.header-button a {
  background-color: #363636;
  color: #FFA500; /* Cam thay cho vàng */
  padding: 0px 15px;
  font-size: 15px;
  line-height: 38px;
  border-radius: 10px;
  border: 1px solid #fc8f00;
  margin: 10px 0 10px;
  text-decoration: none;
  animation: okvip 2s infinite;
}

@keyframes okvip {
  0% {
    transform: scale(0.9);
    border-radius: 20px;
    box-shadow: 0 0 0 0 rgb(255 0 0 / 70%), 0 0 0 0 rgb(255 165 0 / 70%);
  }

  40% {
    border-radius: 20px;
    transform: scale(1);
    box-shadow: 0 0 0 10px rgb(255 200 0 / 21%), 0 0 0 0 rgb(255 165 0 / 94%);
  }

  80% {
    border-radius: 20px;
    transform: scale(1);
    box-shadow: 0 0 0 10px rgb(255 0 0 / 0%), 0 0 0 20px rgb(255 0 0 / 0%);
  }

  100% {
    border-radius: 20px;
    transform: scale(0.9);
    box-shadow: 0 0 0 0 rgb(255 0 0 / 0%), 0 0 0 20px rgb(255 0 0 / 0%);
  }
}

.buttondk {
  background-color: #fc8f00;
  color: #FFA500; /* Cam thay cho vàng */
  font-size: 13px;
  width: 100%;
  height: 35px;
  border-radius: 10px;
  border: 1px solid #fc8f00;
  margin: 1px 1px;
  text-decoration: none;
  animation: facai 2s infinite;
}

@keyframes facai {
  0% {
    transform: scale(0.9);
    border-radius: 5px;
    box-shadow: 0 0 0 0 rgb(255 0 0 / 70%), 0 0 0 0 rgb(255 165 0 / 70%);
  }

  40% {
    border-radius: 5px;
    transform: scale(1);
    box-shadow: 0 0 0 10px rgb(255 200 0 / 21%), 0 0 0 0 rgb(255 165 0 / 94%);
  }

  80% {
    border-radius: 5px;
    transform: scale(1);
    box-shadow: 0 0 0 10px rgb(255 0 0 / 0%), 0 0 0 20px rgb(255 0 0 / 0%);
  }

  100% {
    border-radius: 5px;
    transform: scale(0.9);
    box-shadow: 0 0 0 0 rgb(255 0 0 / 0%), 0 0 0 20px rgb(255 0 0 / 0%);
  }
}