.bos-install-overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:9998;display:none;align-items:flex-end;justify-content:center}
.bos-install-overlay.bos-visible{display:flex}
@media (min-width:640px){.bos-install-overlay{align-items:center}}
.bos-install-card{background:#fff;width:100%;max-width:420px;border-radius:16px 16px 0 0;padding:24px 20px 20px;box-shadow:0 -4px 24px rgba(0,0,0,.2);z-index:9999;animation:bos-slide-up .25s ease-out;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;position:relative}
@media (min-width:640px){.bos-install-card{border-radius:16px;box-shadow:0 12px 40px rgba(0,0,0,.25)}}
@keyframes bos-slide-up{from{transform:translateY(24px);opacity:0}to{transform:translateY(0);opacity:1}}
.bos-install-header{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.bos-install-icon{width:48px;height:48px;border-radius:12px;flex-shrink:0}
.bos-install-title{font-size:16px;font-weight:600;margin:0;color:#1a1a1a}
.bos-install-subtitle{font-size:13.5px;color:#666;margin:2px 0 0}
.bos-install-body{font-size:14px;color:#444;line-height:1.45;margin-bottom:18px}
.bos-install-steps{margin:10px 0 0;padding-left:20px}
.bos-install-steps li{margin-bottom:4px}
.bos-install-actions{display:flex;gap:10px}
.bos-install-btn-primary{flex:1;background:#dc2626;color:#fff;border:none;border-radius:10px;padding:12px 16px;font-size:14.5px;font-weight:600;cursor:pointer}
.bos-install-btn-secondary{background:transparent;color:#888;border:none;padding:12px 14px;font-size:14px;cursor:pointer}
.bos-install-close{position:absolute;top:12px;right:14px;border:none;background:none;font-size:18px;color:#999;cursor:pointer;line-height:1}