Button Search with Animation

_search.scss

.search {
  position: absolute;
  padding: 5px;
  & input {
    display: inline-block;
    border: 1px solid silver;
    font-size: 18px;
    outline: none;
    background-color: #f1f1f1;
    border-radius: 30px;
    width: 0px;
    height: 40px;
    padding: 0 20px;
    transition: all 0.6s ease;
    color: #000;
  }
  &:hover input {
    width: 240px;
  }
  & input:focus {
    width: 240px;
  }

  &-button-fast {
    position: absolute;
    top: 0;
    right: 0;
    background-color: $primary;
    width: 55px;
    height: 55px;
    line-height: 55px;
    text-align: center;
    color: #fff;
    font-size: 20px;
    border-radius: 50%;
    cursor: pointer;
  }
  &-icon {
    color: black;
    display: block;
    margin: auto;
    font-size: 20px;
  }
}

search.html

<div>
      <div className="container">
          <div className="search">
            <input type="text" placeholder="Buscar"/>
            <div className="search-button-fast">
              <i className="fas fa-search"></i>
            </div>
          </div>
      </div>
    </div>