/* PWA install button - v20.3 */
.pwa-install-btn{position:fixed;right:18px;bottom:18px;z-index:9999;border:0;border-radius:999px;background:#2563eb;color:#fff;padding:12px 16px;font-weight:800;box-shadow:0 16px 40px rgba(37,99,235,.35);cursor:pointer;display:none;align-items:center;gap:8px;font-size:14px;letter-spacing:.01em}.pwa-install-btn:hover{filter:brightness(1.06);transform:translateY(-1px)}.pwa-install-btn.show{display:inline-flex}.pwa-install-tip{position:fixed;right:18px;bottom:74px;z-index:9998;max-width:280px;background:#0f172a;color:#e5e7eb;border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:12px 14px;font-size:13px;line-height:1.35;box-shadow:0 18px 50px rgba(0,0,0,.35);display:none}.pwa-install-tip.show{display:block}@media(max-width:640px){.pwa-install-btn{right:12px;bottom:12px;padding:10px 13px;font-size:13px}.pwa-install-tip{right:12px;left:12px;bottom:62px;max-width:none}}