body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #f4f4f4;
}

.container {
  text-align: center;
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  min-width: 450px
}

#generate-otp-button {
  margin-top: 1em;
  padding: 10px 20px;
  border: none;
  background: gray;
  color: white;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s ease;
  font-size: 1rem
}

#generate-otp-button:hover {
  background: black;
}

#generate-otp-button:disabled {
  background: lightgray;
  cursor: not-allowed;
}