body {
  margin: 0;
  font-family: Roboto, Arial, sans-serif;
  background: black;
  color: white;
}

button {
  font-family: Exo;
  font-weight: 700;
  font-size: 1.3rem;
  border: 2px solid hsl(0, 0%, 30%);
  border-radius: 1e10px;
  padding: .5rem 1rem;
  background: black;
  color: hsl(0, 0%, 95%);
  transition-duration: .15s;
}

button:hover:not(:disabled) {
  background: hsl(0, 0%, 10%);
}

button:active:not(:disabled) {
  transition-duration: initial;
  transform: scale3d(.975, .975, 1);
}

button:disabled {
  opacity: .5;
}

input {
  font-family: Exo;
  font-weight: 700;
  font-size: 1.3rem;
  border: 2px solid hsl(0, 0%, 30%);
  border-radius: 1e10px;
  padding: .5rem 1rem;
  background: black;
  color: hsl(0, 0%, 95%);
}