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

}

body {
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.4;
    color: #fff;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

#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 {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 100vh;
  padding: 0 4rem;
}

.page h1 {
    font-size: 4rem;
    line-height: 1.2;
    margin: 1rem;
}

.page p {
    font-size: 1.3rem;
}

.page .btn {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: #f4f4f4;
    color: #333;
    text-decoration: none;
    border: none;
    font-size: 1.1rem;
    margin-top: 1rem;
    transition: 0.3s all ease-in-out;
}

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

.page .btn-dark:hover {
    background-color: #f4f4f4;
    color: #333;
}

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

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

#page-1 p {
    transform: translateX(-1800px);
    animation: paragraf var(--animate-speed) forwards ease-in 1s;
}
@keyframes paragraf {
    to {
        transform: translateX(0);
    }
}