/* One subtle invitation per tab, without labels or layout movement. */
@media(prefers-reduced-motion:no-preference){
 .site-header #theme-toggle.icon-invite::before,.site-header #ambient-toggle.icon-invite::before{animation:nav-ring-invite 1.5s ease-in-out 1}
 .site-header #theme-toggle.icon-invite svg,.site-header #ambient-toggle.icon-invite svg{animation:nav-icon-invite 1.5s ease-in-out 1}
}
@keyframes nav-ring-invite{0%,100%{box-shadow:0 0 0 0 transparent}40%{box-shadow:0 0 0 4px #b695ff26,0 0 15px #b695ff70;opacity:.85}}
@keyframes nav-icon-invite{0%,100%{transform:scale(1)}40%{transform:scale(1.13)}}