#modalContainer {
  position: fixed; /* changed from absolute */
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5); /* added overlay */
  z-index: 10000;
}

#alertBox {
  position: fixed; /* changed from relative */
  width: 350px; /* changed size */
  padding: 20px; /* added spacing */
  border: 3px solid #4CAF50; /* changed border */
  border-radius: 10px; /* added rounded corners */
  background-color: #FFFFFF; /* changed background */
  box-shadow: 0 8px 20px rgba(0,0,0,0.3); /* added shadow */

  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%); /* added centering */
}

#alertBox h1 {
  margin: 0 0 10px 0;
  font-family: Georgia, "Times New Roman", serif; /* changed font */
  font-size: 1.4em;
  font-weight: bold;
  color: #2E7D32; /* changed color */
}

#alertBox p {
  font-family: Verdana, Arial, sans-serif;
  font-size: 1em;
  margin: 10px 0 20px 0;
  color: #333333;
  text-align: center; /* centered response text */
}

#closeBtn {
  display: block;
  margin: 0 auto;
  padding: 8px 12px;
  width: 80px;
  font-family: Verdana, Arial, sans-serif;
  color: #FFFFFF;
  background-color: #4CAF50; /* changed color */
  border: 2px solid #2E7D32;
  border-radius: 5px;
  text-decoration: none;
  text-align: center;
}

#closeBtn:hover {
  background-color: #45a049;
}