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

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

  body {
    overflow-x: hidden;
  }

  /* ===== SCROLL REVEAL (progressive enhancement) ===== */
  @media (prefers-reduced-motion: no-preference) {
    .scroll-reveal {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }

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

    /* Stagger children */
    .scroll-reveal:nth-child(2) { transition-delay: 0.1s; }
    .scroll-reveal:nth-child(3) { transition-delay: 0.2s; }
    .scroll-reveal:nth-child(4) { transition-delay: 0.3s; }
    .scroll-reveal:nth-child(5) { transition-delay: 0.4s; }
    .scroll-reveal:nth-child(6) { transition-delay: 0.5s; }
  }

  /* ===== NAVBAR SCROLL STATE ===== */
  #navbar.scrolled {
    box-shadow: 0 4px 30px rgba(10, 22, 40, 0.3);
  }

  /* ===== BUTTON HOVER EFFECTS ===== */
  a, button {
    -webkit-tap-highlight-color: transparent;
  }

  /* ===== CUSTOM SCROLLBAR ===== */
  ::-webkit-scrollbar {
    width: 8px;
  }

  ::-webkit-scrollbar-track {
    background: #f0f4f8;
  }

  ::-webkit-scrollbar-thumb {
    background: #9fb3cc;
    border-radius: 4px;
  }

  ::-webkit-scrollbar-thumb:hover {
    background: #627d98;
  }

  /* ===== SELECTION ===== */
  ::selection {
    background: #34d4a8;
    color: #0a1628;
  }

  /* ===== FOCUS VISIBLE ===== */
  :focus-visible {
    outline: 2px solid #34d4a8;
    outline-offset: 2px;
  }

  /* ===== MOBILE MENU TRANSITIONS ===== */
  #mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  }

  #mobile-menu.open {
    max-height: 500px;
  }

  /* ===== FORM INPUTS ===== */
  input:focus,
  select:focus,
  textarea:focus {
    outline: none;
  }

  /* ===== IMAGE SHIMMER ===== */
  img {
    display: block;
    max-width: 100%;
  }

  /* ===== SUBTLE GRID PATTERN FOR SECTIONS ===== */
  .grid-pattern {
    background-image: linear-gradient(rgba(10, 22, 40, 0.03) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(10, 22, 40, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
  }
</style>