.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 100%;  
}



h1 {
  text-align: center;
}



img {
  border: 2px solid #555;
}

body {
  background-color: white;
}

p1 {
  font-family: verdana;
  font-size: 20px;
}

p2 {
  font-family: times;
  font-size: 20px;
}


ol {
  font-family: calibri;
  font-size: 20px;
}


ul {
  font-family: calibri;
  font-size: 20px;
}


.responsive {
  max-width: 100%;
  height: auto;
}


body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

.topnav {
  overflow: hidden;
  background-color: #333;
}

.topnav a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.topnav a:hover {
  background-color: #ddd;
  color: black;
}

.topnav a.active {
  background-color: #04AA6D;
  color: white;
}