UI/Story/BlackOverlay.razor
@using Sandbox;
@using Sandbox.UI;

@namespace Opium
@inherits PanelComponent

<root>
</root>

@code
{
    public static bool IsOverlayEnabled { get; set; }

    protected override void OnTreeFirstBuilt()
    {
        base.OnTreeFirstBuilt();

        IsOverlayEnabled = false;
        BindClass("show", () => IsOverlayEnabled);
    }
}