// media queries

https://www.w3schools.com/css/css_rwd_mediaqueries.asp

https://responsivedesign.is/ develop/browser-feature- support/media-queries-for- common-device-breakpoints/

https://css-tricks.com/ snippets/css/media-queries- for-standard-devices/

//last stable version

http://getbootstrap.com/
http://getbootstrap.com/components/#navbar
http://getbootstrap.com/css/#overview
//latest version

http://devdocs.io/bootstrap~4/

https://v4-alpha.getbootstrap.com/


 

https://app.fontastic.me/accounts/login/

http://fortawesome.github.io/Font-Awesome/

http://pxtoem.com/

PX to EM
Formula: size in pixels / parent size in pixels
Example: 12px / 16px = .75em
PX to %
Formula: size in pixels / parent size in pixels * 100
Example: 12px / 16px * 100 = 75%






