/* ==========================================================================
   RESPONSIVE.CSS — Mobile-first breakpoint system
   Supports 320px–1920px via standardized breakpoints.
   ========================================================================== */

/* --- Layout grid collapse --- */
@media (max-width: 992px) {
  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid--sidebar {
    grid-template-columns: 1fr;
    padding: var(--space-sm);
    gap: var(--space-sm);
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }

  .footer-brand {
    grid-column: 1 / -1;
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .navbar {
    flex-wrap: wrap;
    justify-content: center;
    padding-top: var(--space-sm);
    padding-bottom: var(--space-sm);
  }

  .navbar-logo {
    width: 100%;
    justify-content: center;
  }

  .navbar-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
    order: 3;
    width: 100%;
  }

  .btn-sign-in {
    order: 2;
    margin-left: auto;
  }

  .search-bar {
    flex-direction: column;
    max-width: 100%;
  }

  .search-bar-button {
    padding: 0.85rem;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .hide-below-nav {
    display: none;
  }

  .stack-on-nav {
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .container {
    padding-inline: var(--space-sm);
  }
}

@media (max-width: 480px) {
  .footer-inner {
    grid-template-columns: 1fr;
  }
}

/* --- Visibility utilities --- */
@media (min-width: 769px) {
  .show-below-nav {
    display: none;
  }
}

@media (max-width: 768px) {
  .hide-below-nav {
    display: none;
  }
}

@media (min-width: 993px) {
  .show-below-lg {
    display: none;
  }
}

@media (max-width: 992px) {
  .hide-below-lg {
    display: none;
  }
}