/* ============================================================
   ATTENTION DYNAMICS — Responsive Styles
   ============================================================
   Mobile, tablet, and desktop breakpoint adaptations.
   
   Depends on: all other stylesheets
   ============================================================ */


/* --------------------------------------------------------
   1. TABLET (≤960px)
   -------------------------------------------------------- */

@media (max-width: 960px) {
  .split-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-symbol-wrapper {
    order: -1;
  }

  .diagram-coordinate-overlay {
    top: -5%;
    left: -5%;
    width: 110%;
    height: 110%;
  }

  .research-symbol-diagram {
    max-width: 250px;
  }

  .telemetry-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .header-container {
    padding: 18px 24px;
  }

  /* Telemetry page */
  .system-status-bar {
    flex-wrap: wrap;
  }

  .status-item {
    flex: 1 1 45%;
    border-bottom: var(--border-panel);
  }

  .latency-streams-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .node-health-grid {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }

  .diagnostics-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  /* Research page */
  .research-symbol-hero {
    max-width: 380px;
    padding: var(--space-2xl) var(--space-md);
  }

  .research-domains-grid {
    grid-template-columns: 1fr;
  }

  /* Connection page */
  .inquiry-channels-grid {
    grid-template-columns: 1fr;
  }

  /* Hero stacked lockup — tablet */
  .hero-lockup-stacked {
    width: 280px;
  }

  .hero-brand-display {
    margin-bottom: var(--space-2xl);
  }
}


/* --------------------------------------------------------
   2. MOBILE (≤680px)
   -------------------------------------------------------- */

@media (max-width: 680px) {

  /* Logo size reduction for mobile */
  .logo-mark {
    height: 22px;
  }


  /* Hide header telemetry on small mobile */
  .header-telemetry {
    display: none;
  }

  /* Mobile hamburger */
  .mobile-nav-toggle {
    display: flex;
  }

  #nav-menu {
    position: fixed;
    top: 62px;
    left: 0;
    width: 100%;
    height: 0;
    background-color: var(--color-dark);
    flex-direction: column;
    align-items: flex-start;
    padding: 0 24px;
    gap: 20px;
    overflow: hidden;
    border-bottom: 0 solid rgba(229, 231, 235, 0.03);
    transition: var(--transition-smooth);
    z-index: 99;
  }

  #nav-menu.open {
    height: 290px;
    padding: 24px;
    border-bottom-width: 1px;
  }

  .nav-item {
    font-size: 12px;
  }

  .contact-btn,
  .contact-cta {
    width: 100%;
    text-align: center;
    margin-left: 0 !important;
  }

  /* Section padding */
  section {
    padding: 80px 20px;
  }

  /* Hero */
  .hero-cta {
    flex-direction: column;
    gap: 12px;
    align-items: center;
    width: 100%;
  }

  .hero-cta .btn {
    width: 100%;
    max-width: 280px;
  }

  /* Hero stacked lockup — mobile */
  .hero-lockup-stacked {
    width: 220px;
  }

  .hero-brand-display {
    margin-bottom: var(--space-xl);
  }

  /* Edge cards */
  .edge-grid-cards {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* Papers */
  .paper-header {
    flex-direction: column;
    gap: 6px;
  }

  .paper-date {
    text-align: left;
  }

  .paper-item {
    padding: 20px;
  }

  .paper-actions {
    flex-direction: column;
    gap: 8px;
  }

  .paper-btn {
    width: 100%;
    text-align: center;
  }

  /* Stats */
  .stats-grid {
    grid-template-columns: 1fr;
  }

  /* Terminal */
  .contact-terminal {
    width: 100%;
  }

  .terminal-window {
    padding: 16px;
  }

  /* Footer */
  .footer-container {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .footer-nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
  }

  /* Telemetry page mobile */
  .system-status-bar {
    flex-direction: column;
  }

  .status-item {
    border-right: none;
    border-bottom: var(--border-panel);
    flex: 1 1 100%;
  }

  .status-item:last-child {
    border-bottom: none;
  }

  .node-health-grid {
    grid-template-columns: 1fr;
  }

  .node-map-container {
    padding: var(--space-md);
  }

  /* Research page mobile */
  .research-symbol-hero {
    max-width: 280px;
    padding: var(--space-xl) var(--space-sm);
  }

  .research-domains-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .equation-block {
    padding: var(--space-md);
  }

  .param-row {
    flex-direction: column;
    gap: 4px;
  }

  /* Connection page mobile */
  .inquiry-channels-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}


/* --------------------------------------------------------
   3. ULTRAWIDE (≥1800px)
   -------------------------------------------------------- */

@media (min-width: 1800px) {
  .section-container {
    max-width: 1300px;
  }

  .header-container {
    max-width: 1400px;
  }

  .footer-container {
    max-width: 1400px;
  }
}