/* ---------- Responsive Design ---------- */
/*
 * Mobile-first responsive breakpoints
 * Adjusts layouts for tablet (1200px), mobile (768px), and small mobile (480px)
 */

@media (max-width: 1200px) {
  .container {
    padding: 25px 40px;
  }

  nav {
    padding: 15px 40px;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-left {
    padding-right: 0;
  }

  .hero-images {
    padding-left: 0;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .hero-image {
    height: 180px;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-photo-container {
    padding-top: 0;
    justify-content: center;
  }

  .research-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

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

  nav {
    padding: 10px 15px;
  }

  nav.scrolled {
    padding: 8px 15px;
  }

  nav ul {
    gap: 10px;
    font-size: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  nav ul li {
    margin: 2px 0;
  }

  .nav-logo {
    height: 22px;
    max-width: 120px;
  }

  /* Hide all nav-text on mobile */
  .nav-logo-text {
    display: none;
  }

  .hero {
    padding-top: 70px;
    padding-bottom: 40px;
  }

  .hero-title {
    font-size: 48px !important;
    text-align: center;
    margin-bottom: 20px;
  }

  .department {
    font-size: 13px !important;
  }

  .hero-subtitle {
    font-size: 16px !important;
    text-align: center;
    margin-bottom: 15px;
  }

  .hero-description {
    font-size: 17px !important;
    line-height: 1.6;
    text-align: center;
  }

  .hero-links {
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    font-size: 15px;
  }

  .hero-links a {
    font-size: 15px;
  }

  .section-content {
    padding: 0;
  }

  .section-title {
    font-size: 24px;
    margin-bottom: 20px;
  }

  .hero-images {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .hero-image {
    height: 200px;
  }

  .about-photo {
    max-width: 200px;
  }

  .about-text {
    font-size: 14px;
    line-height: 1.6;
  }

  .members-grid {
    grid-template-columns: 1fr;
    gap: 12px;
    align-items: center;
  }

  .members-row {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
  }

  .members-row.principal-row {
    display: flex;
  }

  .member-card {
    width: 100%;
    max-width: 100%;
  }

  .member-card.principal {
    width: 100%;
    max-width: 100%;
    min-width: auto;
  }

  .member-photo-placeholder {
    width: 40px;
    height: 40px;
  }

  .member-name {
    font-size: 16px;
  }

  .member-role {
    font-size: 14px;
  }

  .publication-item {
    flex-direction: column;
    gap: 10px;
    padding: 15px 0;
  }

  .publication-title {
    font-size: 15px;
  }

  .publication-authors {
    font-size: 13px;
  }

  .publication-journal {
    font-size: 13px;
  }

  .publication-number {
    font-size: 18px;
  }

  .research-section {
    padding: 0;
  }

  .research-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .research-card {
    padding: 20px;
    max-width: 100%;
  }

  .research-image {
    height: 250px;
  }

  .research-title {
    font-size: 17px;
  }

  .research-description {
    font-size: 14px;
  }

  .projects-subtitle {
    font-size: 13px;
  }

  .projects-list li {
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  nav {
    padding: 8px 10px;
  }

  nav.scrolled {
    padding: 6px 10px;
  }

  nav ul {
    gap: 8px;
    font-size: 9px;
    letter-spacing: 0;
  }

  nav a {
    padding: 2px 0;
  }

  .nav-logo {
    height: 20px;
    max-width: 100px;
  }

  .hero {
    padding-top: 60px;
    padding-bottom: 30px;
  }

  .hero-title {
    font-size: 30px !important;
    margin-bottom: 15px;
    margin-top: 40px;
  }

  .hero-subtitle {
    font-size: 12px !important;
    margin-bottom: 12px;
  }

  .hero-description {
    font-size: 15px !important;
    line-height: 1.5;
  }

  .hero-links a {
    font-size: 12px;
    padding: 8px 16px;
  }

  .section-title {
    font-size: 18px;
  }

  .lab-logo {
    max-width: 280px;
  }

  .research-image {
    height: 220px;
  }

  .research-title {
    font-size: 17px;
  }

  .research-description {
    font-size: 13px;
  }

  .publication-item {
    padding: 10px 0;
  }

  .publication-number {
    font-size: 16px;
    min-width: 40px;
  }

  .publication-title {
    font-size: 13px;
  }

  .publication-authors,
  .publication-journal {
    font-size: 11px;
  }

  .publication-links a {
    font-size: 10px;
    padding: 2px 8px;
  }
}