gnoweb: broken CSS styles for italic text

[x1unix]

Missing default text style for italic text tags

Description

Gnoweb's markdown renderer uses <em> tag to render italic text.
The <em> tag by default has font-style: italic CSS rule.

The problem is that Gnoweb's stylesheet changes default browser styles, causing <em> tag to look like a regular text.

Problematic style declared in .realm-content em CSS selector (see screenshot below).

Your environment

• Go version: go1.23.4
• OS and CPU architecture: darwin/arm64
• Gno commit hash causing the issue: adaafd745113f0bfd27e56b1dfce0df4b5d74aff

Steps to reproduce

• Create a simple realm to print italic markdown text in Render() function.

func Render() string {
  // or "*sample text*"
  return "_sample text_"
}

Actual behaviour

Current behavior.

Expected behaviour

Italic text is actually italic.

Here I disabled problematic CSS style.

Logs

Please paste any logs here that demonstrate the issue, if they exist

Proposed solution

Fix or remove styles for .realm-content em selector.

[x1unix]

Probably already fixed by @alexiscolin