it is built with flexbox.
<nav className="n-nav"><a className="n-nav-link active" href="#">Active</a><a className="n-nav-link" href="#">Link</a><a className="n-nav-link" href="#">Link</a><a className="n-nav-link disabled" href="#">(Disabled)</a></nav>
by adding .n-nav-flat class it will appear in flat top style.
<nav className="n-nav n-nav-flat"><a className="n-nav-link active" href="#">Active</a><a className="n-nav-link" href="#">Link</a><a className="n-nav-link" href="#">Link</a><a className="n-nav-link disabled" href="#">(Disabled)</a></nav>
by addding .n-no-hover class it will avoid to appear pressed when hovering.
<nav className="n-nav n-no-hover"><a className="n-nav-link active" href="#">Active</a><a className="n-nav-link" href="#">Link</a><a className="n-nav-link" href="#">Link</a><a className="n-nav-link disabled" href="#">(Disabled)</a></nav>