body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #000;
  margin: 0;
}

.gradient-btn {
  background-color: #000;
  border: none;
  border-radius: 12px;
  padding: 10px 20px;
  font-size: 16px;
  color: #fff;
  cursor: pointer;
  position: relative;
  font-family: Arial, sans-serif;
  outline: none;
  overflow: hidden;
  transition: color 0.3s ease;
}

.gradient-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 12px;
  padding: 2px;
  background: linear-gradient(90deg, red, yellow, green, blue);
  -webkit-mask: 
      linear-gradient(#fff 0 0) content-box, 
      linear-gradient(#fff 0 0);
  mask: 
      linear-gradient(#fff 0 0) content-box, 
      linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  pointer-events: none;
  transition: background 0.3s ease;
}

.gradient-btn:hover::before {
  background: linear-gradient(90deg, blue, green, yellow, red); /* Reverse gradient on hover */
}

.gradient-btn:hover {
  color: #ccc; /* Change text color on hover */
}