html {
  font-family: sans-serif;
}

body {
  margin: 0;
}

button {
  font: inherit;
  background: #5102ac;
  border: 1px solid #5102ac;
  color: white;
  cursor: pointer;
  padding: 1.25rem 2.5rem;
  font-size: 1.5rem;
}

button:focus {
  outline: none;
}

button:hover,
button:active {
  background: #832ee4;
  border-color: #832ee4;
}

#control-center {
  border: 2px solid #ccc;
  margin: 5rem;
  padding: 2rem;
}