Table headers are rotated wrong direction in CppReference

[SigmaTel71]

Zeal 0.8.0, Windows 11 Pro 25H2 amd64.

To me it looks like a conversion issue because when the same page is opened in a browser, it's garbled in same fashion. Not an upstream problem.

Vivaldi 7.9 showing upstream page and Zeal conversion over-under

[trollixx]

The table headers use a t-vertical CSS class for rotation, and the HTML in the docset correctly has <div class="t-vertical">, but the CSS rule that defines the actual rotation is missing from all the bundled stylesheets. The upstream cppreference page defines it in an external stylesheet that the docset generator didn't carry over.

This should affect Dash too. @Kapeli mind taking a look?