Responsive Design With Html and CSS

Hi Ehtesham,

I have some little tips to improve your code:

1. add alt to <img>
2. ids should be unique
3. use <article> for cards instead of <section>
4. add meta description for better SEO
5. Heading elements should be used sequentially, you shouldn't skip levels.
6. use <p> instead of h3 <h3 class="joinedheading">35,000+ already joined</h3>
7. there should be only one <h1> tag in a page

<h1> simple bookmark manager </h1>  

<h2> Features </h2>    

 <h2> download extension</h2>   
 
 <h2>FAQ </h2>    

 <h2> stay up to date</h2>   

Hope you find this helpful