@media (max-width: 768px) {
  .nav {
    padding: 0 20px;
  }

  .nav-menu {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 70px; left: 0; right: 0;
    background: rgba(10,8,18,0.98);
    padding: 20px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-burger {
    display: block;
  }

  .header-grid {
    grid-template-columns: 1fr;
  }

  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .edu-grid {
    grid-template-columns: 1fr;
  }

  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .two-col {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}