0px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        box-shadow: var(--shadow-medium);
        border: 1px solid var(--glass-border);
        transition: var(--transition-smooth);
      }

      .testimonial-front {
        background: var(--bg-tertiary);
        color: var(--text-primary);
      }

      .testimonial-back {
        background-color: var(--bg-quaternary);
        color: var(--text-secondary);
        transform: rot