@keyframes shine {
  0%   { box-shadow: 0 0 0 rgba(255,255,255,0); }
  50%  { box-shadow: 0 0 15px rgba(255,255,255,0.9); }
  100% { box-shadow: 0 0 0 rgba(255,255,255,0); }
}

/* ⚠️ ВАЖНО: используем твой класс */
.uc-shine-button .t-btn,
.uc-shine-button a {
  animation: shine 2s infinite ease-in-out;
}

@keyframes shine-move {
  0% {
    left: -40%;
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    left: 120%;
    opacity: 0;
  }
}

/* фиксируем кнопку */
.uc-shine-button .t-btn {
  position: relative;
  overflow: hidden;
  transform: none !important; /* ⛔ убираем полёты */
}

/* сам блик */
.uc-shine-button .t-btn::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -40%;
  width: 30%;
  height: 200%;
  background: linear-gradient(
    120deg,
    transparent,
    rgba(255,255,255,0.7),
    transparent
  );
  animation: shine-move 2s infinite;
  pointer-events: none;
}