@media (max-width: 1080px) {
  .nav-menu { position: fixed; top: var(--header-height); right: 0; bottom: 0; width: min(390px, 90vw); flex-direction: column; align-items: stretch; padding: 1.5rem; background: #fff; box-shadow: -18px 20px 40px rgba(8,45,27,.15); transform: translateX(105%); transition: transform .25s ease; overflow-y: auto; }
  .nav-menu.open { transform: translateX(0); }
  .nav-menu > a { padding: 1rem .35rem; border-bottom: 1px solid var(--color-line); }
  .nav-menu > a::after { display: none; }
  .nav-toggle { display: grid; place-items: center; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .focus-strip { grid-template-columns: repeat(3, 1fr); }
  .filter-bar { grid-template-columns: 1.4fr 1fr 1fr auto; }
  .filter-bar .clear-filter { grid-column: 1 / -1; }
  .footer-grid { grid-template-columns: 1.2fr .8fr 1fr; }
  .footer-grid > :last-child { grid-column: 1 / -1; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,.08); }
}

@media (max-width: 820px) {
  .section { padding: 4.5rem 0; }
  .page-banner.home-hero { min-height: 610px; }
  .page-banner::after { background: linear-gradient(90deg, rgba(4,26,15,.94), rgba(5,43,24,.7)); }
  .split-layout, .chair-layout, .objectives-layout, .chair-profile, .contact-layout, .project-detail-grid { grid-template-columns: 1fr; gap: 3rem; }
  .split-heading { grid-template-columns: 1fr; gap: 0; }
  .image-panel { max-width: 650px; }
  .image-accent { left: 1rem; }
  .chair-photo, .chair-profile img { max-width: 470px; }
  .project-grid, .event-list, .focus-grid, .team-grid, .achievement-grid { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .vision-grid { grid-template-columns: 1fr; }
  .vision-card { min-height: auto; }
  .pillars-section .section-heading h2 { white-space: normal; }
  .pillars-section .section-heading p { white-space: normal; }
  .filter-bar { grid-template-columns: 1fr 1fr; }
  .search-field { grid-column: 1 / -1; }
  .cta-inner, .association-inner { align-items: flex-start; flex-direction: column; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 580px) {
  :root { --header-height: 76px; }
  body { font-size: .97rem; }
  .container { width: min(calc(100% - 2rem), var(--container)); }
  .institution-bar { display: none; }
  .main-nav, .nav-shell { min-height: 76px; }
  .brand { min-width: 0; gap: .6rem; }
  .brand img { width: 52px; height: 60px; }
  .brand b { font-size: .78rem; }
  .nav-menu { top: var(--header-height); width: 100%; }
  .page-banner { min-height: 390px; }
  .page-banner.home-hero { min-height: max(610px, calc(100svh - var(--header-height))); }
  .page-banner,
  .project-hero {
    background-color: #123c28;
  }
  .page-banner::before,
  .project-hero::before {
    inset: 0;
    height: auto;
    background-position: center;
    background-size: cover;
    transform: none;
  }
  .page-banner::after,
  .page-banner.home-hero::after,
  .project-hero::after {
    background: linear-gradient(
      90deg,
      rgba(4, 26, 15, .82) 0,
      rgba(5, 43, 24, .58) 58%,
      rgba(4, 26, 15, .36) 100%
    );
  }
  .banner-content { padding-block: 3.5rem; }
  .project-hero {
    min-height: 540px;
    padding: 5rem 0 3.5rem;
  }
  .project-hero h1 { font-size: clamp(2.2rem, 10vw, 3.2rem); }
  .hero-actions { width: 100%; }
  .hero-actions .btn { width: 100%; }
  .services-grid, .services-grid.full, .project-grid, .event-list, .focus-grid, .team-grid, .achievement-grid, .values-grid { grid-template-columns: 1fr; }
  .section-top { align-items: flex-start; flex-direction: column; }
  .section-top .btn { width: 100%; }
  .image-accent { bottom: 2.5rem; width: 120px; padding: .85rem; }
  .focus-strip { grid-template-columns: repeat(2, 1fr); }
  .filter-bar { grid-template-columns: 1fr; }
  .filter-bar > *, .search-field { grid-column: auto; }
  .filter-bar .btn { width: 100%; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .full { grid-column: auto; }
  .gallery-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-grid > :last-child { grid-column: auto; }
  .footer-bottom { flex-direction: column; gap: .2rem; }
  .message-stack { top: 115px; }
}