/* ── BLOX ANIMATIONS (MINIMAL) ───────────────────────────── */

/* Smooth scroll */
html { scroll-behavior: smooth; }

/* Fade-in on scroll */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger siblings */
.fade-in:nth-child(2) { transition-delay: 80ms; }
.fade-in:nth-child(3) { transition-delay: 160ms; }
.fade-in:nth-child(4) { transition-delay: 240ms; }

/* Hover lift — 4px, fast */
.sc,
.pt-card,
.tc,
.calc-card,
.rev-card,
.diff-item {
  transition: transform 0.22s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}
.sc:hover,
.pt-card:hover,
.tc:hover,
.calc-card:hover,
.rev-card:hover,
.diff-item:hover {
  transform: translateY(-4px);
}

/* Smoother button transitions */
.btn-or,
.btn-line {
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease,
              transform 0.18s ease;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .fade-in { opacity: 1; transform: none; transition: none; }
  .sc, .pt-card, .tc, .calc-card, .rev-card, .diff-item { transition: none; }
}