.header-btn a {
  color: #000;
  font-family: Futura PT;
  font-size: 17px;
  font-style: normal;
  font-weight: 450;
  line-height: normal;
  letter-spacing: 0.17px;
  display: block;
  width: 100%;
  max-width: 200px;
  padding: 8px 10px 10px;
  background: #FDB41D;
  text-align: center;
  -webkit-transition: all 0.5s ease 0s;
  transition: all 0.5s ease 0s;
  text-decoration: none;
}
.header-btn a:hover{
  background:#000;
  color:#fff;
}