/* Wave Animation for Play Button */
    @keyframes wave {
      0% {
        box-shadow: 0 0 0 0 rgba(0, 0, 0, 0.4);
      }
      70% {
        box-shadow: 0 0 0 20px rgba(0, 0, 0, 0);
      }
      100% {
        box-shadow: 0 0 0 0 rgba(0, 0, 0, 0);
      }
    }
    .wave {
      animation: wave 2s infinite;
    }