You're really not using a child theme. ;)
Create a directory called
wp-content/themes/wordsmith-anvil-child and put this
style.css in it.
Theme Name: Wordsmith Anvil Child
Description: Child theme for the Wordsmith Anvil theme
Author: Self Help WordPress User
/* Put your CSS after this line */
Wordsmith Anvil Child theme in your WordPress dashboard.
Then use a CSS tool such as Firebug and inspect the menu bar. When you identify the CSS (I think it's
#header but play with it) then add that to the