.about { padding: 4rem 3rem; }
  .about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; max-width: 960px; margin: 0 auto; }
  .about-title { font-family: var(--font-display); font-size: 1.75rem; font-weight: 700; line-height: 1.2; letter-spacing: -0.015em; margin-bottom: 1.25rem; }
  .about-body { font-size: 0.9375rem; line-height: 1.8; color: var(--text-secondary); margin-bottom: 1rem; }
  .skills-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
  .skill-item { background: var(--surface); border: 1px solid var(--border); border-radius: 4px; padding: 0.75rem 1rem; font-size: 0.8125rem; color: var(--text-secondary); }
  .skill-category { font-size: 0.625rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); margin-bottom: 4px; }

  .contact { padding: 3rem 3rem; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }
  .contact-headline { font-family: var(--font-display); font-size: 2rem; font-weight: 700; line-height: 1.1; letter-spacing: -0.02em; }
  .contact-sub { font-size: 0.875rem; color: var(--text-secondary); margin-top: 0.5rem; }
  .contact-links { display: flex; flex-direction: column; gap: 10px; align-items: flex-end; }
  .contact-link { display: flex; align-items: center; gap: 8px; font-size: 0.875rem; color: var(--text-secondary); text-decoration: none; transition: color 0.2s; }
  .contact-link:hover { color: var(--accent); }
  .contact-link-icon { width: 32px; height: 32px; border-radius: 4px; background: var(--surface); border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: 14px; }

  footer { padding: 1.5rem 3rem; display: flex; justify-content: space-between; align-items: center; }
  footer p { font-size: 0.75rem; color: var(--text-dim); }

  @keyframes fadeUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
  @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
  .reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
  .reveal.visible { opacity: 1; transform: translateY(0); }

  /* ── Hamburger nav ── */
  .nav-hamburger { display: none; flex-direction: column; justify-content: space-between; width: 24px; height: 16px; background: none; border: none; cursor: pointer; padding: 0; }
  .nav-hamburger span { display: block; width: 100%; height: 2px; background: var(--text-primary); border-radius: 2px; transition: transform 0.25s ease, opacity 0.25s ease; }
  .nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-hamburger.open span:nth-child(2) { opacity: 0; }
  .nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  @media (max-width: 768px) {
    nav { padding: 1rem 1.5rem; position: relative; }
    .nav-hamburger { display: flex; }
    .nav-links {
      display: none; flex-direction: column; gap: 0;
      position: absolute; top: 100%; left: 0; right: 0;
      background: rgba(255,255,255,0.98); backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border); padding: 0.5rem 0 1rem; z-index: 99;
    }
    .nav-links.open { display: flex; }
    .nav-links li { padding: 0; }
    .nav-links a { display: block; padding: 0.75rem 1.5rem; font-size: 0.9375rem; text-transform: none; letter-spacing: 0; }

    .hero { padding: 7rem 1.5rem 4rem; }
    .hero-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem 2rem; }
    .hero-cta { flex-wrap: wrap; }
    .work, .about, .contact { padding: 4rem 1.5rem; }
    .project-card { grid-template-columns: 1fr; min-height: unset; } .project-thumb { display: none; }
    .about-grid { grid-template-columns: 1fr; gap: 2rem; }
    .contact { grid-template-columns: 1fr; } .contact-links { align-items: flex-start; }
    .contact-headline { font-size: 1.5rem; }
    .overlay-content { padding: 2rem 1.5rem 6rem; } .overlay-nav { padding: 1rem 1.5rem; }
    .cs-title { font-size: 1.75rem; }
    .cs-h2 { font-size: 1.375rem; }
    .cs-spec-img-wrap { padding: 0.75rem; overflow-x: auto; }
    .cs-spec-img { min-width: 0; }
    footer { flex-direction: column; gap: 8px; text-align: center; }
  }