/* Noise overlay */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
    opacity: 0.6;
  }

  /* Smooth scroll */
  html { scroll-behavior: smooth; }

  /* Selection */
  ::selection {
    background: rgba(13, 148, 136, 0.15);
    color: #0f766e;
  }

  /* Animations */
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }

  @keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }

  @keyframes lineGrow {
    from { width: 0; }
    to { width: 4rem; }
  }

  .anim-1 { animation: fadeUp 0.7s ease both; animation-delay: 0.1s; }
  .anim-2 { animation: fadeUp 0.7s ease both; animation-delay: 0.25s; }
  .anim-3 { animation: fadeUp 0.7s ease both; animation-delay: 0.4s; }
  .anim-4 { animation: fadeUp 0.7s ease both; animation-delay: 0.55s; }
  .anim-5 { animation: fadeUp 0.7s ease both; animation-delay: 0.7s; }
  .anim-line { animation: lineGrow 0.8s ease both; animation-delay: 0.3s; }

  /* Hover line effect */
  .hover-line {
    position: relative;
    display: inline;
  }
  .hover-line::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: currentColor;
    transition: width 0.3s ease;
  }
  .hover-line:hover::after {
    width: 100%;
  }

  /* Expertise card hover */
  .expertise-card {
    transition: all 0.4s ease;
  }
  .expertise-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.04);
    border-color: rgba(13, 148, 136, 0.25);
  }

  /* Credential row hover */
  .credential-row {
    transition: all 0.3s ease;
  }
  .credential-row:hover {
    padding-left: 0.75rem;
    background: rgba(13, 148, 136, 0.03);
  }

  /* CTA pulse */
  .cta-btn {
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
  }
  .cta-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.1) 50%, transparent 60%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
  }
  .cta-btn:hover::before {
    transform: translateX(100%);
  }
  .cta-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(13, 148, 136, 0.25);
  }

  /* Lang toggle */
  .lang-btn {
    transition: all 0.2s ease;
  }
  .lang-btn.active {
    color: #0d9488;
    font-weight: 600;
  }

  /* Hamburger */
  .nav-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 60;
  }
  .nav-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: #1a1a1a;
    border-radius: 2px;
    transition: all 0.3s ease;
  }
  .nav-hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-hamburger.open span:nth-child(2) {
    opacity: 0;
  }
  .nav-hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Mobile overlay */
  .mobile-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 49;
    background: rgba(250, 250, 248, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
  }
  .mobile-overlay.open {
    opacity: 1;
    pointer-events: auto;
  }

  @media (max-width: 640px) {
    .nav-desktop { display: none; }
    .nav-hamburger { display: flex; }
    .mobile-overlay { display: flex; }
  }