/* ══════════════════════════════════════════════════════════════════════════ Room Creator "Modern Futuristic Glass" — the SHIPPED DEFAULT Room Creator design ══════════════════════════════════════════════════════════════════════════ Activation: DEFAULT. The synchronous script in lobby.html always sets ``, defaulting to `data-rc-proto="futuristic-glass-room-creator"` when no `?prototype=…` query param is present (or when the param IS `futuristic-glass-room-creator`, for explicit/backward-compatible links). `?prototype=royal-tactile` or `?prototype=steampunk-room-creator` switch to those two concepts instead, kept available for side-by-side comparison — mutually exclusive, exactly one active at a time. Scope: every rule below is prefixed with `html[data-rc-proto="futuristic-glass-room-creator"] #screen-join #create-options` (or a descendant of it), EXCEPT the small "outer-chrome takeover" block immediately below, which targets `#screen-join` itself (see its own comment for why that is still a narrowly-scoped, presentation-only change). Nothing in this file touches any other screen, modal, or shared component. Status: presentation-only prototype for design review, with real additions: Game Mode is a genuine cascade/disclosure popover over three REAL radios (#rc-game-mode-competitive/-tournament/-tutorial, markup in lobby.html) — not the inert decorative row the other two prototypes use, and not a native