body{
    margin: 0;
    background-image: url("abt.jpeg");
    background-size: 2000px 1000px;
}
.topnav {
  overflow: hidden;
  background-color: #e9e9e9;
}
.topnav a {
  float: left;
  display: block;
  color: black;
  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: #2196F3;
  color: white;
}
.topnav .search-container {
  float: right;
}
.topnav input[type=text] {
  padding: 6px;
  margin-top: 8px;
  font-size: 17px;
  border: none;
}
.topnav .search-container button {
  float: right;
  padding: 6px 10px;
  margin-top: 8px;
  margin-right: 16px;
  background: #ddd;
  font-size: 17px;
  border: none;
  cursor: pointer;
}
.topnav .search-container button:hover {
  background: #ccc;
}
@media screen and (max-width: 600px) {
  .topnav .search-container {
    float: none;
  }
  .topnav a, .topnav input[type=text], .topnav .search-container button {
    float: none;
    display: block;
    text-align: left;
    width: 100%;
    margin: 0;
    padding: 14px;
  }
  .topnav input[type=text] {
    border: 1px solid #ccc;  
  }
}
.dropdown {
  float: left;
  overflow: hidden;
}
.dropdown .dropbtn {
  font-size: 17px;    
  border: none;
  outline: none;
  color: black;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}
.dropdown:hover .dropbtn {
  background-color: salmon;
}
.dropdown:hover .dropdown-content {
  display: block;
}
.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}
.dropdown-content a {
  float: none;
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}
.dropdown-content a:hover {
  background-color: #ddd;
}
.abc{
    height: 200px;
    width: 500px;
    padding: 10px;
    border-style: groove;
    border-color: brown;
    border-width: 3px;
    border-radius: 50px 2px;
    color: blue;
    /*margin: auto;*/
    margin-top: 70px;
    margin-left: 50px;
}
a {
    text-decoration: none;
    color: crimson;
    font-size: 35px;
}
a:hover {
    font-size: 50px;
    color: blue;
    background-color: lightpink;
}