/* Stationary painting boundaries for the Architecture picture.
   The authored contour, light colours, animation and timing remain in charge. */
#p3 .master-screen > .golden-box {
  overflow:clip !important;
  contain:paint;
  isolation:isolate;
}

/* Catch the blur, reflected light and animated shadows after the individual
   ring layers have been drawn, before they reach the picture's outer frame. */
#p3 .master-screen > .golden-box > .section-screen-slide {
  contain:paint;
  isolation:isolate;
}

/* The phone receiver has a separate picture seat around the live source.
   Keep that final surface clipped in both upright and sideways views. */
body.master-stories .clean-picture-aperture {
  overflow:clip;
  contain:paint;
  isolation:isolate;
}