h1 {color:#323284;
  text-align: center;
  font-size: 34px;
  } 
h2{color:#323284;
  font-size: 26px;
  }
h3 {color: #323284;
}
h4 {font-size: 24px;
}
p {font-size:18px;
  color:#00008B;
}
pre {font-size:16px;
}
body {
  background-color:white;
  font-family: "Arial Regular";
}
.header {
  padding: 25px;
  text-align: center;
  background: #000066;
  color: white;
  }

footer {text-align:center;
  font-size: 20px;
  padding:25px;
  background-color:#000066;
  color:white;
  }
nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  padding: 25px;
  font-weight: bold;
  background-color: #000066; 
  margin: 0;
}
nav a {
  margin: 20px 20px;
  text-decoration: bold;
  font-size: 18px;
  color: white;
}
.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
}
#email a{
	color: #00ff00;
 }
@media (min-width: 576px) {
  .card {
    max-width: 25%;} 
  }
  @media (min-width: 992px) {
  .card {
    max-width: 45%;}
}