.header {
  padding: 10px 16px;
  float:left;
  width:100%;
  display:none;
}
@media only screen and (max-width: 840px) {
.header {
  padding: 10px 16px;
  float:left;
  width:100%;
  display:block;
}
.sticky {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: white;
}
.header select {
    border: solid 1px #cccccc;
    background-color: #ffffff;
    padding: 10px;
    margin-bottom: 0;
    color: #000;
    font-weight: normal;
    width: 100%;
    float: left;
}
}

@media only screen and (max-width: 480px) {
.header {
  padding: 10px 16px;
  float:left;
  width:100%;
}
.sticky {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: white;
}
.header select {
    border: solid 1px #cccccc;
    background-color: #ffffff;
    padding: 10px;
    margin-bottom: 0;
    color: #000;
    font-weight: normal;
    width: 100%;
    float: left;
}
}