.challenge-form-card {
  margin-top: 10px;
  animation: fadeIn 0.4s ease-out;
}

.challenge-form-card h2 {
  text-align: center;
  margin-bottom: 24px;
  color: var(--tg-theme-link-color);
  font-size: 22px;
}

#custom-exercise-group {
  animation: slideDown 0.3s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    height: 0;
    overflow: hidden;
    margin-bottom: 0;
  }
  to {
    opacity: 1;
    height: auto;
    margin-bottom: 20px;
  }
}