h3 {
text-align: center;
}
Td {
text-align: center;
}


p {
    
    margin: 5px;
}

.footer {
    
    bottom: 0;
    padding: 1em;
    color: white;
    background-color: black;
    clear: left;
    text-align: center;
}
img {
    width: 100%;
    height: 160px;

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

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

.topnav a:hover {
     color: #CC6600;
      text-decoration: none
}

.topnav a.active {
  background-color: #4CAF50;
  color: white;
}
body{
  background-color:#FF9933;
  font-size: 16px;
  font-family:Arial;
  padding: 2mm;
text-align: center;
margin: 5px;
}

div.gallery {
    border: 1px solid #ccc;
}

div.gallery:hover {
    border: 1px solid #777;
}

div.gallery img {
    width: 100%;
    height: auto;
}

div.desc {
    padding: 15px;
    text-align: center;
}

* {
    box-sizing: border-box;
}

.responsive {
    padding: 0 6px;
    float: left;
    width: 24.99999%;
}

@media only screen and (max-width: 700px){
    .responsive {
        width: 49.99999%;
        margin: 6px 0;
    }

}
@media only screen and (max-width: 500px){

    .responsive {
        width: 100%;
    }
}
.clearfix:after {
    content: "";
    display: table;
    clear: both;
}