.auth-backdrop{z-index:0;pointer-events:none;position:fixed;inset:0;overflow:hidden}.auth-sphere{opacity:0;transition:opacity 1.1s,transform 1.6s cubic-bezier(.16,1,.3,1);position:absolute;inset:0;transform:scale(.94)}.auth-sphere.is-visible{opacity:1;transform:scale(1)}.auth-backdrop-canvas{width:100%;height:100%;display:block;position:absolute;inset:0}@media (prefers-reduced-motion:reduce){.auth-sphere{transition:none;animation:none}}