My phone’s auto-correct did its wonders. In my comment above I meant to type that you should omit the word /static/ from the link to the stylesheet and instead what was published in my comment was commit (which is wrong).
Change the link to:
< link rel=“stylesheet” type=“css/text” href="/css/hyphen.css">
You never reference the static folder when linking to a file that is its child.
The only time such a reference is needed is when there is a need to traverse a project’s directory structure with the readDir and readFile functions.
P.S. Also take care not to copy paste quotes from the forum because Discourse changes these into smart quotes and these will not work in Go templates.