Flat Design,a popular user interface and to have an idea how does the flat design looks like,I've written a bit of code to show you the live demo through a pen.So have a look at the pen below.
If the pen is not visible correctly check this.
2013-2016 Copyright Blogger E\ver . Coded, managed and founded by Mohammad Hamza (@hamzadhamiya) . Hosted on Blogger and fonts used are Raleway and Open Sans.