/* ==========================================================================
   EDISON — Responsive Design (Part 10)
   ========================================================================== */

/* ---------------------------------------------------------------------------
   Ultra-Wide Viewports (>= 1536px)
   --------------------------------------------------------------------------- */
@media (min-width: 1536px) {
  .main-stage {
    margin-left: calc(var(--sidebar-width-expanded) + (100vw - var(--sidebar-width-expanded) - var(--stage-max-width)) / 2);
    margin-right: auto;
    padding: var(--space-8);
  }
}

/* ---------------------------------------------------------------------------
   Tablet & Narrow Desktop (768px to 1279px)
   --------------------------------------------------------------------------- */
@media (max-width: 1279px) and (min-width: 768px) {
  :root {
    --sidebar-width-expanded: var(--sidebar-width-collapsed);
  }

  .app-sidebar {
    width: var(--sidebar-width-collapsed);
    padding: var(--space-4) var(--space-2);
    align-items: center;
  }

  .command-bar {
    padding: 0 var(--space-4);
  }

  .command-bar-profile-meta,
  .demo-pill-btn span {
    display: none;
  }

  .command-bar-right {
    gap: var(--space-2);
  }

  .search-container {
    width: min(280px, 34vw);
  }

  .nav-label,
  .nav-badge,
  .sidebar-pulse-card {
    display: none !important;
  }

  .sidebar-nav-link {
    justify-content: center;
    padding: var(--space-3);
  }

  .main-stage {
    margin-left: var(--sidebar-width-collapsed);
    padding: var(--space-5);
  }

  .hero-section {
    grid-template-columns: 55% 45%;
  }

  .central-viz-section {
    grid-template-columns: 60% 40%;
  }

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

/* ---------------------------------------------------------------------------
   Mobile Viewports (< 768px)
   --------------------------------------------------------------------------- */
@media (max-width: 767px) {
  .command-bar {
    padding: 0 var(--space-3);
    gap: var(--space-2);
  }

  .command-bar-left,
  .command-bar-right {
    gap: var(--space-1);
  }

  .command-bar-center {
    flex: 0 0 auto;
    order: 0;
  }

  .command-bar-left {
    min-width: 0;
  }

  .brand-name {
    font-size: var(--text-sm);
  }

  .command-bar-profile-meta,
  .demo-pill-btn span {
    display: none;
  }

  .quick-action-cluster {
    gap: 0;
  }

  .quick-action-cluster .btn-icon {
    border-color: transparent;
    background: transparent;
  }

  .search-container {
    width: auto;
  }

  .search-input {
    display: none;
  }

  .search-shortcut {
    display: none;
  }

  .search-icon-btn {
    display: inline-flex !important;
  }

  .command-bar.mobile-search-open .command-bar-center {
    position: absolute;
    left: var(--space-3);
    right: var(--space-3);
    z-index: 2;
  }

  .command-bar.mobile-search-open .search-container {
    width: 100%;
  }

  .command-bar.mobile-search-open .search-input {
    display: block;
  }

  .command-bar.mobile-search-open .search-icon-btn {
    display: none !important;
  }

  .brand-chip {
    display: none;
  }

  /* Bottom Tab Bar replaces Sidebar */
  .app-sidebar {
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 60px;
    flex-direction: row;
    padding: 0 var(--space-2);
    border-top: var(--border-hairline);
    border-right: none;
    background: var(--canvas-pearl);
    box-shadow: 0 -2px 10px rgba(11, 18, 32, 0.05);
    overflow: visible;
  }

  .sidebar-nav-list {
    flex-direction: row;
    justify-content: space-around;
    width: 100%;
    gap: 0;
    flex: 1;
  }

  .sidebar-nav-link {
    flex-direction: column;
    gap: 2px;
    padding: 6px;
    font-size: 10px;
  }

  .sidebar-nav-link .nav-icon {
    width: 20px;
    height: 20px;
  }

  .sidebar-nav-link.active::before {
    top: auto;
    bottom: 0;
    left: 10px;
    right: 10px;
    width: auto;
    height: 2px;
    border-radius: var(--radius-xs);
  }

  .sidebar-nav-item:nth-child(n+6) {
    display: none;
  }

  .sidebar-more-wrap {
    display: block;
    flex: 0 0 52px;
  }

  .sidebar-more-toggle {
    flex-direction: column;
    justify-content: center;
    gap: 2px;
    height: 60px;
    min-height: 60px;
    padding: 6px 2px;
    font-size: 10px;
  }

  .sidebar-more-toggle .nav-icon {
    width: 20px;
    height: 20px;
  }

  .sidebar-more-menu {
    right: var(--space-2);
    bottom: calc(100% + var(--space-2));
  }

  .sidebar-more-link {
    flex-direction: row;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
  }

  .sidebar-more-link .nav-icon {
    width: 18px;
    height: 18px;
  }

  .sidebar-pulse-card {
    display: none !important;
  }

  /* Main Stage on Mobile */
  .app-body {
    margin-bottom: 60px;
  }

  .main-stage {
    margin-left: 0;
    padding: var(--space-4);
    gap: var(--space-6);
  }

  .hero-section {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: var(--space-4);
  }

  .hero-left {
    padding-right: 0;
  }

  .hero-right {
    display: none; /* Hide data stream ribbon on compact mobile */
  }

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

  .trajectory-controls {
    align-items: flex-end;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .chart-panel-primary .panel-header {
    height: auto;
    min-height: 48px;
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
    align-items: flex-start;
  }

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

  .achievement-grid {
    gap: var(--space-2);
  }

  .central-viz-section {
    grid-template-columns: 1fr;
  }

  .workspace-insights-section {
    grid-template-columns: 1fr;
  }

  .lower-dashboard-grid {
    grid-template-columns: 1fr;
  }

  .planner-row {
    grid-template-columns: 1fr auto !important;
  }

  .planner-row > div:first-child {
    grid-column: 1 / -1;
  }

  .status-bar {
    display: none; /* Hidden on mobile to preserve screen space */
  }

  /* Touch Target minimum 44px */
  button, .btn, .sidebar-nav-link, .tab-btn {
    min-height: 44px;
  }
}

/* ---------------------------------------------------------------------------
   Core Analytics Route Adaptation (Part 6)
   --------------------------------------------------------------------------- */
@media (max-width: 1100px) {
  .analytics-kpi-grid,
  .subject-kpi-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .performance-primary-grid,
  .attendance-primary-grid,
  .subject-detail-primary {
    grid-template-columns: 1fr;
  }

  .period-metric-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 767px) {
  .analytics-view-header h2 {
    font-size: 1.5rem;
  }

  .analytics-kpi-grid,
  .subject-kpi-grid,
  .performance-secondary-grid,
  .attendance-secondary-grid,
  .subject-detail-secondary,
  .progress-primary-grid {
    grid-template-columns: 1fr;
  }

  .analytics-kpi {
    min-height: 112px;
  }

  .analytics-route-chart {
    overflow-x: auto;
  }

  .analytics-route-chart .chart-svg {
    min-width: 460px;
  }

  .analytics-control-stack {
    justify-content: flex-start;
  }

  .analytics-chart-panel .panel-header,
  .analytics-subject-panel .panel-header,
  .period-comparison-panel .panel-header {
    height: auto;
    min-height: 48px;
    align-items: flex-start;
    flex-wrap: wrap;
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
  }

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

  .period-comparison-panel .panel-body {
    padding: var(--space-3);
  }

  .attendance-risk-banner,
  .analytics-risk-banner {
    align-items: flex-start;
    flex-direction: column;
  }

  .attendance-calendar-grid {
    gap: 4px;
  }

  .attendance-cell {
    min-height: 48px;
    padding: 5px;
  }

  .attendance-cell small {
    font-size: 8px;
  }

  .syllabus-topic-row {
    grid-template-columns: 1fr auto;
  }

  .syllabus-topic-row .analytics-bar-track {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .histogram-bars {
    gap: 3px;
  }

  .histogram-bar-label {
    font-size: 8px;
    transform: rotate(-45deg);
    transform-origin: top center;
  }

  .analytics-modal-list-row,
  .analytics-record-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .attendance-action-group {
    justify-content: flex-start;
  }

  .analytics-form-grid {
    grid-template-columns: 1fr;
  }

  .milestone-manager-row {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .milestone-manager-row small {
    grid-column: 2;
  }

  .skill-route-row {
    grid-template-columns: 26px minmax(0, 1fr);
  }

  .skill-route-score {
    grid-column: 2;
    justify-content: space-between;
  }

  .leaderboard-route-row {
    grid-template-columns: 34px minmax(0, 1fr) auto;
  }

  .leaderboard-route-row > span:last-child {
    grid-column: 2 / -1;
    justify-self: start;
  }

  .goal-card-foot {
    align-items: flex-start;
    flex-direction: column;
  }
}