I wrote a guide with all the rules I stick to when creating a new responsive design, which will really help you: polypane.app/blog/responsive-desig...
Using media queries is not a problem but it's important to consider how you use them. If you just add one whenever you need it, you'll make your live way more complicated. So pick a direction (mobile first or desktop first) and stick to it. After that, having a tool that can keep track of your media queries is a big help (this is something Polypane can do for you, check it out!)
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I wrote a guide with all the rules I stick to when creating a new responsive design, which will really help you: polypane.app/blog/responsive-desig...
Using media queries is not a problem but it's important to consider how you use them. If you just add one whenever you need it, you'll make your live way more complicated. So pick a direction (mobile first or desktop first) and stick to it. After that, having a tool that can keep track of your media queries is a big help (this is something Polypane can do for you, check it out!)