static :
relative : relatice to itself
fixed: relatice to the browser window
absoute:relative to its parent

display: inline
inline-block ??

box model:
margin
border
padding

box-sizing : border-box
-moz-box-sizing

float property
overflow:auto ; if an element goes out of the box then with this one the element will get enlarged to accomodate the overfolowed element

text-align: center ; check it