CSS Button Dengan Efek Transition Hover

body {
    background: url("https://lh6.googleusercontent.com/-e0_3IuBZwgs/TyvWQEKqSzI/AAAAAAAAF_w/fuoTc-tNh2Y/d/refreshbg.png") repeat scroll 0 0 #EBEBEB;
    padding: 20px;
    word-wrap: break-word;
}
#button .icon {
  background:#E3E3E3 url('https://lh3.googleusercontent.com/--e_YVckfUbg/TyvWSQ-Sa3I/AAAAAAAAF_4/A6xydsmRC6E/d/refreshcode.png') 3px 0 no-repeat;
  -moz-border-radius:10px;
  -webkit-border-radius:10px;
  -o-border-radius:10px;
  border-radius:10px;
  display:block;
  color:#212121;
  float:none;
  height:80px;
  width: 80px;
  line-height:80px;
  margin:10px auto 0;
  padding-top:1px;
  position:relative;
  text-shadow:0 1px 0 #FAFAFA;
  text-align:center;
  text-decoration:none;
  white-space:nowrap;
  -webkit-transition:width .25s ease-in-out,
background-color .25s ease-in-out;
  -ms-transition:width .25s ease-in-out,
background-color .25s ease-in-out;
  -moz-transition:width .25s ease-in-out,
background-color .25s ease-in-out;
  -o-transition:width .25s ease-in-out,
background-color .25s ease-in-out;
  transition:width .25s ease-in-out,
background-color .25s ease-in-out;
  -webkit-box-shadow:inset 0 1px 0 #FAFAFA,rgba(0,0,0,.28) 0 2px 3px;
  -moz-box-shadow:inset 0 1px 0 #FAFAFA,rgba(0,0,0,.28) 0 2px 3px;
  -o-box-shadow:inset 0 1px 0 #FAFAFA,rgba(0,0,0,.28) 0 2px 3px;
  box-shadow:inset 0 1px 0 #FAFAFA,rgba(0,0,0,.28) 0 1px 3px;
}
#button a span {
  display:none;
}
#button:hover a span {
  display:inline;
}
#button a span {
  font-size:1.4em;
}
#button:hover .icon {
  width:420px;
}
#button .demo {
  background-position:0 -80px;
}
#button .info {
  background-position:0 -160px;
}
#button .download {
  background-position:0 0;
}

<div id="button">
    <a href="#" class="icon demo"><span>Lihat Demo</span></a>
</div>

<div id="button">
    <a href="#" class="icon download"><span>Lihat Demo</span></a>
</div>

<div id="button">
    <a href="#" class="icon info"><span>Lihat Demo</span></a>
</div>