#StillActiveAlert {
  display: block;
  position: absolute;
  top: 50%;
  left: 50%;
  width: 300px;
  height: 150px;
  padding: 1em 2em 1em 2em;
  background: #e9e9e9;
  border: 1px solid #000;
  text-align: center;
  color: #000;
  margin-left: -175px;
}

#StillActiveAlert p {
  margin: 1em auto 1em auto;
  font-weight: bold;
  color: #f00;
  text-align: center;
}