@import: no-invalid-css

[wencan]

lit-plugin: v1.4.3

Here is the code that can execute normally.

import {html, LitElement} from'https://gcore.jsdelivr.net/gh/lit/dist@3/core/lit-core.min.js';

export class Navbar extends LitElement {
    render() {
        return html`
<style>
    @import url('https://cdn.bootcdn.net/ajax/libs/bulma/1.0.2/css/bulma.min.css');
</style>

<nav class="navbar" role="navigation" aria-label="main navigation">
  <div class="navbar-brand">
    <a class="navbar-item" href="/">
        <img width="30" src="/images/logo.png" alt="XXX Logo">
        <h1 class="title">XXX</h1>
    </a>
  </div>
</nav>
        `
    }
}
customElements.define('nav-bar', Navbar)

lit-plugin report: { expected lit-plugin(no-invalid-css)