body {
font-family: Arial, Helvetica, sans-serif;Background-color: black;
color: cornsilk;
margin-left: 20%;
margin-right: 20%;
margin-top: 10%;
text-align: center;
}

ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
  }
  
  li {
    float: left;
  }
  
a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
  }
  
  /* Change the link color to #111 (black) on hover */
a:hover {
    background-color: rgb(83, 83, 74);
      }



button {
   border-radius: 10pc;
    background-color: green;
    color: white;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 20px;
    margin: 4px 2px;
    cursor: pointer;

 }