body { font-family: 'Inter', sans-serif; }
.counter-reset { counter-reset: step; }
.counter-reset li::before { counter-increment: step; content: counter(step); }
.fade-section { opacity: 0; transform: translateY(30px); transition: opacity 0.7s, transform 0.7s; }
.fade-section.visible { opacity: 1; transform: translateY(0); }
.scroll-top-btn {
  position: fixed;
  right: 2rem;
  bottom: 2rem;
  z-index: 100;
  display: none;
  background: linear-gradient(90deg, #a21caf 0%, #18181b 100%);
  color: #fff;
  border-radius: 9999px;
  box-shadow: 0 4px 24px 0 rgba(162,28,175,0.15);
  padding: 0.75rem 1.5rem;
  font-size: 1.25rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: opacity 0.3s, transform 0.3s;
  opacity: 0;
  transform: translateY(40px);
  display: flex;
  align-items: center;
  justify-content: center;
}
.scroll-top-btn.visible {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}
.scroll-top-btn:hover {
  background: linear-gradient(90deg, #d946ef 0%, #27272a 100%);
  box-shadow: 0 8px 32px 0 rgba(162,28,175,0.25);
}
@media (max-width: 640px) {
  .scroll-top-btn {
    padding: 0.75rem;
    font-size: 1.5rem;
    min-width: 0;
    width: 3rem;
    height: 3rem;
  }
  .scroll-top-btn .scroll-top-text {
    display: none;
  }
}