/* The shader stage (shaders.js): the photograph redrawn through an effect, exactly over the <img>.
   Invisible unless an effect is on; "Just the photograph" never shows it. */
#push>canvas.shader{position:absolute;inset:0;width:100%;height:100%;z-index:1;pointer-events:none;opacity:0;transition:opacity .35s}
#push>canvas.shader.on{opacity:1}
.clean-view #push>canvas.shader{opacity:0!important;transition:none}