#installStar {
  position: absolute;
  top: 3px;
  right: 6px;
  width: 19px;   /* taille petite */
  height: 19px;
  cursor: pointer;
  z-index: 50;
  opacity: 0.85;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

#installStar:hover {
  transform: scale(1.1);
  opacity: 1;
}

.installPulse {
  animation: starBlink 1.2s ease-in-out infinite;
}

@keyframes starBlink {

  0% {
    transform: scale(1);
    opacity: 1;
  }

  50% {
    transform: scale(1.35);
    opacity: 0.6;
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }

}

#installPopupOverlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(3px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
}

#installPopup {
  background: #08345B;
  color: white;
  width: 80%;
  max-width: 520px;
  border-radius: 14px;
  padding: 20px 22px;
  box-shadow: 0 10px 35px rgba(0,0,0,0.4);
  position: relative;
  animation: popupFadeIn 0.18s ease;
}

#installPopup h3 {
  margin-top: 0;
  font-size: 18px;
}

#installPopup ol {
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.5;
}

#closePopupinstall {
  position: absolute;
  top: 3px;
  right: 3px;
  background: none;
  border: none;
  color: #FFFFFF;
  font-family: verdana;
  font-weight: bold;
  font-size: 20px;
  cursor: pointer;
}

#closePopupinstall:hover {
  color: white;
}

@keyframes popupFadeIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

<!-- Optionnel : CSS supplémentaire pour mobile -->
  @media (max-width: 400px) {
    #installPopup {
      padding:12px 15px;
      font-size:13px;
    }
    #installPopup h2 {
      font-size:16px;
    }
    #installPopup ol {
      font-size:13px;
    }
    #installPopup p {
      font-size:11px;
    }
    #installPopup img {
      width:25px;
    }
  }