.install-app-button{position:fixed;right:16px;bottom:calc(84px + env(safe-area-inset-bottom));z-index:110;background:#008dda;color:white;border:1px solid #ffffff50;border-radius:24px;padding:11px 18px;font:600 15px system-ui;box-shadow:0 3px 14px #0003;cursor:pointer}
.install-app-dialog{max-width:480px;width:calc(100% - 40px);border:0;border-radius:18px;padding:26px;color:#12253d;font:16px/1.6 system-ui;background:#fff}
.install-app-dialog::backdrop{background:#07182abf}.install-app-dialog h2{font-size:24px;margin:0 0 14px}.install-app-dialog button{background:#008dda;color:white;border:0;border-radius:8px;padding:10px 24px;font:600 16px system-ui;cursor:pointer}
@media(min-width:900px){.install-app-button{bottom:24px}}