body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  text-align: center;
  background: linear-gradient(to right, #f00, #ff0);
  transition: 0.5s ease;
}

h1 {
  margin-top: 20px;
}

input {
  margin: 10px;
  border: none;
  height: 40px;
  width: 100px;
}

h2,
h3 {
  margin: 20px;
}

button {
  width: 250px;
  height: 40px;
  background: #eeeff1;
  color: rgb(16, 16, 16);
  border: none;
  border-radius: 0.6em;
  cursor: pointer;
  font-size: large;
  font-weight: 500;
  margin-top: 1rem;
  transition: 0.5s, color 0.5s, transform 0.5s;
}

button:hover {
  background: #8ce0ea;
  color: #eeeff1;
  transform: scale(1.1);
}

@keyframes button-press {
  0% { transform: scale(1); }
  50% { transform: scale(0.9); }
  100% { transform: scale(1); }
}

button:active {
  animation: button-press 0.2s;
}