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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Scroll reveal – progressive enhancement, hidden by default for JS-less readers */
.scroll-reveal {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

@media (prefers-reduced-motion: no-preference) {
  .scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
  }
  .scroll-reveal:not(.revealed) {
    opacity: 0;
    transform: translateY(24px);
  }
}

/* Mobile menu */
.mobile-link {
  display: block;
}

/* Nav scroll state */
.nav-scrolled {
  background: rgba(255, 255, 255, 0.95) !important;
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 12px rgba(10, 37, 64, 0.08);
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f0fdf9; }
::-webkit-scrollbar-thumb { background: #99f6db; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #5eead4; }

/* Focus visible */
:focus-visible {
  outline: 2px solid #5eead4;
  outline-offset: 2px;
}

/* Subtle pattern for hero overlay */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(94, 234, 212, 0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 80%, rgba(94, 234, 212, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 1;
}

#hero > .absolute { z-index: 2; }
#hero > .relative { z-index: 3; }