Modrinth: Placeholder Text Unthemed

### Is there an existing issue outlining your problem?

- [x] I have searched the existing issues and they do not solve my problem.

### What userstyle are you seeing the problem on?

lbl:modrinth

### Description

The placeholder text is unthemed

### Relevant screenshots

### Browser version(s) this issue occurs on

Zen v1.19.9b

### Stylus extension version

Stylus 2.3.19

### Installed version of the userstyle

v2026.04.13

### Any additional comments?

Themed by this:
```css
.ͼ1 .cm-placeholder {
color: #888;
display: inline-block;
vertical-align: top;
user-select: none;
}
```

Open the lbl:modrinth userstyle and inspect the shown .cm-placeholder rule, starting with how nearby text colors are themed. Verify the placeholder in Modrinth with Stylus; done means its text color matches the userstyle theme instead of remaining unthemed.

Written by the indexing model from the issue text.