/* ============================================
   RESPONSIVE STYLES
   Mobile-first breakpoints
   ============================================ */

/* --- Mobile: default styles are mobile --- */

/* Small phones */
@media (max-width: 400px) {
  .hub-gallery {
    grid-template-columns: 1fr;
  }

  .hub-card .card-desc {
    display: none;
  }

  .hero h1 {
    font-size: var(--text-3xl);
  }
}

/* --- Tablet (600px+) --- */
@media (min-width: 600px) {
  .hub-gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --- Desktop (900px+) --- */
@media (min-width: 900px) {
  .hub-gallery {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero h1 {
    font-size: var(--text-5xl);
  }
}

/* --- Wide Desktop (1100px+) --- */
@media (min-width: 1100px) {
  .hub-gallery {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* --- Mobile Nav --- */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    padding: var(--space-md);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
  }

  .site-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .site-nav ul {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .site-nav a {
    padding: var(--space-md);
    text-align: center;
  }

  /* Contact grid stacks on mobile */
  .contact-grid {
    grid-template-columns: 1fr;
  }

  /* Card grid single column */
  .card-grid {
    grid-template-columns: 1fr;
  }

  /* About section stacks */
  .about-content {
    flex-direction: column;
    text-align: center;
  }
}