/* ========== Scroll Animations ========== */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.problems__grid .fade-in-up:nth-child(2),
.features__grid .fade-in-up:nth-child(2),
.pricing__grid .fade-in-up:nth-child(2),
.steps__grid .fade-in-up:nth-child(2) {
  transition-delay: 0.1s;
}

.problems__grid .fade-in-up:nth-child(3),
.features__grid .fade-in-up:nth-child(3),
.pricing__grid .fade-in-up:nth-child(3),
.steps__grid .fade-in-up:nth-child(3) {
  transition-delay: 0.2s;
}

.features__grid .fade-in-up:nth-child(4) {
  transition-delay: 0.3s;
}

.features__grid .fade-in-up:nth-child(5) {
  transition-delay: 0.4s;
}

.features__grid .fade-in-up:nth-child(6) {
  transition-delay: 0.5s;
}

/* ========== Hero Circle Floating ========== */
.hero__circle--lg {
  animation: float-slow 8s ease-in-out infinite;
}

.hero__circle--md {
  animation: float-medium 6s ease-in-out infinite;
}

.hero__circle--sm {
  animation: float-fast 5s ease-in-out infinite;
}

.hero__icon {
  animation: rotate-gentle 10s linear infinite;
}

@keyframes float-slow {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(15px, -20px); }
}

@keyframes float-medium {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-10px, 15px); }
}

@keyframes float-fast {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(10px, -10px); }
}

@keyframes rotate-gentle {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ========== Mobile Menu Overlay ========== */
.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  z-index: 998;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.nav-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* ========== Pricing Toggle Transition ========== */
.pricing__amount {
  transition: opacity 0.3s ease;
}

.pricing__amount.changing {
  opacity: 0.5;
}

/* ========== Reduced Motion ========== */
@media (prefers-reduced-motion: reduce) {
  .fade-in-up {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero__circle--lg,
  .hero__circle--md,
  .hero__circle--sm,
  .hero__icon {
    animation: none;
  }

  .faq__answer {
    transition: none;
  }
}