p{
color:red;
font-size: 16px;
 font-family: Arial, Helvetica, sans-serif;
}
.p1{
color:green;
font-family: Arial, Helvetica, sans-serif;
/*line-height: 0;*/
}
body {
    display: block;
    margin: 0px;
    margin-top: 10px;
    margin-right: 40px;
    margin-bottom: 30px;
    margin-left: 30px;
}
h1{
text-align: center;
color:blue;
}
h5{
margin-left: 30px;
}
img{
height:250;
 max-width: 100%;
display:inline- block;
}
.im1{
height:230;
 max-width: 400%;
} 

.img2{
height:250;
 max-width: 300%;
}
/*.button{
 padding: 15px 32px;
text-align: center;
  position: relative;
display: inline-block;
 top:45%;
}*/
.topnav {
  overflow: hidden;
  background-color: #333;
}

.topnav a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 20px;
}

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

.topnav a.active {
  background-color: #04AA6D;
  color: white;
}    
body {
  border-right: 4px dotted blue;
border-left: 4px dotted blue;
border-bottom: 4px dotted blue;
}
.center
{
  display: block;
  margin-top: auto;
 margin-right: auto; 
  margin-left: auto;
width: 70%; 
height:70%;
}
.column {
  margin-left: 40px;
margin-top: 5px;
  width: 33.33%;
  padding: 10px;
}

.row::after {
  content: "";
  clear: both;
  display: table;
}