.search-box{
    width: fit-content;
    height: fit-content;
    /* position: fixed; */
    left: 50%;
      -ms-transform: translate(-50%, -50%);
      transform: translate(25%, 25%);
  }
.input-search{
    height: 50px;
    width: 50px;
    border-style: none;
    padding: 10px;
    font-size: 18px;
    letter-spacing: 2px;
    outline: none;
    border-radius: 25px;
    transition: all .5s ease-in-out;
    background-color: #a4ced2;
    padding-right: 40px;
    color:#0076c0; /* text color */
  }
.input-search::placeholder{
    color:rgba(0, 118, 192,.5);
    font-size: 18px;
    letter-spacing: 2px;
    font-weight: 100;
  }
.btn-search{
    width: 50px;
    height: 50px;
    border-style: none;
    font-size: 20px;
    font-weight: bold;
    outline: none;
    cursor: pointer;
    border-radius: 50%;
    position: absolute;
    right: 0px;
    color:#ffffff ;
    background-color:transparent;
    pointer-events: painted;  
  }
.btn-search:focus ~ .input-search{
    width: 300px;
    border-radius: 0px;
    background-color: transparent;
    border-bottom:1px solid rgba(0, 118, 192,.5); /*bottom line*/
    transition: all 500ms cubic-bezier(0, 0.110, 0.35, 2);
  }
.input-search:focus{
    width: 300px;
    border-radius: 0px;
    background-color: transparent;
    border-bottom:1px solid rgba(0, 118, 192,.5);
    transition: all 500ms cubic-bezier(0, 0.110, 0.35, 2);
  }