/* 3D Container Setup */
    .testimonial-image-container {
      position: relative;
      width: 100%;
      height: 380px;
      perspective: 1000px;
    }

    @media (min-width: 640px) {
      .testimonial-image-container {
        height: 420px;
      }
    }

    /* Stacked Image Cards */
    .testimonial-card-img {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      border-radius: 1.5rem;
      transition: all 0.6s cubic-bezier(0.23, 1, 0.32, 1);
      box-shadow: 0 20px 35px -10px rgba(15, 23, 42, 0.25), 0 10px 15px -5px rgba(15, 23, 42, 0.1);
      cursor: pointer;
    }

    /* Word Reveal Animation styling */
    .quote-word {
      display: inline-block;
      margin-right: 0.28rem;
      will-change: transform, opacity, filter;
    }

    /* Smooth glow border for active avatar thumb */
    .avatar-thumb {
      transition: all 0.3s ease;
    }
    .avatar-thumb.active {
      ring-width: 3px;
      box-shadow: 0 0 15px rgba(59, 130, 246, 0.5);
      transform: scale(1.1);
    }