body{
    margin: 0;
    background-image: url("learn1.jpg");
    background-repeat: no-repeat;
    background-size: 1950px 970px;
    overflow: hidden;
}
ul{
    list-style-type: none;
    margin: 0;
    padding: 0;
    width: 140px;
    background-color: #BE3144;
    position: fixed;
    height: 100%;
    overflow: auto;
}
li a{
    display: block;
    color: white;
    padding: 25px 16px;
    text-decoration: none;
}
li a.active{
    background-color: #F14A00;
    color: black;
}
li a:hover:not(.active){
    background-color: #E19898;
    color: rgb(177, 12, 12);
}
.topnav .search-container{
    float: left;
    margin-left: 750px;
}
.topnav input[type=text]{
    padding: 6px;
    margin-top: 50px;
    margin-right: 0px;
    font-size: 17px;
    border-style: dashed;
    border-color: green;
}

.topnav .search-container button {
  padding: 6px 10px;
  margin-top: 10px;
  margin-right: 20px;
  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;  
  }
}
.one{
  margin: auto;
  height: 50px;
  width: 500px;
  padding: 20px;
  border-style: double;
  border-color: #001a00;
  color: #F5EFE6;
  border-radius: 5px 100px;
  border-width: 5px;
  font-size: 28px;
  text-align: center;
}