Effects

Play the portal

Choose a presentation tier and explicitly play an opening or closing. The example is decorative; its window and button remain in place.

Ready. No effect plays until activated.

Full, reduced and off

Full uses 520ms opening and 360ms closing. Reduced uses only decorative frame opacity for 120ms opening and 90ms closing, without sparks or movement. Off settles immediately. Reduced motion also settles immediately.

Timeline

Opening: ignite 0–120ms, expand 120–380ms, resolve 380–460ms, settle 460–520ms. Closing: release 0–90ms, contract 90–270ms, extinguish 270–360ms.

Prototype study frames

The following unmodified frames document an earlier visual study. They are not evidence of final native integration.

Resource limits

At most one portal runs at a time and at most one full portal starts per rolling second. Additional windows settle without a queue. Decorative coverage stays below 5% of the viewport, with bounded bloom and no repeated flashes. Hidden documents and interruptions settle immediately.

Access and native presentation

The live input plane and sharp focus cues stay at final geometry; decoration is pointer-inert and hidden from accessibility APIs. Native client content requires a guarded compositor or host presentation path: ordinary CSS cannot safely animate an arbitrary native client frame. Enter the desktop.