style.css

:root {
  --page-1-color: steelblue;
  --page-2-color: tan;
  --page-3-color: teal;
  --page-4-color: slateblue;
  --animation-speed: 1s;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

#page-1 { background-color: var(--page-1-color);}
#page-2 { background-color: var(--page-2-color);}
#page-3 { background-color: var(--page-3-color);}
#page-4 { background-color: var(--page-4-color);}

.page {
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  font-family: Arial, Helvetica, sans-serif;
  padding: 4rem;
}

.page h1 {
  font-size: 4rem;
  margin-bottom: 2rem;
}

.page p {
  font-size: 1.4rem;
  line-height: 1.8rem;
  margin-bottom: 2rem;
}

.btn {
  display: inline-block;
  color: #333;
  background-color: #f4f4f4;
  font-size: 1.2rem;
  padding: 13px 20px;
  transition: all 0.3s ease-in;
}

.btn:hover, .btn-dark {
  background-color: #333;
  color: #fff;
}

.btn-dark:hover {
  color: #333;
  background-color: #fff;
}

#page-1 h1 {
  transform: translateY(-1200px);
  animation: heading var(--animation-speed) forwards ease-in;
}

#page-1 p {
  transform: translateX(-1800px);
  animation: text var(--animation-speed) forwards ease-in 1s;
}


@keyframes heading {
  to {
    transform: translateY(0px);
  }
}

@keyframes text {
  to {
    transform: translateX(0px);
  }
}