Transparent website header does not look great when mixed with main body

[0xmichalis]

I like the simplicity of the header and the website in general but we may want to consider using a non-transparent header to avoid mixing header letters with body letters which is not a great UX. I can submit a PR if folks are happy with the change. If this has been discussed in the past and the consensus was to keep it as is feel free to close this issue.

[lehnberg]

It's a conscious design decision, very much in vogue these days I believe.