Transition input width

Question

I have the input search field. When I click on it I need it to become wider performing smooth transition from right to left, i.e. the input is located on the right side of the page and when I click on it it should stretch to the left in some number of pixels and become wider.

Here's my css:

#header #search input {
background: #FFF;
padding: 1px 1px 1px 5px;
width: 178px;
height: 21px;
border: 1px solid #CCCCCC;
border-radius: 6px;
-webkit-transition: all .5s;
-moz-transition: all .5s;
transition: all .5s;

}
#header #search input:focus {
background: #FFF;
padding: 1px 1px 1px 5px;
width: 300px;
height: 21px;
border: 1px solid #CCCCCC;

Could you help me with implementing that?

Answer 1

input[type="search"] {
  background: #FFF;
  padding: .5rem 1rem;
  position: relative;
  top: 0;
  left: 0;
  width: 178px;
  height: 40px;
  outline: none;
  border: 1px solid #CCCCCC;
  border-radius: 6px;
  transition: all .5s;
}

input[type="search"]:focus {
  width: 300px;
  top: 0;
  right: 100%;
}

<div style="text-align:right;">
  <input type="search" id="search" />
</div>