Boostrap

Presentation

Bootstrap is the most popular HTML, CSS, and JS framework

Starting with boostrap

Getting Started

Grid System

If you do not want to use all 12 column individually, you can group the columns together to create wider columns:

Bootstrap' grid system is responsive, and the columns will re-arrange depending on the screen size: On a big screen it might look better

grid class

   xs (for phones)
   sm (for tablets)
   md (for desktops)
   lg (for larger desktops)