html {
  color: #fff;
  background-color: #000;
  text-align: center;
}

.param-container {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}

button {
  color: #fff;
  background-color: #000;
  border: 2px solid #666;
  height: 50px;
  width: clamp(100px, 20%, 300px);
}

button:hover {
  color: #000;
  background-color: #aaa;
  cursor: pointer;
}