/* =====================
   Scroll Fade In
   ===================== */

.fade-in-element {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  will-change: opacity, transform;
}

.fade-in-element.visible {
  opacity: 1;
  transform: translateY(0);
  will-change: auto;
}

/* Stagger children in grids */
.fade-in-element:nth-child(2) { transition-delay: 80ms; }
.fade-in-element:nth-child(3) { transition-delay: 160ms; }
.fade-in-element:nth-child(4) { transition-delay: 240ms; }
.fade-in-element:nth-child(5) { transition-delay: 320ms; }
.fade-in-element:nth-child(6) { transition-delay: 400ms; }

/* =====================
   Hero Shape Float
   ===================== */

@keyframes float {
  0% {
    transform: translate(0, 0) scale(1) rotate(0deg);
  }
  100% {
    transform: translate(12px, -16px) scale(1.04) rotate(3deg);
  }
}

@keyframes float-reverse {
  0% {
    transform: translate(0, 0) scale(1) rotate(0deg);
  }
  100% {
    transform: translate(-8px, 10px) scale(1.03) rotate(-2deg);
  }
}

/* =====================
   Button Hover
   ===================== */

.btn {
  transition: background-color 200ms ease,
              color 200ms ease,
              transform 200ms ease,
              box-shadow 200ms ease,
              border-color 200ms ease;
}

/* =====================
   Card Hover
   ===================== */

.card,
.pricing-card {
  transition: transform 300ms ease, box-shadow 300ms ease;
}

/* =====================
   Pill Hover
   ===================== */

.pill {
  transition: background-color 200ms ease, color 200ms ease, border-color 200ms ease;
}

/* =====================
   Navbar Link Underline
   ===================== */

.navbar__links a::after {
  transition: width 200ms ease;
}

/* =====================
   Hero Sheet Reveal
   ===================== */

@keyframes sheetReveal {
  from { scale: 0.9; border-radius: 1rem 1rem 0 0; opacity: 0; }
  10%  { opacity: 1; }
  to   { scale: 1;   border-radius: 0; opacity: 1; }
}

@keyframes sheetContentFade {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* =====================
   Reduced Motion
   ===================== */

@media (prefers-reduced-motion: reduce) {
  .fade-in-element {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero__shape,
  .hero__shape-small {
    animation: none;
  }

  .hero-sticky__scroll-line::after {
    animation: none;
  }

  .hero-reveal__sheet,
  .hero-reveal__content {
    animation: none;
    scale: 1;
    border-radius: 0;
    opacity: 1;
    transform: none;
  }

  .btn,
  .card,
  .pricing-card,
  .pill {
    transition: none;
  }
}