#bdModal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.6);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s ease;
  z-index: 9999;
}

#bdModal.show {
  opacity: 1;
  visibility: visible;
}

.bd-box {
  background: #fff;
  width: 90%;
  max-width: 420px;
  padding: 24px;
  border-radius: 12px;
  text-align: center;
}

.bd-go {
  display: block;
  margin-top: 16px;
  padding: 14px;
  background: #3a86ff;
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  font-size: 20px;
}

.bd-close {
  margin-top: 12px;
  background: none;
  border: none;
  color: #999;
  cursor: pointer;
  font-size: 2px;
}