.install-app-control{position:fixed;bottom:18px;left:18px;z-index:45;border-radius:14px;border:1px solid #7468bd;background:#493c87;color:white;font:600 13px system-ui;padding:12px 16px;cursor:pointer;box-shadow:0 6px 24px #0003}.install-help{width:min(520px,92vw);max-height:85vh;overflow:auto;border:1px solid #63739d;border-radius:22px;padding:28px;background:#152039;color:#eff3ff;font:16px/1.7 system-ui}.install-help::backdrop{background:#050b19bc}.install-help h2{font-size:25px}.install-help button{background:#7652d4;color:white;border:0;border-radius:12px;padding:12px 18px;cursor:pointer}.install-help [hidden]{display:none!important}@media(max-width:800px){.install-app-control{bottom:14px;left:12px;padding:9px 12px;font-size:12px}}