.chat-button._long .label {
    font-family: 'Montserrat';
}

@keyframes shine {
  0% { left: -100%; }
  100% { left: 100%; }
}

.shine-effect {
  position: relative;
  overflow: hidden;
}

.shine-effect::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  animation: shine 2.5s ease-in-out infinite;
}