.box{
  height: 50px;
  background:#808B96;
  padding: 5px;
  text-align: center;
  display: none;

}
.box input {
 position: relative;
 display: inline-block;
box-sizing: border-box;
transition: .5s;

}
.box input[type="text"] {
  background: #fff;
  width: 50%;
  height: 40px;
  border:none;
  outline: none;
  padding: 0 25px;
  border-radius: 25px 0 0 25px;
}
.box input[type="submit"] {
  position: relative;
  border-radius: 0 25px 25px 0;
    width: 20%;
  height: 40px;
  left:-4px;
    border:none;
  outline: none;
  cursor: pointer;
  background:#ffc107;
  font-weight: bold;
}
@media only screen and (max-width:479px) {
  .box input[type="text"] {
    font-size:12px;
    width: 70%;
  }
  .box input[type="submit"] {
    width: 15%;
  }
  #search {
    font-size:12px;
    width:30px;
  }
}