TryIt Editor v2.0 - Как создать поле поиска?

Source Code: (back to article)

<!DOCTYPE html>
<html>
  <head>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
    <title>Поле поиска</title>
    <style>
      body {
      margin: 0;
      padding: 0;
      background: #00a08d;
      }
      .search-box {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      background: #666666;
      height: 40px;
      border-radius: 40px;
      padding: 10px;
      }
      .search-box:hover > .search-txt {
      width: 240px;
      padding: 0 6px;
      }
      .search-box:hover > .search-btn {
      background: white;
      color: black;
      }
      .search-btn {
      color: #eeeeee;
      float: right;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #2f3640;
      display: flex;
      justify-content: center;
      align-items: center;
      transition: 0.4s;
      color: white;
      cursor: pointer;
      text-decoration:none;
      }
      .search-btn > i {
      font-size: 20px;
      }
      .search-txt {
      border: none;
      background: none;
      outline: none;
      float: left;
      padding: 0;
      color: white;
      font-size: 16px;
      transition: 0.4s;
      line-height: 40px;
      width: 0px;
      font-weight: bold;
      }
      }
    </style>
  </head>
  <body>
    <div class="search-box">
      <input type="text" name="" class="search-txt" placeholder="Type to search"/>
      <a class="search-btn" href="#">
      <i class="fa fa-search" aria-hidden="true"></i>
      </a>
    </div>
  </body>
</html>