div#sto_prompt
{
  display: none;
  position: fixed;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
  background-color: lightgray;
  padding: 20px;
  text-align: center;
  font-size: 1.4rem;
  color: #841B2D;
  font-variant: small-caps;
  letter-spacing: 1px;
  left: 50%;
  top: 40%;
  transform: translate(-50%, -50%);
  border: 1px solid black;
  border-radius: 8px;
  box-shadow: 4px 4px 40px -12px rgba(100,100,100,1);
  z-index: 100;
}

div#sto_prompt > input
{
  min-width: 150px;
  margin: 16px 0;
  padding: 6px 20px 8px 20px;
  font-size: 1.2rem;
  font-variant: small-caps;
  letter-spacing: 2px;
}