body{
    margin: 0;
    background-image: url("home1.jpg");
    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;
}

*{
  box-sizing: border-box;
  
}
.column{
  float: left;
  width: 25%;
  padding: 10px;
  height: 1300px;
  border-color: blue;
  border-style: solid;
  margin-left: 10px;
  margin-right: 2px;
}
.left, .right{
  width: 25%;
}
.middle{
  width: 48%;
}
.row::after{
  content: " ";
  display: table;
  clear: both;
}
a:hover{
    font-size: 40px;
}
img:hover{
  height: 300px;
}