Describe the bug
The following HTML does not result in a green background div. Only the bottom border is applied.
<html><head>
<style>
.alert {
--bg: #d1e7dd;
background-color: var(--bg);
border-bottom: 1px solid black;
}
</style>
</head><body>
<div class='alert'>
This box should be green (if VAR works) with a border bottom (if css applied).
</div></body></html>
To Reproduce
var document = new Document("index.hml");
document.Save("out.pdf", SaveFormat.Pdf);
Expected behavior
The box should be green with a border bottom.
Screenshots
Using Var():

Setting the background color without Var():

Desktop (please complete the following information):
- OS: Windows
- Version: Aspose.PDF v24.6.0