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

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

body {
  overflow-x: hidden;
}

/* Header scroll state */
.header-scrolled {
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
  background-color: transparent;
}

.header-scrolled.scrolled {
  background-color: rgba(2, 4, 10, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

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

.menu-line-top {
  transform-origin: center;
}

.menu-line-mid {
  transform-origin: center;
}

.menu-line-bot {
  transform-origin: center;
}

.menu-open .menu-line-top {
  transform: translateY(3.5px) rotate(45deg);
}

.menu-open .menu-line-mid {
  opacity: 0;
}

.menu-open .menu-line-bot {
  transform: translateY(-3.5px) rotate(-45deg);
}

.mobile-nav-link {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

#mobile-menu.open .mobile-nav-link {
  opacity: 1;
  transform: translateY(0);
}

#mobile-menu.open .mobile-nav-link:nth-child(1) { transition-delay: 0.05s; }
#mobile-menu.open .mobile-nav-link:nth-child(2) { transition-delay: 0.1s; }
#mobile-menu.open .mobile-nav-link:nth-child(3) { transition-delay: 0.15s; }
#mobile-menu.open .mobile-nav-link:nth-child(4) { transition-delay: 0.2s; }
#mobile-menu.open .mobile-nav-link:nth-child(5) { transition-delay: 0.25s; }

/* Hero animations — always visible, never hidden */
.hero-eyebrow {
  animation: fadeDown 0.8s ease both;
}

.hero-headline {
  animation: fadeUp 0.8s ease 0.15s both;
}

.hero-sub {
  animation: fadeUp 0.8s ease 0.3s both;
}

.hero-cta {
  animation: fadeUp 0.8s ease 0.45s both;
}

.hero-stats {
  animation: fadeUp 0.8s ease 0.6s both;
}

.hero-scroll {
  animation: fadeUp 0.8s ease 0.75s both;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeDown {
  from {
    opacity: 0;
    transform: translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Scroll reveal — progressive enhancement, only below fold */
.reveal {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(32px);
  }

  .reveal.revealed {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Subtle gradient divider */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(62, 245, 173, 0.2), transparent);
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #02040a;
}

::-webkit-scrollbar-thumb {
  background: rgba(62, 245, 173, 0.3);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(62, 245, 173, 0.5);
}

/* Selection */
::selection {
  background: rgba(62, 245, 173, 0.25);
  color: #fff;
}