.btn {
  margin: 7px;
  margin-right:1.7em;
  padding: 15px 9px;
  border: none;
  outline: none;
  color: #FFF;
  cursor: pointer;
  position: relative;
  z-index: 0;
  font-size: 1.1em;
  border-radius: 12px;
}


.btn::after {
  content: "";
  z-index: -1;
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: #333;
  left: 0;
  top: 0;
  border-radius: 10px;
}

/* glow */
.btn::before {
  content: "";
  background: linear-gradient(
    45deg,
    #FF0000, #FF7300, #FFFB00, #48FF00,
    #00FFD5, #002BFF, #FF00C8, #FF0000
  );
  position: absolute;
  top: -2px;
  left: -2px;
  background-size: 600%;
  z-index: -1;
  width: calc(100% + 4px);
  height: calc(100% + 4px);
  filter: blur(8px);
  animation: glowing 20s linear infinite;
  transition: opacity .3s ease-in-out;
  border-radius: 10px;
  opacity: 1; /* Set to 1 to make it always visible */
}

@keyframes glowing {
  0% {background-position: 0 0;}
  50% {background-position: 400% 0;}
  100% {background-position: 0 0;}
}

/* Remove hover styles */
.btn:active:after {
  background: transparent;
}

.btn:active {
  color: #000;
  font-weight: bold;
}