border width can accept 1, 2 or 4 numbers, it always moves clockwise starting at the top
decimals are base 10 is how we count with 10 digits
binary has is base 2 (only having 0 and 1)
hexadecimal is base 16 0 through F (lowest value is 00 and highest value is FF(which = 255) )
hex color codes #00FF00 The first two digits reperesent red value, the second two digits represent green value and the next/last two digits represent blue value
link is how you connect a style sheet to an html doc
in the line above the rel stands for relationship and the href is the local path so that the document knows where to look
margin 0 auto; automatically centers your content, but FIRST you must establish the set number of pixles (for the width) before hand or the 0 auto does not work
each property in CSS must have a semicolon at the end to state that that property change is finished
media queries deals with screen sizes
you can use percentages like 100% so that it takes up whatever space is available on the device and then later you can inherit from the percentage above so you can adjust the window