.pwa-install-btn {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 1000;
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 17px;
  border: 1px solid rgba(255,176,32,.6);
  border-radius: 999px;
  background: #FFB020;
  color: #07080F;
  font: 700 14px/1 Manrope, Inter, system-ui, sans-serif;
  box-shadow: 0 16px 34px -14px rgba(255,176,32,.8);
  cursor: pointer;
}
.pwa-install-btn.is-visible { display: inline-flex; }
.pwa-install-btn:hover { background: #FFC860; transform: translateY(-2px); }
.pwa-install-btn:focus-visible { outline: 3px solid #00E5C0; outline-offset: 3px; }
.pwa-install-btn svg { width: 18px; height: 18px; }
.pwa-install-help {
  position: fixed;
  inset: 0;
  z-index: 1100;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(7,8,15,.78);
  backdrop-filter: blur(8px);
}
.pwa-install-help-card {
  position: relative;
  width: min(100%, 390px);
  padding: 28px;
  border: 1px solid rgba(255,176,32,.42);
  border-radius: 20px;
  background: #11131f;
  color: #f3f1ea;
  box-shadow: 0 24px 70px rgba(0,0,0,.45);
  text-align: center;
}
.pwa-install-help-card h2 { margin: 10px 0 8px; color: #f3f1ea; font-size: 1.45rem; }
.pwa-install-help-card p { margin: 0 0 22px; color: rgba(243,241,234,.76); line-height: 1.65; }
.pwa-install-help-icon { display: inline-grid; place-items: center; width: 48px; height: 48px; border-radius: 14px; background: #FFB020; color: #07080F; font-size: 27px; font-weight: 800; }
.pwa-install-help-close { position: absolute; top: 10px; right: 12px; width: 38px; height: 38px; border: 0; background: transparent; color: rgba(243,241,234,.72); font-size: 28px; cursor: pointer; }
.pwa-install-help-ok { min-height: 42px; padding: 9px 24px; border: 0; border-radius: 999px; background: #FFB020; color: #07080F; font: 700 14px/1 Manrope, Inter, system-ui, sans-serif; cursor: pointer; }
.pwa-install-help-close:focus-visible, .pwa-install-help-ok:focus-visible { outline: 3px solid #00E5C0; outline-offset: 3px; }
@media (max-width: 480px) {
  .pwa-install-btn { right: 12px; bottom: 12px; min-height: 42px; padding: 9px 14px; font-size: 13px; }
  .pwa-install-help-card { padding: 26px 20px 22px; }
}