button.btn{
  background: transparent;
  color: rgb(45, 45, 45);
  border: 2px solid rgb(51, 51, 51);
  font-size: 18px;
  
  padding: 18px 60px;
  text-transform: uppercase;
  cursor: pointer;
  display: inline-block;
  margin: 15px 30px;
  -webkit-transition: all 0.4s;
  -moz-transition: all 0.4s;
  transition: all 0.4s;
}


button.btn-1:hover{
  background-color: rgb(35, 35, 35);
  color: rgb(255, 255, 255);
  -webkit-transition: all 0.4s;
  -moz-transition: all 0.4s;
  transition: all 0.4s;
}