body {
  margin: 0;
  padding: 0;
  font-family: Arial, Helvetica, sans-serif;
}
* {
  box-sizing: border-box;
}

.center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 20px;
  border-radius: 8px;
  color: white;
  background-color: #242424;
  box-shadow: 0 0 20px 10px rgba(0, 0, 0, 0.2);
  font-size: 1.2rem;
}

input {
  border: 1px solid white;
  margin-bottom: 10px;
  background-color: transparent;
  color: white;
  border-radius: 8px;
  padding: 5px 10px;
  font-size: inherit;
}

input[type="submit"] {
  font-size: inherit;
  font-weight: bold;
  cursor: pointer;
  background-color: white;
  color: #242424;
}