/* Base & Utilities */
  html {
    scroll-behavior: smooth;
  }

  body {
    overflow-x: hidden;
  }

  ::selection {
    background-color: rgba(110, 231, 183, 0.3);
    color: #060C1A;
  }

  /* Scroll Reveal Animations */
  .reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  }

  /* Hero entrance animations (only for hero, runs on load) */
  .hero-elem {
    opacity: 0;
    transform: translateY(24px);
    animation: heroFadeUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  }

  .hero-elem:nth-child(1) { animation-delay: 0.1s; }
  .hero-elem:nth-child(2) { animation-delay: 0.25s; }
  .hero-elem:nth-child(3) { animation-delay: 0.4s; }
  .hero-elem:nth-child(4) { animation-delay: 0.55s; }

  @keyframes heroFadeUp {
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  /* Scroll reveal (below-the-fold only, progressive enhancement) */
  @media (prefers-reduced-motion: no-preference) {
    .reveal {
      opacity: 0;
      transform: translateY(30px);
    }

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

  /* Navbar scroll state */
  #navbar.scrolled {
    background-color: rgba(3, 7, 18, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
  }

  /* Mobile menu open state */
  #mobileMenu.open {
    max-height: 400px;
  }

  /* Staggered reveal delays */
  .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; }
  .reveal-delay-5 { transition-delay: 0.5s; }
  .reveal-delay-6 { transition-delay: 0.6s; }

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

  ::-webkit-scrollbar-track {
    background: #060C1A;
  }

  ::-webkit-scrollbar-thumb {
    background: rgba(110, 231, 183, 0.3);
    border-radius: 4px;
  }

  ::-webkit-scrollbar-thumb:hover {
    background: rgba(110, 231, 183, 0.5);
  }

  /* Select styling */
  select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
  }

  /* Reduced motion */
  @media (prefers-reduced-motion: reduce) {
    html {
      scroll-behavior: auto;
    }

    .hero-elem {
      opacity: 1;
      transform: none;
      animation: none;
    }

    .reveal {
      opacity: 1;
      transform: none;
      transition: none;
    }
  }