.install-app-btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:9px 13px;border:0;border-radius:12px;background:linear-gradient(110deg,#1769d2,#18a8c4);color:#fff;font:800 12px "Plus Jakarta Sans","Hind Siliguri",sans-serif;box-shadow:0 7px 18px rgba(23,105,210,.18);cursor:pointer;white-space:nowrap}
.install-app-btn[hidden]{display:none!important}
.install-help{position:fixed;inset:0;z-index:9999;display:none;place-items:center;padding:20px;background:rgba(5,20,45,.62)}
.install-help.open{display:grid}
.install-help-card{width:min(100%,390px);padding:24px;border-radius:22px;background:#fff;color:#17385f;box-shadow:0 25px 80px rgba(0,0,0,.25)}
.install-help-card h2{margin:0 0 10px;font:800 22px "Hind Siliguri",sans-serif}
.install-help-card p{color:#667b95;line-height:1.65;font-size:14px}
.install-help-card button{border:0;border-radius:11px;background:#1769d2;color:#fff;padding:11px 18px;font-weight:800}
@media(max-width:640px){.top nav .install-app-btn{flex:none;padding:8px 10px;font-size:11px}}