/* Opaque teaching surfaces keep their glass edges without recomputing a blurred
   background every time a word, option, score or countdown changes. */
.app-shell.is-playing .verified-question,.app-shell.is-playing .mini-tracker,
.app-shell.is-playing .vocab-mini-tracker,.app-shell.is-playing .vocab-board,
.app-shell.is-playing .app-header,.app-shell.is-playing .game-header-count,
.app-shell.is-playing .xp-balance{backdrop-filter:none!important;-webkit-backdrop-filter:none!important}
.app-shell.is-playing .verified-question,.app-shell.is-playing .vocab-board{contain:layout style}
.app-shell .scene-has-film,.app-shell .home-path,.app-shell .daily-card,
.app-shell .home-sticker,.app-shell .vocab-level-map{backdrop-filter:none!important;-webkit-backdrop-filter:none!important}
.app-shell:not(.is-playing) .glass-sidebar,.app-shell:not(.is-playing) .app-header{backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}