/* ============================================
   JSONLab - Mobile / Responsive
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

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

  /* Dashboard: hide right sidebar */
  .rightbar {
    display: none;
  }

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

/* Tablet small — sidebar collapses */
@media (max-width: 860px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    box-shadow: none;
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-xl);
  }

  .sidebar-toggle {
    display: inline-flex;
  }

  body.dashboard-body .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: var(--z-header);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    height: 100vh;
  }

  body.dashboard-body .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-xl);
  }

  body.dashboard-body .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--bg-overlay);
    z-index: calc(var(--z-header) - 1);
  }

  body.dashboard-body .sidebar-overlay.open {
    display: block;
  }

  .site-main {
    margin-left: 0;
  }

  body.dashboard-body .site-main {
    margin-left: 0;
  }

  .site-footer {
    margin-left: 0;
  }

  body.tool-page .site-main > .container {
    padding-inline: 0;
  }

  .tool-workspace {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .tool-pane {
    height: 400px;
  }

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

  .hero {
    padding: var(--space-12) 0 var(--space-10);
  }

  .section {
    padding: var(--space-12) 0;
  }


  /* Dashboard mobile */
  .dashboard-hero {
    flex-direction: column;
    gap: var(--space-6);
    padding: var(--space-6) var(--space-4);
  }

  .dashboard-hero-preview {
    width: 100%;
    max-width: 400px;
  }

  .dashboard-hero-features {
    gap: var(--space-4);
    flex-wrap: wrap;
  }

  .dashboard-content {
    padding: var(--space-4) var(--space-4) var(--space-8);
  }


  /* ===== 3-LAYER MOBILE TOPBAR — Layer 1: Nav bar ===== */
  .topnav {
    position: sticky;
    top: 0;
    z-index: 110;
    height: 52px;
    padding: 0 var(--space-3) 0 calc(var(--space-3) + 48px);
    gap: var(--space-2);
    border-bottom: 1px solid var(--border-primary);
  }

  .topnav-search {
    max-width: none;
    flex: 1;
    min-width: 0;
  }

  .topnav-search .kbd-hint {
    display: none;
  }

  /* ===== Layer 2: Tool breadcrumb strip ===== */
  body.tool-page .tool-hero {
    position: sticky;
    top: 52px;
    z-index: 105;
    display: flex;
    flex-direction: row;
    align-items: center;
    flex-wrap: nowrap;
    gap: var(--space-2);
    padding: 0 var(--space-3);
    padding-left: calc(var(--space-3) + 52px);
    min-height: 40px;
    height: 40px;
    overflow: hidden;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
  }

  body.tool-page .tool-hero .breadcrumbs {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: 0.6875rem;
    white-space: nowrap;
    flex-shrink: 0;
    opacity: 0.7;
  }

  body.tool-page .tool-hero h1 {
    font-size: 0.8125rem;
    font-weight: 600;
    border-left: 1px solid var(--border-primary);
    padding-left: var(--space-2);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
  }

  body.tool-page .tool-hero .lead {
    display: none;
  }

  /* ===== Layer 3: Toolbar strip ===== */
  body.tool-page .toolbar {
    position: sticky;
    top: 92px; /* 52px + 40px */
    z-index: 100;
    display: flex;
    flex-direction: row;
    align-items: center;
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-primary);
    min-height: 48px;
  }

  body.tool-page .toolbar::-webkit-scrollbar {
    display: none;
  }

  body.tool-page .toolbar-group {
    flex-shrink: 0;
    border-left: none;
    padding-left: 0;
    margin-left: 0;
  }

  body.tool-page .toolbar-group + .toolbar-group {
    border-left: 1px solid var(--border-primary);
    padding-left: var(--space-2);
    margin-left: 0;
  }

  /* Offset site-main to account for all 3 sticky layers */
  body.tool-page .site-main > .container {
    padding-top: 0;
  }

  .rightbar {
    display: none;
  }
}

/* Mobile */
@media (max-width: 640px) {
  .container {
    padding-inline: var(--space-3);
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .toolbar {
    padding: var(--space-2) var(--space-3);
    gap: var(--space-1);
  }

  .toolbar-group + .toolbar-group {
    padding-left: var(--space-2);
    margin-left: 0;
  }

  .pane-header {
    padding: var(--space-2) var(--space-3);
  }

  .editor-textarea, .editor-output, .json-render, .tree-view, .diff-view {
    font-size: 0.8125rem;
    padding: var(--space-3);
  }

  .options-panel {
    flex-direction: column;
    gap: var(--space-2);
  }

  .toast-container {
    inset: var(--space-3);
    bottom: var(--space-3);
  }

  .toast {
    min-width: 0;
    max-width: 100%;
    border-radius: var(--radius-md);
  }

  .cmd-palette {
    margin: var(--space-3);
    border-radius: var(--radius-xl);
  }

  .cmd-palette-backdrop {
    padding-top: 6vh;
  }

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

  .breadcrumbs {
    font-size: 0.75rem;
  }

  .faq-item summary {
    padding: var(--space-3) var(--space-4);
    font-size: 0.9375rem;
  }

  .faq-item .faq-answer {
    padding: 0 var(--space-4) var(--space-3);
    font-size: 0.875rem;
  }

  .section-header h2 {
    font-size: 1.5rem;
  }

  .hero h1 {
    font-size: 1.875rem;
  }

  .tool-workspace {
    gap: var(--space-2);
  }

  .card, .tool-card {
    border-radius: var(--radius-md);
  }

  .btn {
    border-radius: var(--radius-md);
  }

  .site-main {
    padding-top: 56px;
  }

  /* Dashboard mobile */
  .cat-grid {
    grid-template-columns: 1fr;
  }

  .dashboard-hero-text h1 {
    font-size: 1.5rem;
  }

  .dashboard-hero-preview {
    max-width: 100%;
  }


  /* ===== Layer 1 refinement on small phone ===== */
  .topnav {
    height: 48px;
    padding: 0 var(--space-2) 0 calc(var(--space-2) + 44px);
    gap: var(--space-2);
  }

  .topnav-search {
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-lg);
  }

  .topnav-search input {
    font-size: 0.75rem;
  }

  /* ===== Layer 2 refinement on small phone ===== */
  body.tool-page .tool-hero {
    top: 48px;
    padding-left: calc(var(--space-2) + 44px);
    height: 36px;
    min-height: 36px;
  }

  body.tool-page .tool-hero h1 {
    font-size: 0.75rem;
  }

  /* ===== Layer 3 refinement on small phone ===== */
  body.tool-page .toolbar {
    top: 84px; /* 48px + 36px */
    padding: var(--space-1) var(--space-2);
    min-height: 42px;
    gap: var(--space-1);
  }

  body.tool-page .toolbar .btn {
    padding: 4px var(--space-2);
    font-size: 0.75rem;
  }

  body.tool-page .toolbar .select {
    font-size: 0.6875rem;
    padding: 3px var(--space-2);
  }

  body.dashboard-body .site-footer {
    display: none;
  }
}

/* Mobile small */
@media (max-width: 400px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .stat-block {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .section-header h2 {
    font-size: 1.25rem;
  }
}

/* ===== Touch-friendly adjustments ===== */
@media (hover: none) and (pointer: coarse) {
  .btn {
    min-height: 44px;
  }

  .btn-icon {
    min-width: 44px;
    min-height: 44px;
  }

  .tool-card:hover {
    transform: none;
  }

  [data-tooltip]::after {
    display: none;
  }
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===== High contrast ===== */
@media (prefers-contrast: high) {
  :root {
    --border-primary: currentColor;
  }

  .btn {
    border-width: 2px;
  }
}