/* Base & Reset */
*, *::before, *::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #0f172a;
}
::-webkit-scrollbar-thumb {
  background: #0d9488;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #14b8a6;
}

/* Marquee Animation */
@keyframes marquee {
  0% { transform: translateX(0%); }
  100% { transform: translateX(-50%); }
}

.animate-marquee {
  animation: marquee 25s linear infinite;
}

/* Scroll Reveal Animations */
/* Default: content is visible (progressive enhancement) */
.reveal-up,
.reveal-left,
.reveal-right {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

@media (prefers-reduced-motion: no-preference) {
  .reveal-up {
    opacity: 0;
    transform: translateY(30px);
  }
  .reveal-left {
    opacity: 0;
    transform: translateX(-30px);
  }
  .reveal-right {
    opacity: 0;
    transform: translateX(30px);
  }

  .reveal-up.revealed,
  .reveal-left.revealed,
  .reveal-right.revealed {
    opacity: 1;
    transform: none;
  }
}

/* Navbar scroll state */
.navbar-scrolled #navbar {
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.05);
}

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

#mobileMenu.close {
  opacity: 0;
  pointer-events: none;
}

/* Mobile link stagger */
.mobile-link {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease, color 0.2s ease;
}

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

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

/* Menu button active */
#menuBtn.active .menu-line:nth-child(1) {
  transform: rotate(45deg) translate(3px, 3px);
}
#menuBtn.active .menu-line:nth-child(2) {
  opacity: 0;
}
#menuBtn.active .menu-line:nth-child(3) {
  width: 24px;
  transform: rotate(-45deg) translate(3px, -3px);
}

/* Focus styles */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid #2dd4bf;
  outline-offset: 2px;
  border-radius: 4px;
}

/* Selection */
::selection {
  background: #14b8a6;
  color: white;
}