/* ==========================================================================
   5th Biosciences Symposium — Responsive overrides
   Breakpoints: tablet <= 1024px, phone <= 640px
   ========================================================================== */

/* ---- Tablet ---- */
@media (max-width: 1024px) {
  .container {
    padding: 0 24px;
  }

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

  .about-grid,
  .venue-card,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .venue-card-map {
    order: -1;
  }

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

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

  .hero-artwork {
    opacity: 0.12;
    width: 460px;
  }

  .form-shell {
    padding: 36px 26px;
  }
}

/* ---- Mobile nav ---- */
@media (max-width: 860px) {
  .nav-toggle {
    display: block;
    z-index: 510;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 24px;
    gap: 8px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
  }

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

  .nav-links a {
    padding: 16px;
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: 1.05rem;
  }

  .nav-cta {
    margin-left: 0;
    margin-top: 10px;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}

/* ---- Phone ---- */
@media (max-width: 640px) {
  .container {
    padding: 0 18px;
  }

  .hero {
    padding: 56px 0 72px;
    text-align: center;
  }

  .hero-inner {
    max-width: 100%;
  }

  .hero-artwork {
    display: none;
  }

  .eyebrow {
    justify-content: center;
  }

  .hero-meta {
    justify-content: center;
  }

  .hero-actions {
    justify-content: center;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .section {
    padding: 60px 0;
  }

  .section-header {
    margin-bottom: 36px;
  }

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

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .form-shell {
    padding: 26px 18px;
    border-radius: var(--radius-md);
  }

  .choice-group {
    flex-direction: column;
  }

  .choice-option label {
    justify-content: center;
    width: 100%;
  }

  .schedule-item {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .venue-card-info {
    padding: 30px 22px;
  }

  .page-header {
    padding: 48px 0 40px;
  }

  .brand-text .brand-sub {
    display: none;
  }
}