UI/Story/FadeFromBlack.razor
@using Sandbox;
@using Sandbox.UI;
@inherits PanelComponent

<root>
	<div class="screen" />
</root>

@code
{
    TimeSince timeSinceCreated = 0;

    protected override void OnUpdate()
    {
        SetClass( "hide", timeSinceCreated > 0.5f );
    }
}