.wrap-input-18 { 
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.wrap-input-18 .search {
  margin: 20px;
}

.wrap-input-18 .search > div {
  display: inline-block;
  position: relative;
}

.wrap-input-18 .search > div:after {
  content: "";
  background: 
white;
  width: 4px;
  height: 20px;
  position: absolute;
  top: 40px;
  right: 2px;
  transform: rotate(135deg);
}

.wrap-input-18 .search > div > input {
  color: 
white;
  font-size: 16px;
  background: 
transparent;
  width: 25px;
  height: 25px;
  padding: 10px;
  border: solid 3px 
white;
  outline: none;
  border-radius: 35px;
  transition: width 0.5s;
}

.wrap-input-18 .search > div > input::placeholder {
  color: 
#efefef;
  opacity: 0;
  transition: opacity 150ms ease-out;
}

.wrap-input-18 .search > div > input:focus::placeholder {
  opacity: 1;
}

.wrap-input-18 .search > div > input:focus,
.wrap-input-18 .search > div > input:not(:placeholder-shown) {
  width: 250px;
}