:root{ --vh:100dvh; }
html,body{ height:100%; background:#071426; }
body{ color:#e6e9f0; overscroll-behavior-y:contain; }
main.thread{ min-height:var(--vh); background:transparent; }
footer.input{ position:sticky; bottom:0; }
@supports(padding:env(safe-area-inset-bottom)){
  footer.input .box{ padding-bottom:calc(8px + env(safe-area-inset-bottom)); }
}