Getting started with CSS (GSS) in GWT

ContactView.ui.xml

// src/main/java/com/company/project/client/application/contact/ContactView.ui.xml
 
<ui:UiBinder xmlns:ui='urn:ui:com.google.gwt.uibinder'>
 
    <ui:with field="resources" type="com.company.project.client.resources.AppResources"/>
    <ui:with field="pageResources" type="com.company.project.client.resources.PageResources"/>
 
    <div class="{pageResources.contact.contact}">
        <h1>My contact page!</h1>
 
        <p class="{resources.style.class_from_style_gss}">
            This is a beautiful contact form.
        </p>
 
        <p class="{pageResources.homepage.homepage_big_title}">
            Hey look, I can also use a class from the homepage, even though I should probably don't do this, right?
        </p>
 
        <form class="{pageResources.contact.contact_form}">
            <input type="email" placeholder="your email please" />
            <input type="submit" value="Go!" />
        </form>
    </div>
</ui:UiBinder>