Frist interaction with CSS

FULL FORM OF CSS : Cascading Style Sheets.

what is Cascading : it simply means overwriting ( note : not deleting but overwrite )

supposed you write simple web page with just HTML, only using H1, H2, P tag

when you when your web page same as you write code but in some area browser also apply stylling from his side, like WHAT ?

In this above example you can see, button has padding, margin to this button

and no i did not add this, i just add button but excitment part is that Browser add this padding and margin by his self..!

what if i want to add padding or margin by myself, can i do that, Answer is YES

do i have to delete this pre padding given by browser to add other padding, NO

you can sipmply overwrite this

in above image you can see browser already apply border color as buttonborder

but we can simply overwrite it

like this we simply overwrite border color from buttonborder to red

this overwriting of code is called Cascading