/* Анимированный градиент + тень */
.btn-glow {
  position: relative;
  display: inline-block;
  padding: 18px 42px;
  font-weight: 600;
  color: #fff;
  text-align: center;
  border: none;
  border-radius: 14px;
  background: linear-gradient(135deg, #ff6b6b, #f8e71c, #50e3c2);
  background-size: 400% 400%;
  animation: gradientFlow 6s ease infinite;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease;
}

.btn-glow::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  border-radius: inherit;
  background: inherit;
  filter: blur(10px);
  opacity: 0.6;
  z-index: -1;
}

.btn-glow:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.3);
}

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