terms, the structure and syntax of cascading stylesheets, or CSS. It defines CSS as the language for describing the rendering of structured documents (such as HTML and XML), whether on the web or anywhere else.
+The **CSS syntax** module describes, in general terms, the structure and syntax of cascading stylesheets, or CSS. It defines CSS as the language for describing the rendering of structured documents (such as HTML and XML), on the web and elsewhere.
 
-The CSS syntax module doesn't define any properties, {{cssxref("css_types", "data types")}}, {{cssxref("css_functions", "functions")}}, or {{cssxref("at-rule", "at-rules")}}. Rather, this module defines how all of these features are defined and how user agents should parse CSS.
+This module doesn't define any properties, {{cssxref("css_types", "data types")}}, {{cssxref("css_functions", "functions")}}, or {{cssxref("at-rule", "at-rules")}}. Rather, it elaborates on how all of these features should be defined and how user agents should parse CSS.
 
-The module explicitly states that {{cssxref("@charset")}} is not an actual at-rule, but rather an unrecognized legacy rule to be dropped when a stylesheet is grammar-checked.
+The module explicitly states that {{cssxref("@charset")}} is not an actual at-rule, but rather an unrecognized legacy rule that should be omitted when a stylesheet is grammar-checked.
 
 ## Reference
 
@@ -40,18 +40,18 @@ The module explicitly states that {{cssxref("@charset")}} is not an actual at-ru
 
 - [Value definition syntax](/en-US/docs/Web/CSS/Value_definition_syntax)
 
-  - : The formal grammar for defining valid values for CSS properties and functions, along with semantic constraints. A guide to CSS component value types, combinators, and multipliers.
+  - : The formal grammar for defining valid values for CSS properties and functions, along with semantic constraints. A guide for understanding CSS component value types, combinators, and multipliers.
 
 - [CSS syntax error handling](/en-US/docs/Web/CSS/CSS_syntax/error_handling)
   - : Overview of how the user-agent handles
 
-## Related Concepts
+## Related concepts
 
-[CSS selectors](/en-US/docs/Web/CSS/CSS_selectors) module
+[CSS selectors](/en-US/docs/Web/CSS/CSS_selectors) module:
 
 - [specificity](/en-US/docs/Web/CSS/Specificity)
 
-[CSS Cascade](/en-US/docs/Web/CSS/CSS_cascade) module
+[CSS cascade](/en-US/docs/Web/CSS/CSS_cascade) module
 
 - {{cssxref("@import")}} at-rule
 - {{cssxref("important")}} flag
@@ -60,12 +60,12 @@ The module explicitly states that {{cssxref("@charset")}} is not an actual at-ru
 - [Used values](/en-US/docs/Web/CSS/used_value)
 - [Actual values](/en-US/docs/Web/CSS/actual_value)
 - [inheritance](/en-US/docs/Web/CSS/Inheritance)
-- {{Glossary("Property/CSS", "property")}}
+- {{Glossary("Property/CSS", "CSS property")}} glossary term
 
-[CSS Custom Properties for Cascading Variables](/en-US/docs/Web/CSS/CSS_cascading_variables) module
+[CSS custom properties for cascading variables](/en-US/docs/Web/CSS/CSS_cascading_variables) module:
 
 - [custom property (`--*`)](/en-US/docs/Web/CSS/--*)
-- {{cssxref("var()")}}
+- {{cssxref("var")}}
 
 [CSS conditional rules](/en-US/docs/Web/CSS/CSS_conditional_rules) module
 
@@ -92,4 +92,4 @@ The module explicitly states that {{cssxref("@charset")}} is not an actual at-ru
 ## See also
 
 - [CSS selectors](/en-US/docs/Web/CSS/CSS_selectors) module
-- [CSS values & units](/en-US/docs/Web/CSS/CSS_values_and_units) module
+- [CSS values and units](/en-US/docs/Web/CSS/CSS_Values_and_units) module