Glass (default) renders surfaces and floating overlays as frosted liquid glass. Flat removes the glass chrome.

Specular rim glare on capsules & menu selectors (Glass style). 0 = off.

Background fill of frosted windows, sheets, modals & menus (Glass style). Higher = more opaque / less see-through. 180 = default (slider midpoint).

Size of the top-leading sidebar wordmark. Scales from the leading edge. 85 = default.

Opacity of the 1px outline around incoming message bubbles (all four edges). 0 = fully transparent, 20 = baseline. Liquid/Glass only.

Space between message text and the top/bottom edge of the bubble. 7 = Flat baseline (Liquid/Glass baseline is 10).

Space between message text and the left/right edge of the bubble. 12 = Flat baseline (Liquid/Glass baseline is 14).

Renders the Logo overlay through Three.js with a real UnrealBloomPass instead of model-viewer's tone-mapped fake bloom. Off by default.

Uniform 14px grows body text site-wide and matches Help/Merch/Media to it.

Scales the accent's saturation from 0 (gray) to 100 (vivid). Affects every blue surface — buttons, focus rings, the iMessage-style Me bubble.

Test the stroke weight & size of the onboarding nav arrow (shown pointing up). Weight = SVG stroke-width, size = icon px. Dial in values, then report them to implement the real button later.