<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Search Box</title>
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.2/css/all.css" integrity="sha384-fnmOCqbTlWIlj8LyTjo7mOUStjsKC4pOpQbqyi7RrhN7udi9RwhKkMHpvLbHG9Sr" crossorigin="anonymous">
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="search-box">
<input type="text" class="search-txt" placeholder="Search...">
<a href="#" class="search-btn">
<i class="fas fa-search"></i>
</a>
</div>
</body>
</html>
body{
margin: 0;
padding: 0;
box-sizing: border-box;
background: #231123
}
.search-box{
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%,-50%);
background: #82204A;
height: 40px;
border-radius: 40px;
padding: 10px;
}
.search-box:hover> .search-txt{
width: 240px;
padding: 0 6px;
}
.search-box:hover> .search-btn{
background-color: #CAD2C5;
color: #231123
}
a.search-btn{
color: #EFF7FF;
width: 40px;
height: 40px;
float: right;
border-radius: 50%;
background: #82204A;
display: flex;
justify-content: center;
align-items: center;
}
.search-txt{
border: none;
background: none;
outline: none;
float: left;
padding: 0;
color: #fff;
font-size: 16px;
line-height: 40px;
transition: 0.4s;
width: 0;
transition: 0.5s;
}