body {
    background-image: radial-gradient(rgb(224, 224, 224), rgb(127, 200, 224));
    background-size: cover;
    background-position: 40% 10%;

}

header {
    text-align: center;
    font-family: Verdana;
    background-color: cadetblue;
    padding: 1em;
    color: white;
    
}

header > h1 {
    font-size: 45px;
}


header > p {
    font-size: 25px;
}

article > h2 {
    text-align: center;
    color: rgb(87, 87, 87)
}

nav{
    font-size: 20pt;
}

img {
    border: 4px solid cadetblue;
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 50%;
    
}

a {
    text-decoration: none;
    display: inline-block;
    padding: 8px 16px;
  }
  
  a:hover {
    background-color: #ddd;
    color: black;
  }
  
  .previous {
    background-color: #f1f1f1;
    color: black;
    display: block;
    margin-left: 10em;
    margin-right: auto;
    margin-bottom: auto;
 ;
    width: 4%;
  }
  
  .next {
    background-color: #4CAF50;
    color: white;
    display: block;
    margin-left: auto;
    margin-right: 10em;
    margin-bottom: auto;
    width: 3%;
    
  }