/* ========== Mobile (< 768px) ========== */
@media (max-width: 767px) {

  /* Navigation: mobile slide-in menu */
  .nav__links {
    position: fixed;
    top: 0;
    right: 0;
    width: 70vw;
    max-width: 300px;
    height: 100vh;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(4, 11, 20, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    gap: var(--space-lg);
    z-index: 999;
  }

  .nav__links--open {
    transform: translateX(0);
  }

  .nav__link {
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0.4rem 1.5rem;
  }

  .nav__toggle {
    display: flex;
  }

  /* Prevent scrolling when menu is open */
  body.menu-open {
    overflow: hidden;
  }

  /* Hero */
  .hero__card {
    padding: var(--space-lg) var(--space-md);
    margin: 0 var(--space-xs);
  }

  /* Sections */
  .section {
    padding: var(--space-lg) 0;
  }

  .container {
    padding: 0 var(--space-sm);
  }

  /* Page header */
  .page-header {
    min-height: 20vh;
    padding-top: calc(var(--nav-height) + var(--space-lg));
    padding-bottom: var(--space-lg);
  }

  /* Publication cards */
  .publication-card {
    padding: var(--space-md);
  }

  .publication-card__header {
    margin-bottom: var(--space-xs);
  }

  /* Project grid */
  .project-grid {
    grid-template-columns: 1fr;
  }

  /* Teaching grid */
  .teaching-grid {
    grid-template-columns: 1fr;
  }

  /* CV entries */
  .cv-entry__header {
    flex-direction: column;
    gap: 0.2rem;
  }

  .cv-section {
    padding: var(--space-md);
  }

  /* CV accent border: move to top on mobile */
  .glass--accent-left::before {
    width: 100%;
    height: 3px;
    background: linear-gradient(to right, var(--gradient-1), var(--gradient-2));
  }

  /* About */
  .about {
    padding: var(--space-md) !important;
  }
}

/* ========== Tablet (768px - 1023px) ========== */
@media (min-width: 768px) and (max-width: 1023px) {

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

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

/* ========== Desktop (1024px+) ========== */
@media (min-width: 1024px) {

  .project-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }

  .teaching-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  }
}