<button class="bhe-15__btn">Hover Me</button>

.bhe-15__btn {
  font-size: 13.5px;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  letter-spacing: 0.02em;
  color: inherit;
  background: transparent;
}

.bhe-15__btn {
  position: relative;
  border: none;
}
.bhe-15__btn::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 8px;
  padding: 2px;
  background: conic-gradient(#7c6cff, #ff6c8a, #2ecc8a, #f5a623, #7c6cff);
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s;
}
.bhe-15__btn:hover::before {
  opacity: 1;
  animation: spin 2s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .bhe-15__btn,
  .bhe-15__btn * {
    animation: none !important;
  }
}