.chat-open,.chat-open body{overscroll-behavior:none;overflow:hidden}.backdrop{overscroll-behavior:none}.chatbody{-webkit-overflow-scrolling:touch;overscroll-behavior-y:contain;touch-action:pan-y}.composer textarea{resize:none;min-width:0}@media (width<=600px){.chat-open .backdrop{top:var(--chat-viewport-top,0px);height:var(--chat-viewport-height,100dvh);align-items:stretch;bottom:auto}.chatmodal{height:var(--chat-viewport-height,100dvh);min-height:0}.composer{padding:9px 10px max(9px, env(safe-area-inset-bottom));touch-action:manipulation;grid-template-columns:46px 46px minmax(0,1fr) 48px;gap:8px}.composer>label.attach,.composer>label.camera,.composer .send{width:46px;height:50px}.composer textarea{height:50px;min-height:50px;max-height:132px;padding:13px 12px;font-size:16px;line-height:1.35;overflow-y:auto}}