*, *::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: #0d9488;
  color: #f0fdfa;
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  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; }

/* Hero animation */
.hero-eyebrow {
  opacity: 0;
  animation: fadeUp 0.8s 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-headline {
  opacity: 0;
  animation: fadeUp 0.8s 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-subtitle {
  opacity: 0;
  animation: fadeUp 0.8s 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-cta {
  opacity: 0;
  animation: fadeUp 0.8s 0.9s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Section animations */
.section-eyebrow {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.section-eyebrow.visible {
  opacity: 1;
  transform: translateY(0);
}

.section-heading {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.section-heading.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Header scroll state */
.header-scrolled {
  background: rgba(2, 6, 23, 0.92) !important;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* Smooth focus */
a:focus-visible, button:focus-visible {
  outline: 2px solid #5eead4;
  outline-offset: 4px;
  border-radius: 4px;
}

/* Menu item hover line */
.group:hover::after {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background: #0d9488;
  margin-top: 4px;
  opacity: 0.4;
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #0f172a;
}
::-webkit-scrollbar-thumb {
  background: #1e293b;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #334155;
}

/* Mobile menu transition */
#mobile-menu {
  transition: opacity 0.3s ease, transform 0.3s ease;
}

#mobile-menu.hidden {
  opacity: 0;
  pointer-events: none;
}

#mobile-menu:not(.hidden) {
  opacity: 1;
  pointer-events: auto;
}

/* Image lazy load placeholder */
img {
  backface-visibility: hidden;
}