body {
  background: #7D26CD;
}
body .search-box {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #ccc;
  height: 40px;
  border-radius: 40px;
  padding: 10px;
}
body .search-box:hover .s-box {
  width: 240px;
  padding: 0 6px;
}
body .search-box:hover .s-btn {
  background: #fff;
}
body .search-box .s-btn {
  color: #7D26CD;
  float: right;
  width: 40px;
  height: 40px;
  transition: .4s;
  border-radius: 50%;
  background: #ccc;
  display: flex;
  justify-content: center;
  align-items: center;
}
body .search-box .s-btn i {
  font-size: 20px;
}
body .search-box .s-box {
  border: none;
  background: none;
  outline: none;
  float: left;
  padding: 0;
  color: #7D26CD;
  font-size: 16px;
  transition: .5s;
  line-height: 40px;
  width: 0px;
}