<div class="container">
  <input type="text" placeholder="Search..">
  <div class="search"></div>

  @import url('https://fonts.googleapis.com/css2?family=Open+Sans&display=swap');

  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  html,
  body {
    width: 100%;
    height: 100%;
  }

  body {
    background: #222222;
  }

  .container {
    position: absolute;
    margin: auto;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 300px;
    height: 100px;
  }

  .container .search {
    position: absolute;
    margin: auto;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 50px;
    background: #fff;
    border-radius: 50%;
    transition: all 1s;
    z-index: 4;
    /* box-shadow: 0 0 25px 0 rgba(0, 0, 0, 0.4); */
  }

  .container .search:hover {
    cursor: pointer;
  }

  .container .search::before {
    content: "";
    position: absolute;
    margin: auto;
    top: 10px;
    right: 8px;
    bottom: -5px;
    left: 22px;
    width: 12px;
    height: 2px;
    background: #111;
    transform: rotate(45deg);
    /* transition: all .5s ease; */
  }

  .container .search::after {
    content: "";
    position: absolute;
    margin: auto;
    top: -5px;
    right: 0;
    bottom: 0;
    left: -5px;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    border: 2px solid #111;
    /* transition: all .5s; */
    /* transition: all .5s ease-in-out; */
  }

  .container input {
    font-family: 'Open Sans', sans-serif;
    position: absolute;
    margin: auto;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 50px;
    outline: none;
    border: none;
    background: #fff;
    color: #111;
    /* text-shadow: 0 0 10px crimson; */
    padding: 0 80px 0 20px;
    border-radius: 30px;
    box-shadow: 12px 13px 25px 0 #111, 8px 9px 25px 0 rgba(0, 0, 0, 0.2);
    transition: all 1s;
    opacity: 0;
    z-index: 5;
    font-weight: bolder;
    letter-spacing: 0.1em;
  }

  .container input:hover {
    cursor: pointer;
  }

  .container input:focus {
    width: 300px;
    opacity: 1;
    cursor: text;
  }

  .container input:focus~.search {
    right: -240px;
    background: transparent;
    z-index: 6;
  }

  .container input:focus~.search::before {
    top: 28px;
    left: 15px;
    width: 25px;
    height: 2px;
    bottom: 25px;
  }

  .container input:focus~.search::after {
    top: 29px;
    left: -8px;
    /* width: -25px; */
    width: 25px;
    right: -15px;
    height: 2px;
    border: none;
    bottom: 25px;
    /* margin: -25px 0px 0px 20px; */
    background: #111;
    border-radius: 0%;
    transform: rotate(-45deg);
  }

  .container input::placeholder {
    color: #111;
    opacity: 0.5;
    font-weight: bolder;
  }