:root { --g1: #0f172a; --g2: #0ea5a4; --g3: #7c3aed; }

  .animated-bg {
    position: fixed;
    inset: 0;
    z-index: -10;
    background: linear-gradient(120deg, var(--g1), var(--g2), var(--g3));
    background-size: 400% 400%;
    animation: gradientShift 12s ease infinite;
    filter: brightness(0.9);
  }

  @keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }