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720px){.stat-grid{grid-template-columns:1fr}.messages-page{flex-direction:column;margin:-20px}.conversation-list{width:100%;border-right:none;border-bottom:1px solid var(--border)}.messages-page.thread-open .conversation-list{display:none}.messages-page:not(.thread-open) .chat-thread{display:none}.chat-back-btn{display:inline-block}.modal,.modal-wide{width:calc(100vw - 32px);max-width:480px}.inline-fields{flex-direction:column}}