.search-box {
  position: absolute;
  /*top: 50%;*/
  /*left: 50%;*/
  /*transform: translate(-50%, -50%);*/
  background: #49525e;
  height: 40px;
  /*border-radius: 40px;*/
  padding: 8px;
  border-radius: 10px;
}

.search-box:hover > .search-txt {
  width: 240px;
  padding: 0 6px;
  top: 50px;
}

.search-box:hover > .search-btn {
  background: white;
}

.search-box > input:focus,
.search-box > input:not(:placeholder-shown) {
  width: 240px;
  padding: 0 6px;
  top: 50px;
}

.search-btn {
  color: #e84118;
  float: right;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #2f3640;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: 0.4s;
  text-decoration: none;
}

.search-txt {
  border: none;
  background: none;
  outline: none;
  float: left;
  padding: 0;
  color: white;
  font-size: 16px;
  transition: 0.4s;
  line-height: 40px;
  width: 0px;
}