Shadow animata sotto la card effetto neon

card_mod:
  style: |
    ha-card {
      animation: shadow 10s linear infinite;
    }
    @keyframes shadow {
      0% { box-shadow: -3px -3px 10px 1px rgba(220,221,247,1); }
      20% { box-shadow: 0 -3px 10px 1px rgba(204,255,91,1); }
      40% {box-shadow: 3px 0 10px 1px rgba(220, 221, 247,1); }
      60% { box-shadow: 3px 3px 10px 1px rgba(204,255,91,1); }
      80% { box-shadow: -3px 3px 10px 1px rgba(220, 221, 247,1); }
      100% { box-shadow: -3px -3px 10px 1px rgba(220, 221, 247,1); }
    }