/* ==========================================================================
   RESPONSIVE LAYOUT & BREAKPOINTS
   Desktop-first editorial polish, mobile-first responsive behavior
   320px, 375px, 414px, 768px, 1024px, 1280px, 1440px+
   ========================================================================== */

/* Large Screens (1280px and above) */
@media (min-width: 1280px) {
  .hero-grid {
    grid-template-columns: 2fr 1fr;
  }
}

/* Tablets and Below (max-width: 1024px) */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .hero-secondary-col {
    border-left: none;
    border-top: 1px solid var(--color-border);
    padding-left: 0;
    padding-top: var(--space-xl);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

  .secondary-story-card {
    border-bottom: none;
    padding-bottom: 0;
  }

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

  .editorial-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .article-body-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .article-sidebar-rail {
    max-width: 600px;
    margin: 0 auto;
  }

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

  .footer-brand-col {
    grid-column: span 2;
  }
}

/* Mobile & Small Tablets (max-width: 768px) */
@media (max-width: 768px) {
  :root {
    --container-pad: 1rem;
  }

  /* Utility Bar Mobile Adjustments */
  .header-utility-bar {
    display: none;
  }

  .masthead-logo img, .masthead-logo svg {
    height: 38px;
  }

  .btn-search-trigger .key-hint {
    display: none;
  }

  .btn-subscribe-header {
    display: none;
  }

  .btn-mobile-toggle {
    display: block;
  }

  /* Hide Desktop Nav Bar */
  .header-nav-bar {
    display: none;
  }

  /* Hero Mobile */
  .hero-secondary-col {
    grid-template-columns: 1fr;
  }

  .river-item {
    grid-template-columns: 110px 1fr;
    gap: var(--space-md);
  }

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

  /* Newsletter Box Mobile */
  .newsletter-banner {
    padding: var(--space-2xl) var(--space-md);
  }

  .newsletter-form {
    flex-direction: column;
  }

  .btn-newsletter-submit {
    width: 100%;
  }

  /* Article Page Mobile */
  .article-headline {
    font-size: 1.85rem;
    line-height: 1.15;
  }

  .article-meta-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .article-actions-cluster {
    width: 100%;
    justify-content: space-between;
  }

  .story-nav-bar {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  /* Footer Mobile */
  .footer-top-grid {
    grid-template-columns: 1fr;
  }

  .footer-brand-col {
    grid-column: span 1;
  }

  .footer-bottom-bar {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Small Handsets (320px - 390px) */
@media (max-width: 390px) {
  .masthead-logo img, .masthead-logo svg {
    height: 32px;
  }

  .river-item {
    grid-template-columns: 1fr;
  }

  .river-thumb {
    aspect-ratio: 16 / 9;
  }
}