2 questions for the html/css?

1. jsfiddle.net/mhof8rkL
Why is the indentation of the paragraph (in units similar) appears relative to the window, not the block in which it is located?
2. There is a horizontal menu:
Three points between paragraphs, how to implement?
September 18th 19 at 23:49
1 answer
September 18th 19 at 23:51
1) Google "collapsing margins". Lechitsya adding the unit to the parent of a border or padding top.
2) boder-left: dotted, to set the desired row height and remove the first item (fist-child)

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