/* PWA Install Banner & Mobile App UI */
#pwa-install-banner {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 450px;
    z-index: 9999;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    border-radius: 12px;
}