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minmax(0,1fr)}.detailsPanel{display:none}}@media(max-width:720px){.appShell{grid-template-columns:1fr}.sidebar{display:none}.chatHeader{grid-template-columns:minmax(0,1fr) auto auto auto}.callToolbar{gap:2px}.chatWindow{grid-template-rows:64px minmax(0,1fr) auto}.messageList{padding:16px 12px}.messageStack{max-width:82%}.roomEntryShell{grid-template-columns:1fr}.roomListPanel{border-left:0;border-top:1px solid #d9dee4}.entryGrid{grid-template-columns:1fr}.stickerGrid{grid-template-columns:repeat(4,minmax(58px,1fr))}}