/* ===== Scroll Animations ===== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.stagger-children .animate-on-scroll:nth-child(1) { transition-delay: 0s; }
.stagger-children .animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.stagger-children .animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.stagger-children .animate-on-scroll:nth-child(4) { transition-delay: 0.3s; }
.stagger-children .animate-on-scroll:nth-child(5) { transition-delay: 0.4s; }
.stagger-children .animate-on-scroll:nth-child(6) { transition-delay: 0.5s; }

/* ===== Hero Entrance ===== */
.hero-title {
  opacity: 0;
  transform: translateY(20px);
  animation: heroEntrance 0.8s ease-out 0.2s forwards;
}

.hero-tagline {
  opacity: 0;
  transform: translateY(20px);
  animation: heroEntrance 0.8s ease-out 0.4s forwards;
}

.hero-ctas {
  opacity: 0;
  transform: translateY(20px);
  animation: heroEntrance 0.8s ease-out 0.6s forwards;
}

@keyframes heroEntrance {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Scroll Arrow Bounce ===== */
.scroll-arrow {
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ===== Download Button Pulse ===== */
.btn-download-pulse {
  animation: downloadPulse 2s infinite;
}

@keyframes downloadPulse {
  0%, 100% {
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4);
  }
  50% {
    box-shadow: 0 4px 40px rgba(139, 92, 246, 0.7);
  }
}

/* ===== Card Hover Lift ===== */
.feature-card {
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(139, 92, 246, 0.2);
}

/* ===== Gallery Item Hover ===== */
.gallery-item {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery-item:hover {
  transform: scale(1.02);
}

/* ===== Lightbox Fade ===== */
.lightbox {
  transition: opacity 0.3s ease;
}

/* ===== Navbar Link Underline ===== */
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent-purple);
  border-radius: 1px;
  transition: width 0.3s, left 0.3s;
}

.nav-links a:hover::after {
  width: 100%;
  left: 0;
}

.nav-links a.active::after {
  width: 100%;
  left: 0;
}

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

  .hero-title,
  .hero-tagline,
  .hero-ctas {
    opacity: 1;
    transform: none;
    animation: none;
  }

  .btn-download-pulse {
    animation: none;
  }

  .feature-card,
  .gallery-item {
    transition: none;
  }

  .lightbox {
    transition: none;
  }

  .nav-links a::after {
    transition: none;
  }
}