#shell{height:100dvh;min-height:100dvh;padding-bottom:0;overflow:hidden}
.screen:not(.chat-screen){height:calc(100dvh - 144px - env(safe-area-inset-bottom));overflow-y:auto;padding-bottom:36px;overscroll-behavior:contain}
.bottom-nav{position:absolute;bottom:0}
.chat-screen{top:73px;bottom:0;height:auto;overflow:hidden}
.chat-screen .messages{min-height:0}