@media (max-width: 640px) {
      article[data-testid="test-profile-card"] {
        grid-template-columns: 1fr;
        box-shadow: 4px 4px 0 var(--ink);
      }
 
      .card-left {
        padding: 2rem 1.5rem;
        align-items: center;
        text-align: center;
      }
 
      .card-left::before { top: -40px; right: -40px; width: 120px; height: 120px; }
 
      nav[data-testid="test-user-social-links"] ul {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
      }
 
      .card-right {
        border-left: none;
        border-top: 2px solid var(--ink);
        padding: 1.8rem 1.5rem;
      }
 
      .lists-row {
        grid-template-columns: 1fr;
        gap: 1.2rem;
      }
 
      h1[data-testid="test-user-name"] { font-size: 1.35rem; }
    }
 
    @media (min-width: 641px) and (max-width: 860px) {
      article[data-testid="test-profile-card"] {
        grid-template-columns: 210px 1fr;
      }
      .card-left { padding: 2rem 1.4rem; }
    }
 
    /* Focus styles */
    :focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }