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20px;padding:21px}}@media(max-width:1000px){.app-shell.sidebar-collapsed{grid-template-columns:1fr;gap:38px}.sidebar-collapsed .sidebar{opacity:1;pointer-events:auto;transform:none}.sidebar-toggle{display:none}}@media(max-width:760px){.chat-workspace.has-reader{grid-template-columns:1fr}.paper-reader{position:fixed;z-index:75;inset:12px;max-height:calc(100dvh - 24px);border-radius:22px;box-shadow:18px 20px 48px #483b6c3d,-8px -8px 22px #ffffffe0}.reader-meta-row{align-items:stretch;flex-direction:column}.reader-meta-row .reader-meta{margin-bottom:0}.reader-document-actions{overflow-x:auto;padding-bottom:2px}}@media(max-width:680px){.chat-heading-top{align-items:stretch;flex-direction:column}.chat-evidence-badge{align-self:flex-start;margin:5px 0 0}.chat-heading-actions{position:static;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px;white-space:normal}.chat-heading-actions .history-delete-button,.chat-heading-actions .room-delete-button,.chat-heading-actions 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