/* Base & Typography */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

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

  body {
    overflow-x: hidden;
  }

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

  .animate-marquee {
    animation: marquee 30s linear infinite;
  }

  /* Scroll Reveal Animations */
  .reveal-up {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .reveal-left {
    opacity: 1;
    transform: translateX(0);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .reveal-right {
    opacity: 1;
    transform: translateX(0);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  }

  /* Reduced motion */
  @media (prefers-reduced-motion: reduce) {
    .reveal-up, .reveal-left, .reveal-right {
      opacity: 1;
      transform: none;
      transition: none;
    }
    .animate-marquee {
      animation: none;
    }
    html {
      scroll-behavior: auto;
    }
  }

  /* Scroll-triggered reveals (progressive enhancement via JS) */
  .reveal-hidden {
    opacity: 0;
    transform: translateY(30px);
  }

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

  .reveal-left.reveal-hidden {
    transform: translateX(-30px);
  }

  .reveal-left.reveal-hidden.revealed {
    transform: translateX(0);
  }

  .reveal-right.reveal-hidden {
    transform: translateX(30px);
  }

  .reveal-right.reveal-hidden.revealed {
    transform: translateX(0);
  }

  /* Navbar scroll state */
  #navbar.scrolled {
    background: rgba(2, 6, 23, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(13, 148, 136, 0.15);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
  }

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

  #mobile-menu.closed {
    opacity: 0;
    pointer-events: none;
  }

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

  ::-webkit-scrollbar-track {
    background: #0f172a;
  }

  ::-webkit-scrollbar-thumb {
    background: #1e293b;
    border-radius: 4px;
  }

  ::-webkit-scrollbar-thumb:hover {
    background: #0d9488;
  }

  /* Selection color */
  ::selection {
    background: rgba(13, 148, 136, 0.4);
    color: #fff;
  }

  /* Image loading placeholder */
  img {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  }

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