html - CSS Image not touching top -

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I'm creating a navigation bar is horizontal and touches both the sizes of the screen is only a problem that the top does not touch (as you can see yellow rectangle does not touch on the top) I had it I'm in CSS: 

  html, body {margin: 0; Padding: 0; }

HTML code: 

  & lt; Div id = "nav" & gt; & Lt; Ul & gt; & Lt; Li & gt; & Lt; A href = "/ test" & gt; Home & lt; / A & gt; & Lt; / Li & gt; & Lt; / Ul & gt; & Lt; / Div & gt;

What am I doing?

Your & lt; Ul & gt; Display is set as: block; by default. You are looking at the break of the line that comes before it. You eat it as a margin-top in your CSS: -10px;


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