/* ===== BASE ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; }

/* ===== NAV ===== */
.nav-link { position: relative; }
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: currentColor;
  transition: width 0.3s ease;
}
.nav-link:hover::after { width: 100%; }

#nav.scrolled {
  background: rgba(3, 9, 20, 0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(94, 234, 212, 0.08);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* Mobile menu */
.mobile-link { transition: opacity 0.3s ease; }
#mobile-menu.open { opacity: 1; pointer-events: all; }
#mobile-menu.closed { opacity: 0; pointer-events: none; }

.menu-line { transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
#menu-toggle.active .menu-line:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}
#menu-toggle.active .menu-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
#menu-toggle.active .menu-line:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
  width: 1.5rem;
}

/* ===== MARQUEE ===== */
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.animate-marquee {
  animation: marquee 25s linear infinite;
}
.animate-marquee:hover {
  animation-play-state: paused;
}

/* ===== SCROLL REVEAL ===== */
.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.revealed {
  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; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
  .animate-marquee { animation: none; }
  html { scroll-behavior: auto; }
  img { transition: none; }
}

/* ===== SELECTION ===== */
::selection {
  background: rgba(94, 234, 212, 0.25);
  color: #f0f3fa;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #030914; }
::-webkit-scrollbar-thumb {
  background: rgba(94, 234, 212, 0.2);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(94, 234, 212, 0.4); }