/* ===== Reset & Base ===== */
  *, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

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

  body {
    overflow-x: hidden;
  }

  ::selection {
    background: rgba(13, 115, 119, 0.4);
    color: #f0fdfa;
  }

  /* ===== Scrollbar ===== */
  ::-webkit-scrollbar {
    width: 8px;
  }
  ::-webkit-scrollbar-track {
    background: #0f172a;
  }
  ::-webkit-scrollbar-thumb {
    background: #1e3a3a;
    border-radius: 4px;
  }
  ::-webkit-scrollbar-thumb:hover {
    background: #0d7377;
  }

  /* ===== Animations ===== */
  @keyframes fadeInUp {
    from {
      opacity: 0;
      transform: translateY(40px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  @keyframes fadeInLeft {
    from {
      opacity: 0;
      transform: translateX(-40px);
    }
    to {
      opacity: 1;
      transform: translateX(0);
    }
  }

  @keyframes fadeInRight {
    from {
      opacity: 0;
      transform: translateX(40px);
    }
    to {
      opacity: 1;
      transform: translateX(0);
    }
  }

  @keyframes scaleIn {
    from {
      opacity: 0;
      transform: scale(0.9);
    }
    to {
      opacity: 1;
      transform: scale(1);
    }
  }

  /* ===== Hero Animations ===== */
  .hero-badge {
    animation: fadeInUp 0.8s ease-out 0.2s both;
  }

  .hero-title {
    animation: fadeInUp 0.8s ease-out 0.4s both;
  }

  .hero-description {
    animation: fadeInUp 0.8s ease-out 0.6s both;
  }

  .hero-cta {
    animation: fadeInUp 0.8s ease-out 0.8s both;
  }

  .hero-image {
    animation: fadeInRight 1s ease-out 0.6s both;
  }

  /* ===== Nav ===== */
  #navbar {
    background: transparent;
    transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
  }

  #navbar.scrolled {
    background: rgba(8, 14, 26, 0.9);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(255,255,255,0.05);
  }

  /* ===== Mobile Menu ===== */
  #mobileMenu.open {
    opacity: 1;
    pointer-events: all;
  }

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

  .mobile-link {
    animation: fadeInUp 0.4s ease-out both;
  }

  .mobile-link:nth-child(1) { animation-delay: 0.05s; }
  .mobile-link:nth-child(2) { animation-delay: 0.1s; }
  .mobile-link:nth-child(3) { animation-delay: 0.15s; }
  .mobile-link:nth-child(4) { animation-delay: 0.2s; }

  /* ===== Service Cards ===== */
  .service-card {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out, background 0.5s ease, border-color 0.5s ease;
  }

  .service-card.visible {
    opacity: 1;
    transform: translateY(0);
  }

  .service-card:nth-child(1) { transition-delay: 0.05s; }
  .service-card:nth-child(2) { transition-delay: 0.1s; }
  .service-card:nth-child(3) { transition-delay: 0.15s; }
  .service-card:nth-child(4) { transition-delay: 0.2s; }
  .service-card:nth-child(5) { transition-delay: 0.25s; }
  .service-card:nth-child(6) { transition-delay: 0.3s; }

  /* ===== Section Reveals ===== */
  .reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
  }

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

  .reveal-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
  }

  .reveal-left.visible {
    opacity: 1;
    transform: translateX(0);
  }

  .reveal-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
  }

  .reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
  }

  /* ===== Back to Top ===== */
  #backToTop {
    transition: opacity 0.3s ease, transform 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
  }

  #backToTop.show {
    opacity: 1;
    pointer-events: all;
  }

  #backToTop:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(13, 115, 119, 0.4);
  }

  /* ===== Form Focus States ===== */
  input:focus, select:focus, textarea:focus {
    outline: none;
  }

  /* ===== Utility ===== */
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
  }

  /* ===== Responsive ===== */
  @media (max-width: 767px) {
    .hero-image {
      display: none;
    }

    #hero {
      min-height: 100vh;
      min-height: 100dvh;
    }
  }

  @media (min-width: 768px) and (max-width: 1023px) {
    .hero-image {
      display: none;
    }
  }