#installPopup {
    position: fixed;
    bottom: 20px;
    left: 20px;
    right: 20px;
    max-width: 360px;
    margin: auto;
    background: #181818;
    color: #fff;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    display: none;
    padding: 20px;
    z-index: 9999;
    text-align: center;
    animation: slideUp 0.4s ease;
  }

  #installPopup img {
    width: 80px;
    height: 80px;
    margin-bottom: 10px;
  }

  #installPopup button {
    background: #1db954;
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    margin-top: 8px;
  }

  #installPopup button:hover {
    background: #17a74b;
  }

  @keyframes slideUp {
    from { transform: translateY(100%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
  }