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

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

  body {
    overflow-x: hidden;
  }

  /* Custom selection color */
  ::selection {
    background-color: rgba(13, 148, 136, 0.2);
    color: #0f766e;
  }

  /* Navbar scroll effect */
  nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06), 0 4px 20px rgba(0, 0, 0, 0.04);
  }

  /* Fade-in animation */
  .fade-in {
    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);
  }

  .fade-in.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* Stagger children */
  .fade-in-delay-1 { transition-delay: 0.1s; }
  .fade-in-delay-2 { transition-delay: 0.2s; }
  .fade-in-delay-3 { transition-delay: 0.3s; }
  .fade-in-delay-4 { transition-delay: 0.4s; }

  /* Mobile menu animation */
  #mobileMenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  }

  #mobileMenu.open {
    max-height: 400px;
  }

  /* Hero gradient animation */
  @keyframes float {
    0%, 100% { transform: translateY(0px) scale(1); }
    50% { transform: translateY(-20px) scale(1.05); }
  }

  .hero-blur-1 {
    animation: float 8s ease-in-out infinite;
  }

  .hero-blur-2 {
    animation: float 6s ease-in-out infinite reverse;
  }

  .hero-blur-3 {
    animation: float 10s ease-in-out infinite;
  }

  /* Smooth focus ring for accessibility */
  a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 2px solid #0d9488;
    outline-offset: 2px;
  }

  /* Subtle hover lift on service cards */
  @media (prefers-reduced-motion: no-preference) {
    .service-card {
      will-change: transform;
    }
  }