* {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }

      body {
        background: #fafafa;
        color: #1e1e1e;
        font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
          Roboto, Helvetica, Arial, sans-serif;
        line-height: 1.5;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        min-height: 100vh;
        padding: 2rem 1.5rem;
      }

      .container {
        max-width: 750px;
        width: 100%;
      }

      /* profile image + header row */
      .profile-row {
        display: flex;
        align-items: center;
        gap: 1.5rem;
        flex-wrap: wrap;
        margin-bottom: 1rem;
      }

      .avatar {
        width: 80px;
        height: 80px;
        border-radius: 50%;
        object-fit: cover;
        border: 2px solid #e0e0e0;
        background: #fff;
      }

      .identity h1 {
        font-size: 2.2rem;
        font-weight: 520;
        letter-spacing: -0.02em;
        line-height: 1.2;
      }

      .identity .tagline {
        font-size: 1rem;
        color: #4a4a4a;
      }

      .divider-light {
        border-bottom: 1px solid #ddd;
        padding-bottom: 1.2rem;
        margin-bottom: 2rem;
        width: 100%;
      }

      /* short bio */
      .bio {
        margin-bottom: 2rem;
        font-size: 1rem;
        color: #2c2c2c;
        max-width: 620px;
      }

      .bio p {
        margin-bottom: 0.75rem;
      }

      .bio a {
        color: #111;
        text-decoration: none;
        border-bottom: 1px solid #aaa;
        transition: border 0.2s;
      }

      .bio a:hover {
        border-bottom: 2px solid #111;
      }

      /* three cards grid */
      .card-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1.2rem;
        margin: 2rem 0 2.5rem 0;
      }

      @media (min-width: 500px) {
        .card-grid {
          grid-template-columns: repeat(3, 1fr);
        }
      }

      .card {
        background: #ffffff;
        border: 1px solid #e2e2e2;
        border-radius: 20px;
        padding: 1.5rem 1.2rem;
        transition: all 0.2s ease;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
        text-decoration: none;
        color: inherit;
        display: flex;
        flex-direction: column;
      }

      .card:hover {
        border-color: #a0a0a0;
        box-shadow: 0 10px 22px -10px rgba(0, 0, 0, 0.15);
        background: #ffffff;
        transform: translateY(-3px);
      }

      .card-title {
        font-weight: 600;
        font-size: 1.2rem;
        margin-bottom: 0.4rem;
        letter-spacing: -0.01em;
      }

      .card-desc {
        font-size: 0.85rem;
        color: #5a5a5a;
        margin-bottom: 0.8rem;
        line-height: 1.4;
      }

      .card-link {
        font-size: 0.8rem;
        color: #2e2e2e;
        word-break: break-all;
        border-bottom: 1px dotted #bbb;
        align-self: flex-start;
        margin-top: 0.2rem;
      }

      .card:hover .card-link {
        border-bottom: 1px solid #111;
      }

      /* quote style */
      .quote-block {
        margin: 1.8rem 0 1.2rem 0;
        font-style: italic;
        color: #4f4f4f;
        border-left: 3px solid #ccc;
        padding-left: 1.4rem;
        font-size: 0.95rem;
      }

      /* footer */
      .footer-note {
        margin-top: 3rem;
        font-size: 0.8rem;
        color: #777;
        border-top: 1px solid #eaeaea;
        padding-top: 1.8rem;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
      }

      .linkedin-meta {
        display: inline-flex;
        align-items: center;
        gap: 0.4rem;
      }

      .linkedin-meta a {
        color: #333;
        text-decoration: none;
        border-bottom: 1px solid #ccc;
      }

      .linkedin-meta a:hover {
        border-bottom-color: #111;
      }

      .small-note {
        font-size: 0.85rem;
        color: #6b6b6b;
      }

      .avatar-credit {
        font-size: 0.75rem;
        color: #aaa;
        margin-left: 0.5rem;
      }

      /* Section labels */
      .section-label {
        font-size: 0.85rem;
        text-transform: uppercase;
        letter-spacing: 1px;
        font-weight: 500;
        color: #5b6c7e;
        margin-bottom: 0.75rem;
        padding-left: 0.25rem;
        padding-top: 1.40rem;
      }

      /* Dummy card styling */
      .card.dummy {
        background: #f8fafd;
        border: 1px dashed #b9c7d9;
        cursor: default;
      }

      .card.dummy:hover {
        transform: none;
        border-color: #a0b3c9;
        box-shadow: 0 8px 16px -8px rgba(0, 0, 0, 0.05);
      }

      /* Keep your existing card-grid gap consistent */
      .card-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 1.2rem;
        margin-bottom: 0.5rem;
      }

      .card-links-vertical {
        margin-top: 8px;
        display: flex;
        flex-direction: column;
        gap: 4px;
      }

      .card-links-vertical .card-link {
        display: block;
        font-size: 0.9em;
      }

      .card-links-vertical a:hover {
        opacity: 0.7;
      }

      /* ----- navigation & language ----- */
      .top-bar {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 3rem;
        padding-bottom: 0.8rem;
        border-bottom: 1px solid #e2e2e2;
        font-size: 0.9rem;
      }

      .back-home a {
        color: #6b6b6b;
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        gap: 0.3rem;
      }

      .back-home a:hover {
        color: #1a1a1a;
      }

      /* Styling for about page */
      .seo-article section {
        margin-bottom: 2.5rem;
        color: #374151;
      }

      .seo-article h2 {
        font-size: 1.5rem;
        font-weight: 700;
        margin-bottom: 1rem;
        color: #111827;
        border-left: 4px solid #3b82f6;
        /* Subtle accent line */
        padding-left: 1rem;
      }

      .seo-article h3 {
        font-size: 1.125rem;
        font-weight: 600;
        margin: 1.5rem 0 0.5rem 0;
        color: #1f2937;
      }

      .seo-article p {
        line-height: 1.7;
        margin-bottom: 1.25rem;
        font-size: 1rem;
      }

      /* Cleanup for the last paragraph in a section */
      .seo-article section p:last-child {
        margin-bottom: 0;
      }

      /* Table of Contents (TOC) Styling */
      .toc {
        background-color: #f9fafb;
        border: 1px solid #e5e7eb;
        padding: 1rem 1.5rem;
        margin-bottom: 2rem;
        border-radius: 0.5rem;
      }

      .toc h2 {
        font-size: 1.25rem;
        font-weight: 700;
        margin-bottom: 1rem;
        color: #111827;
        border-bottom: 2px solid #3b82f6;
        padding-bottom: 0.25rem;
      }

      .toc ul {
        list-style: none;
        padding-left: 0;
      }

      .toc ul li {
        margin-bottom: 0.5rem;
      }

      .toc ul li a {
        text-decoration: none;
        color: #2563eb;
        transition: color 0.2s;
      }

      .toc ul li a:hover {
        color: #1d4ed8;
        text-decoration: underline;
      }

      /* Sub-section styling (nested sections) */
      .profile-section section {
        padding-left: 1.25rem;
        border-left: 2px dashed #93c5fd;
        margin-top: 1rem;
      }

      .profile-section section h3 {
        font-size: 1rem;
        font-weight: 600;
        margin-top: 1rem;
        margin-bottom: 0.5rem;
        color: #1e40af;
      }

      /* Divider */
      .divider-light {
        border-bottom: 1px solid #e5e7eb;
        margin: 2rem 0;
      }

      /* Floating Action Button to scroll TOC */
      .fab-scroll-toc {
        position: fixed;
        bottom: 1.5rem;
        right: 1.5rem;
        width: 50px;
        height: 50px;
        border-radius: 50%;
        border: none;
        background-color: #3b82f6;
        color: #fff;
        font-size: 1.5rem;
        cursor: pointer;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
        transition: background 0.2s, transform 0.2s;
        z-index: 999;
      }

      .fab-scroll-toc:hover {
        background-color: #2563eb;
        transform: translateY(-2px);
      }

      /* Highlight active TOC link */
      .toc a.active {
        font-weight: 600;
        text-decoration: underline;
        color: #1d4ed8;
      }