/* ─── Scroll animations ─────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.channel-card.fade-in:nth-child(2)  { transition-delay: 0.05s; }
.channel-card.fade-in:nth-child(3)  { transition-delay: 0.10s; }
.channel-card.fade-in:nth-child(4)  { transition-delay: 0.15s; }
.channel-card.fade-in:nth-child(5)  { transition-delay: 0.20s; }
.channel-card.fade-in:nth-child(6)  { transition-delay: 0.25s; }
.channel-card.fade-in:nth-child(7)  { transition-delay: 0.30s; }
.channel-card.fade-in:nth-child(8)  { transition-delay: 0.35s; }
.channel-card.fade-in:nth-child(9)  { transition-delay: 0.40s; }
.channel-card.fade-in:nth-child(10) { transition-delay: 0.45s; }
.step.fade-in:nth-child(2) { transition-delay: 0.1s; }
.step.fade-in:nth-child(3) { transition-delay: 0.2s; }
.step.fade-in:nth-child(4) { transition-delay: 0.3s; }