#rar-install-help {
  width:min(440px,calc(100vw - 32px)); max-height:calc(100dvh - 40px); overflow:auto;
  padding:24px; border:1px solid var(--linha); border-radius:16px; background:var(--branco);
  color:var(--tinta); box-shadow:0 20px 70px #3b2f2a40;
}
#rar-install-help::backdrop { background:#3b2f2a80; }
#rar-install-help h2 { margin:0; }
#rar-install-help ol { padding-left:20px; }
#rar-install-help li { margin:8px 0; }
#rar-install-help .ki-platform,#rar-install-help .ki-note { color:var(--suave); font-size:.85em; }
#rar-install-help .ki-close {
  display:block; margin:16px 0 0 auto; padding:8px 14px; border:0; border-radius:8px;
  background:var(--rosa-escuro); color:#fff; font:inherit; cursor:pointer;
}