/* Чорна кнопка з білим текстом */
.btn-dark {
  background: linear-gradient(45deg, #111111, #2c2c2c, #000000);
  background-size: 200% 200%;
  color: white;
  padding: 14px 32px;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  animation: gradientFlow 6s ease infinite;
  transition: all 0.3s ease;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);
}

.btn-dark:hover {
  transform: scale(1.05);
  box-shadow: 0 0 14px rgba(255, 255, 255, 0.2);
}

/* Біла кнопка з чорним текстом */
.btn-light {
  background: white;
  color: black;
  padding: 14px 32px;
  font-weight: 600;
  border: 1px solid #000;
  border-radius: 8px;
  transition: all 0.3s ease;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.1);
}

.btn-light:hover {
  background: linear-gradient(45deg, #f5f5f5, #ffffff, #eaeaea);
  background-size: 200% 200%;
  animation: gradientFlow 4s ease infinite;
  transform: scale(1.04);
}

/* Анімація градієнта */
@keyframes gradientFlow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}