The only thing you really need to know is how to use media queries.<p><a href="https:&#x2F;&#x2F;developer.mozilla.org&#x2F;en-US&#x2F;docs&#x2F;Web&#x2F;CSS&#x2F;Media_Queries&#x2F;Using_media_queries" rel="nofollow">https:&#x2F;&#x2F;developer.mozilla.org&#x2F;en-US&#x2F;docs&#x2F;Web&#x2F;CSS&#x2F;Media_Queri...</a><p><a href="http:&#x2F;&#x2F;www.w3schools.com&#x2F;css&#x2F;css_rwd_mediaqueries.asp" rel="nofollow">http:&#x2F;&#x2F;www.w3schools.com&#x2F;css&#x2F;css_rwd_mediaqueries.asp</a>