body {
  margin: 0;
  padding: 0;
/*  background: #dbc5b0;*/
}

/* div */
.search-box {
/*  position: absolute;*/
/*  top: 50%;*/
/*  left: 50%;*/
/*  transform: translate(-50%, -50%);*/
  background: #cd595a;
  height: 40px;
  border-radius: 50px;
/*  padding: 10px;*/
}

/* input */
.search-input {
  outline: none;
  border: none;
  background: none;
  width: 0;
  padding: 0;
  color: #fff;
  float: left;
  font-size: 16px;
  transition: .3s;
  line-height: 40px;
}

.search-input::placeholder {
  color: #dbc5b0;
}

/* icon */
.search-btn {
  color: #fff;
  float: right;
  width: 40px;
  height: 40px;
  border-radius: 50px;
  background: #cd595a;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
  transition: .3s;
}

.search-input:focus,
.search-input:not(:placeholder-shown) {
  width: 230px;
  padding: 0 6px;
}

.search-box:hover > .search-input {
  width: 230px;
  padding: 0 6px;
}

.search-box:hover > .search-btn,
.search-input:focus + .search-btn,
.search-input:not(:placeholder-shown) + .search-btn {
  background: #fff;
  color: #cd595a;
}