Property Maring does not Exist

In the below URL, it says that "the property maring does not exist" on my
file at the line containing the characters "a.navlink {". Is something wrong
here? If so, what?
http://jigsaw.w3.org/css-validator/validator?uri=http://www.gamepasta.com/main.css&profile=css21&usermedium=all&warning=1〈=en<http://jigsaw.w3.org/css-validator/validator?uri=http://www.gamepasta.com/main.css&profile=css21&usermedium=all&warning=1&lang=en>

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Aviel Menter
Menter & Liptz Web Design Co.
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