*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; }

/* Custom scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f4fdf9; }
::-webkit-scrollbar-thumb { background: #38bf87; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #23a66e; }

/* Animation keyframes */
@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(3deg); }
}
@keyframes float-delayed {
  0%, 100% { transform: translateY(0px) rotate(12deg); }
  50% { transform: translateY(-15px) rotate(15deg); }
}

.animate-float { animation: float 6s ease-in-out infinite; }
.animate-float-delayed { animation: float-delayed 5s ease-in-out infinite; }

/* Navbar scroll state */
#nav.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 20px rgba(6, 15, 62, 0.08);
}

/* Service card stagger animation */
.service-card { opacity: 1; }

/* Mobile menu */
#mobileMenu { transition: max-height 0.3s ease, opacity 0.3s ease; }
#mobileMenu.open { display: block; }
.mobile-link { border-bottom: 1px solid #e3faf0; }
.mobile-link:last-child { border-bottom: none; }

/* Scroll reveal base (progressive enhancement) */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }
  .reveal.revealed {
    opacity: 1;
    transform: translateY(0);
  }
  .reveal-delay-1 { transition-delay: 0.1s; }
  .reveal-delay-2 { transition-delay: 0.2s; }
  .reveal-delay-3 { transition-delay: 0.3s; }
  .reveal-delay-4 { transition-delay: 0.4s; }
  .reveal-delay-5 { transition-delay: 0.5s; }
  .reveal-delay-6 { transition-delay: 0.6s; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}