greggubarev a5840c96d9 Responsive Web Design: Added hint to Create a Custom CSS Variable (#19605) ...

Added hint to Create a Custom CSS Variable (https://guide.freecodecamp.org/certifications/responsive-web-design/basic-css/create-a-custom-css-variable)

2018-10-17 16:47:39 +05:30

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Responsive Web Design: Added hint to Create a Custom CSS Variable (#19605)

2018-10-17 16:47:39 +05:30