body {
  margin: 0;
  font-family: 'Courier New', monospace;
  background: black;
  color: white;
  padding: 20px;
}

h1.logo {
  font-size: 2.5rem;
  color: cyan;
  text-shadow: 0 0 10px cyan;
  text-align: center;
}

.glow {
  color: magenta;
  text-shadow: 0 0 5px magenta;
}

section {
  margin-top: 20px;
  padding: 10px;
}

input, button {
  background: #111;
  color: white;
  border: 1px solid cyan;
  margin: 5px 0;
  padding: 10px;
  width: 100%;
  max-width: 300px;
  display: block;
}

.alert {
  color: red;
  font-size: 2rem;
  text-shadow: 0 0 20px red;
  text-align: center;
}

.encrypted {
  font-family: monospace;
  color: limegreen;
  font-size: 1.2rem;
  text-align: center;
  margin-top: 20px;
}

.hidden {
  display: none;
}

@media screen and (max-width: 600px) {
  body {
    padding: 10px;
  }

  h1.logo {
    font-size: 2rem;
  }

  .alert {
    font-size: 1.5rem;
  }

  .encrypted {
    font-size: 1rem;
  }
}