*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  overflow-x: hidden;
}

::selection {
  background: rgba(111, 201, 164, 0.3);
  color: #f0faf5;
}

/* Scroll reveal base - content is visible by default */
.reveal {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Progressive enhancement: animated state applied by JS only */
@media (prefers-reduced-motion: no-preference) {
  .reveal.animated {
    opacity: 0;
    transform: translateY(40px);
  }
  .reveal.animated.revealed {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Gallery infinite scroll */
@keyframes scrollGallery {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

#galleryTrack {
  animation: scrollGallery 40s linear infinite;
}

#galleryTrack:hover {
  animation-play-state: paused;
}

/* Nav background transition */
nav.scrolled {
  background: rgba(4, 13, 26, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* Mobile menu transitions */
#mobileMenu.open {
  opacity: 1;
  pointer-events: all;
}

#mobileMenu:not(.open) {
  opacity: 0;
  pointer-events: none;
}

/* Smooth image loading */
img {
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #040d1a;
}
::-webkit-scrollbar-thumb {
  background: #1c3a5e;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #254d7a;
}