#header{
  position: relative;
}
#header .apply_btn{
  width: 280px;
  font-size: 18px;
  letter-spacing: 2px;
  padding: 20px;
  margin: 0 auto;
  left: 0;
  right: 0;
  bottom: 10%;
  position: absolute;
}

@media(max-width:1000px){
}

@media(max-width:770px){
  #header .apply_btn{
    width: 180px;
    padding: 15px 10px;
    font-size: 14px;
  }
}