#pwa-install-button {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 2147483000;
    border: 0;
    border-radius: 10px;
    background: #163a63;
    color: #fff;
    font: 600 14px/1.2 Arial, sans-serif;
    padding: 11px 16px;
    box-shadow: 0 8px 24px rgba(0,0,0,.22);
    cursor: pointer;
}
#pwa-install-button:hover,
#pwa-install-button:focus {
    background: #0f2e50;
    outline: 3px solid rgba(65,215,255,.35);
    outline-offset: 2px;
}
#pwa-install-button[hidden] { display: none !important; }
#pwa-install-button .pwa-install-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    margin-right: 8px;
    border-radius: 50%;
    background: #41d7ff;
    vertical-align: 1px;
}
@media (max-width: 640px) {
    #pwa-install-button { right: 14px; bottom: 14px; padding: 10px 14px; }
}