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

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

  body {
    margin: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  /* Custom scrollbar */
  ::-webkit-scrollbar {
    width: 8px;
  }
  ::-webkit-scrollbar-track {
    background: #040812;
  }
  ::-webkit-scrollbar-thumb {
    background: rgba(52, 212, 168, 0.2);
    border-radius: 4px;
  }
  ::-webkit-scrollbar-thumb:hover {
    background: rgba(52, 212, 168, 0.4);
  }

  /* Selection */
  ::selection {
    background: rgba(52, 212, 168, 0.3);
    color: #fff;
  }

  /* Menu tabs */
  .menu-tab {
    background: transparent;
    color: rgba(255, 255, 255, 0.5);
    border: none;
    cursor: pointer;
    transition: all 0.25s ease;
  }
  .menu-tab:hover {
    color: rgba(255, 255, 255, 0.8);
  }
  .menu-tab.active {
    background: rgba(52, 212, 168, 0.15);
    color: #34d4a8;
    border: 1px solid rgba(52, 212, 168, 0.3);
  }

  /* Navbar scroll state */
  #navbar.scrolled {
    background: rgba(4, 8, 18, 0.92);
    backdrop-blur-xl;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
  }

  /* Mobile menu transition */
  #mobile-menu {
    animation: slideDown 0.3s ease;
  }
  @keyframes slideDown {
    from {
      opacity: 0;
      transform: translateY(-10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  /* Scroll reveal base (progressive enhancement) */
  @media (prefers-reduced-motion: no-preference) {
    .reveal {
      opacity: 0;
      transform: translateY(30px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .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; }
  }

  /* Reduced motion */
  @media (prefers-reduced-motion: reduce) {
    html {
      scroll-behavior: auto;
    }
    .reveal {
      opacity: 1;
      transform: none;
    }
    .group:hover img {
      transform: none;
    }
  }