#body {
  background-color: #05082e;
  color: #0ff;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  text-align: center;
  padding: 50px;
  margin: 0;
}


#content {
  font-size: 2em;
  margin-top: 50px;
/*  text-shadow: 0 0 8px #0ff;*/
}

#btnToggle {
  position: fixed;
  top: 20px;
  right: 20px;
  background: none;
  border: 1px solid #0ff;
  color: #0ff;
  padding: 10px 25px;
  border-radius: 20px;
  cursor: pointer;
  font-weight: bold;
  font-size: 1.1rem;
  /*text-shadow: 0 0 6px #0ff;*/
  transition: background-color 0.3s ease, color 0.3s ease;
}

#btnToggle:hover {
  background-color: #0ff;
  color: #05082e;
}