:root {
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', system-ui, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  background-color: #020510;
  color: #ffffff;
}

/* NAV SCROLL STATE */
#site-header.scrolled {
  background: rgba(2, 5, 16, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

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

#mobile-menu.open .mobile-link {
  animation: fadeUp 0.4s ease forwards;
  opacity: 1;
}

#mobile-menu .mobile-link:nth-child(1) { animation-delay: 0.05s; }
#mobile-menu .mobile-link:nth-child(2) { animation-delay: 0.1s; }
#mobile-menu .mobile-link:nth-child(3) { animation-delay: 0.15s; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* HAMBURGER ANIMATION */
#menu-toggle.active .line:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
  width: 6;
}
#menu-toggle.active .line:nth-child(2) {
  opacity: 0;
}
#menu-toggle.active .line:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
  width: 6;
}

/* SCROLL REVEAL — below fold only, progressive enhancement */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }

  .reveal[data-reveal] {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }

  .reveal[data-reveal="delay-1"] { transition-delay: 0.1s; }
  .reveal[data-reveal="delay-2"] { transition-delay: 0.2s; }
  .reveal[data-reveal="delay-3"] { transition-delay: 0.3s; }
}

/* CUSTOM SCROLLBAR */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #020510;
}
::-webkit-scrollbar-thumb {
  background: rgba(46, 196, 182, 0.3);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(46, 196, 182, 0.5);
}

/* SELECTION */
::selection {
  background: rgba(46, 196, 182, 0.3);
  color: #ffffff;
}