/* ==========================================================================
   AIT SchoolOS — Stylesheet (reset, base, components, responsive)
   Consumes the custom properties declared in tokens.css.
   ========================================================================== */
    /* ==========================================================================
       RESET & BASE TYPOGRAPHY (APPLE HIG STANDARD)
       ========================================================================== */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    html {
      font-family: var(--font-stack);
      font-size: 14px;
      line-height: 1.5;
      color: var(--text-primary);
      background-color: var(--bg-canvas);
      scroll-behavior: smooth;
      text-rendering: optimizeLegibility;
      letter-spacing: -0.011em;
    }

    body {
      overflow-x: hidden;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      background-color: var(--bg-canvas);
      color: var(--text-primary);
    }

    ::selection {
      background: var(--apple-accent-soft);
      color: var(--apple-accent);
    }

    /* Apple Scrollbar Styling */
    ::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }
    ::-webkit-scrollbar-track {
      background: transparent;
    }
    ::-webkit-scrollbar-thumb {
      background: rgba(142, 142, 147, 0.3);
      border-radius: 3px;
      transition: background var(--spring-fast);
    }
    ::-webkit-scrollbar-thumb:hover {
      background: rgba(142, 142, 147, 0.5);
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--spring-fast);
    }

    button, input, select, textarea {
      font-family: inherit;
      font-size: inherit;
      color: inherit;
      border: none;
      background: none;
      outline: none;
    }

    img, svg {
      vertical-align: middle;
      max-width: 100%;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 28px;
      padding-right: 28px;
    }

    /* Section Spacing */
    .section {
      padding: 100px 0;
      position: relative;
    }
    .section-sm {
      padding: 56px 0;
    }

    .section-header {
      max-width: 820px;
      margin-bottom: 56px;
    }
    .section-header.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    /* Apple-style Capsule Eyebrow Tag */
    .eyebrow-capsule {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 5px 13px;
      border-radius: var(--radius-pill);
      background: var(--apple-accent-soft);
      color: var(--apple-accent);
      font-size: 11px;
      font-weight: 600;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      margin-bottom: 16px;
      border: 1px solid var(--border-subtle);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      transition: all var(--spring-fast);
    }
    .eyebrow-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background-color: var(--apple-accent);
      box-shadow: 0 0 8px var(--apple-accent-glow);
    }

    .section-title {
      font-family: var(--font-display);
      font-size: clamp(2.2rem, 3.8vw, 3.25rem);
      font-weight: 700;
      line-height: 1.12;
      letter-spacing: -0.035em;
      color: var(--text-primary);
      margin-bottom: 18px;
    }

    .section-subtitle {
      font-size: clamp(1.05rem, 1.3vw, 1.2rem);
      line-height: 1.55;
      color: var(--text-secondary);
      letter-spacing: -0.015em;
      font-weight: 400;
    }

    /* ==========================================================================
       APPLE BUTTONS & INTERACTIVE ELEMENTS
       ========================================================================== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 20px;
      font-size: 13px;
      font-weight: 500;
      letter-spacing: -0.01em;
      border-radius: var(--radius-pill);
      transition: transform var(--spring-fast), background var(--spring-fast), box-shadow var(--spring-fast), border-color var(--spring-fast);
      white-space: nowrap;
      user-select: none;
      cursor: pointer;
    }
    .btn:active {
      transform: scale(0.97);
    }
    .btn-lg {
      padding: 13px 26px;
      font-size: 14px;
      font-weight: 600;
    }
    .btn-primary {
      background: var(--apple-accent);
      color: #FFFFFF;
      box-shadow: 0 2px 10px var(--apple-accent-glow);
      border: 1px solid transparent;
    }
    .btn-primary:hover {
      background: var(--apple-accent);
      box-shadow: 0 4px 18px var(--apple-accent-glow);
      transform: translateY(-1px);
    }
    .btn-secondary {
      background: var(--bg-card);
      color: var(--text-primary);
      border: 1px solid var(--border-subtle);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      box-shadow: var(--shadow-sm);
    }
    .btn-secondary:hover {
      background: var(--bg-card-hover);
      border-color: var(--border-vibrant);
      transform: translateY(-1px);
      box-shadow: var(--shadow-md);
    }

    /* Apple Switch Toggle Component */
    .apple-switch {
      position: relative;
      width: 44px;
      height: 24px;
      background: var(--bg-switch-off);
      border-radius: var(--radius-pill);
      cursor: pointer;
      transition: background var(--spring-normal);
      flex-shrink: 0;
    }
    .apple-switch.active {
      background: var(--apple-emerald);
    }
    .apple-switch-thumb {
      position: absolute;
      top: 2px;
      left: 2px;
      width: 20px;
      height: 20px;
      background: #FFFFFF;
      border-radius: 50%;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.25);
      transition: transform var(--spring-bounce);
    }
    .apple-switch.active .apple-switch-thumb {
      transform: translateX(20px);
    }

    /* Apple Segmented Control Component */
    .segmented-control {
      display: inline-flex;
      align-items: center;
      background: var(--bg-input);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-pill);
      padding: 3px;
      gap: 2px;
      position: relative;
    }
    .segmented-btn {
      padding: 4px 12px;
      font-size: 11px;
      font-weight: 600;
      border-radius: var(--radius-pill);
      color: var(--text-secondary);
      transition: background var(--spring-fast), color var(--spring-fast), box-shadow var(--spring-fast), transform var(--spring-fast);
      position: relative;
      cursor: pointer;
      line-height: 1.2;
    }
    .segmented-btn:hover {
      color: var(--text-primary);
    }
    .segmented-btn.active {
      background: var(--bg-surface-elevated);
      color: var(--text-primary);
      box-shadow: var(--shadow-sm);
    }

    /* Spotlight Quick-Jump Trigger Button */
    .cmd-k-btn {
      display: flex;
      align-items: center;
      gap: 7px;
      height: 32px;
      padding: 0 10px;
      border-radius: var(--radius-pill);
      background: var(--bg-input);
      border: 1px solid var(--border-subtle);
      color: var(--text-secondary);
      font-size: 12px;
      cursor: pointer;
      transition: border var(--spring-fast), color var(--spring-fast), background var(--spring-fast);
    }
    .cmd-k-btn:hover {
      color: var(--text-primary);
      border-color: var(--border-vibrant);
      background: var(--bg-card-hover);
    }
    .cmd-badge {
      font-family: var(--font-mono);
      font-size: 10px;
      padding: 2px 5px;
      border-radius: 4px;
      background: rgba(142, 142, 147, 0.18);
      color: var(--text-secondary);
      font-weight: 600;
    }

        /* ==========================================================================
       1. APPLE HIG TOP NAVIGATION BAR & FLYOUT SYSTEM
       ========================================================================== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 200;
      height: 54px;
      background: var(--bg-surface);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      border-bottom: 1px solid var(--border-subtle);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 2px 10px rgba(0, 0, 0, 0.04);
      transition: background var(--spring-normal), border var(--spring-normal);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }

    /* Brand & Product Indicator */
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      flex-shrink: 0;
    }

    .brand-mark {
      width: 32px;
      height: 32px;
      background: var(--bg-surface-elevated);
      border: 1px solid var(--border-subtle);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
      transition: transform var(--spring-bounce), border-color var(--spring-fast);
      flex-shrink: 0;
      overflow: hidden;
      padding: 3px;
    }
    .brand-logo:hover .brand-mark {
      transform: scale(1.06);
      border-color: var(--apple-accent);
    }
    .brand-logo-img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      display: block;
      border-radius: 4px;
    }

    .brand-text-wrap {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-name {
      font-family: var(--font-display);
      font-size: 14px;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--text-primary);
      white-space: nowrap;
    }
    .brand-version-pill {
      font-size: 10px;
      font-weight: 600;
      padding: 2px 7px;
      border-radius: var(--radius-pill);
      background: var(--bg-input);
      border: 1px solid var(--border-subtle);
      color: var(--text-secondary);
      display: inline-flex;
      align-items: center;
      gap: 5px;
      white-space: nowrap;
    }
    .status-pulse-dot {
      width: 5px;
      height: 5px;
      border-radius: 50%;
      background-color: var(--apple-emerald);
      box-shadow: 0 0 6px var(--apple-emerald);
    }

    /* Desktop Navigation Menu */
    .nav-desktop {
      display: flex;
      align-items: center;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 2px;
      list-style: none;
    }

    .nav-item {
      position: relative;
    }

    .nav-link {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      padding: 6px 12px;
      border-radius: var(--radius-pill);
      font-size: 12px;
      font-weight: 500;
      color: var(--text-secondary);
      letter-spacing: -0.01em;
      transition: background var(--spring-fast), color var(--spring-fast);
      cursor: pointer;
      text-decoration: none;
      white-space: nowrap;
    }
    .nav-link:hover {
      color: var(--text-primary);
      background: var(--bg-input);
    }
    .nav-link.active {
      color: var(--apple-accent);
      background: var(--apple-accent-soft);
      font-weight: 600;
    }
    .dropdown-chevron {
      transition: transform var(--spring-fast);
      opacity: 0.6;
    }
    .nav-item:hover .dropdown-chevron {
      transform: rotate(180deg);
      opacity: 1;
    }

    /* Apple Flyout Dropdown Popover */
    .nav-dropdown-menu {
      position: absolute;
      top: calc(100% + 8px);
      left: 50%;
      transform: translateX(-50%) translateY(-6px);
      min-width: 480px;
      max-width: 90vw;
      padding: 12px;
      background: var(--bg-surface-elevated);
      border: 1px solid var(--border-vibrant);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      opacity: 0;
      pointer-events: none;
      transition: opacity var(--spring-fast), transform var(--spring-fast);
      z-index: 300;
    }
    .nav-dropdown-menu::before {
      content: "";
      position: absolute;
      top: -12px;
      left: 0;
      right: 0;
      height: 12px;
    }
    .nav-item:hover .nav-dropdown-menu {
      opacity: 1;
      pointer-events: auto;
      transform: translateX(-50%) translateY(0);
    }

    .dropdown-grid-2col {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 6px;
    }

    .dropdown-card-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      padding: 10px 12px;
      border-radius: var(--radius-md);
      transition: background var(--spring-fast), transform var(--spring-fast);
      text-decoration: none;
    }
    .dropdown-card-item:hover {
      background: var(--bg-input);
      transform: translateY(-1px);
    }

    .dropdown-item-icon {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .dropdown-item-icon.blue { background: var(--apple-accent-soft); color: var(--apple-accent); }
    .dropdown-item-icon.emerald { background: rgba(48, 209, 88, 0.15); color: var(--apple-emerald); }
    .dropdown-item-icon.purple { background: rgba(191, 90, 242, 0.15); color: var(--apple-purple); }
    .dropdown-item-icon.amber { background: rgba(255, 159, 10, 0.15); color: var(--apple-amber); }

    .dropdown-item-title {
      font-size: 12px;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 2px;
      letter-spacing: -0.01em;
    }
    .dropdown-item-desc {
      font-size: 11px;
      color: var(--text-secondary);
      line-height: 1.35;
    }

    /* Right Action Cluster */
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .btn-nav-cta {
      height: 32px;
      padding: 0 16px;
      font-size: 12px;
      font-weight: 600;
      border-radius: var(--radius-pill);
    }

    /* Mobile Hamburger & Drawer */
    .mobile-menu-toggle {
      display: none;
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: var(--bg-input);
      border: 1px solid var(--border-subtle);
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      padding: 0;
      transition: all var(--spring-fast);
    }
    .mobile-menu-toggle:hover {
      background: var(--bg-card-hover);
      border-color: var(--border-vibrant);
    }
    .hamburger-bar {
      width: 16px;
      height: 1.5px;
      background: var(--text-primary);
      border-radius: 1px;
      transition: transform var(--spring-fast), opacity var(--spring-fast);
    }
    .mobile-menu-toggle.active .hamburger-bar.top {
      transform: translateY(3.25px) rotate(45deg);
    }
    .mobile-menu-toggle.active .hamburger-bar.bottom {
      transform: translateY(-3.25px) rotate(-45deg);
    }

    .mobile-nav-drawer {
      display: none;
      position: absolute;
      top: 100%;
      left: 0;
      right: 0;
      background: var(--bg-surface-elevated);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      border-bottom: 1px solid var(--border-subtle);
      padding: 18px 24px 24px;
      box-shadow: var(--shadow-lg);
      z-index: 150;
      animation: appleFadeIn var(--spring-fast) forwards;
    }
    .mobile-nav-drawer.active {
      display: block;
    }

    .mobile-nav-links {
      display: flex;
      flex-direction: column;
      gap: 4px;
      margin-bottom: 16px;
    }
    .mobile-nav-link {
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 500;
      color: var(--text-primary);
      text-decoration: none;
      transition: background var(--spring-fast);
    }
    .mobile-nav-link:hover {
      background: var(--bg-input);
    }
    .mobile-nav-actions {
      display: flex;
      flex-direction: column;
      gap: 10px;
      padding-top: 12px;
      border-top: 1px solid var(--border-subtle);
    }

    /* ==========================================================================
       SPOTLIGHT / COMMAND PALETTE MODAL (CMD+K)
       Source: requirements/ux/mockup/css/spotlight.css
       ========================================================================== */
    .modal-backdrop {
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.6);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      display: none;
      align-items: flex-start;
      justify-content: center;
      padding-top: 14vh;
      z-index: 500;
      animation: appleFadeIn 180ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
    }
    .modal-backdrop.active {
      display: flex;
    }

    .spotlight-card {
      width: 580px;
      max-width: 92vw;
      background: var(--bg-surface-elevated);
      border: 1px solid var(--border-vibrant);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      animation: scaleIn var(--spring-bounce) forwards;
    }

    .spotlight-input-row {
      display: flex;
      align-items: center;
      padding: 14px 18px;
      gap: 12px;
      border-bottom: 1px solid var(--border-subtle);
    }
    .spotlight-input-row svg {
      width: 18px;
      height: 18px;
      color: var(--text-tertiary);
      flex-shrink: 0;
    }
    .spotlight-input-row input {
      flex: 1;
      font-size: 14px;
      color: var(--text-primary);
    }

    .spotlight-results {
      max-height: 380px;
      overflow-y: auto;
      padding: 8px;
      display: flex;
      flex-direction: column;
      gap: 3px;
    }

    .spotlight-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      color: var(--text-primary);
      transition: background var(--spring-fast), color var(--spring-fast);
    }
    .spotlight-item:hover, .spotlight-item.selected {
      background: var(--apple-accent-soft);
      color: var(--apple-accent);
    }
    .spotlight-item-left {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .spotlight-item-title {
      font-size: 13px;
      font-weight: 500;
    }
    .spotlight-item-sub {
      font-size: 11px;
      color: var(--text-tertiary);
    }

    .spotlight-footer {
      padding: 8px 16px;
      background: var(--bg-input);
      border-top: 1px solid var(--border-subtle);
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 11px;
      color: var(--text-tertiary);
    }

    @keyframes scaleIn {
      from { opacity: 0; transform: scale(0.96); }
      to { opacity: 1; transform: scale(1); }
    }

    /* ==========================================================================
       2. HERO SECTION & STUDIO DISPLAY SHOWCASE
       ========================================================================== */
    .hero-section {
      padding: 64px 0 96px;
      position: relative;
      overflow: hidden;
    }

    .hero-ambient-glow {
      position: absolute;
      top: -120px;
      left: 50%;
      transform: translateX(-50%);
      width: 1000px;
      height: 480px;
      background: radial-gradient(ellipse at center, rgba(10, 132, 255, 0.14) 0%, transparent 68%);
      pointer-events: none;
      z-index: 0;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1.08fr;
      gap: 52px;
      align-items: center;
      position: relative;
      z-index: 1;
    }

    .hero-content {
      max-width: 560px;
    }

    .hero-title {
      font-family: var(--font-display);
      font-size: clamp(2.4rem, 4.2vw, 3.6rem);
      font-weight: 700;
      line-height: 1.08;
      letter-spacing: -0.04em;
      margin-bottom: 20px;
      color: var(--text-primary);
    }

    /* Pure Institutional Blue for All-in-One (Apple Standard, No AI Gradient) */
    .hero-title .gradient-text,
    .hero-title .highlight-blue {
      color: #0066CC;
      background: none;
      -webkit-background-clip: initial;
      -webkit-text-fill-color: initial;
      font-weight: 700;
    }

    [data-theme="dark"] .hero-title .gradient-text,
    [data-theme="dark"] .hero-title .highlight-blue {
      color: #2997FF;
      background: none;
      -webkit-background-clip: initial;
      -webkit-text-fill-color: initial;
    }

    .hero-desc {
      font-size: 1.15rem;
      line-height: 1.55;
      color: var(--text-secondary);
      letter-spacing: -0.015em;
      margin-bottom: 32px;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 36px;
    }

    .hero-trust-bar {
      display: flex;
      align-items: center;
      gap: 20px;
      padding-top: 24px;
      border-top: 1px solid var(--border-subtle);
    }

    .trust-chip {
      display: flex;
      align-items: center;
      gap: 7px;
      font-size: 12px;
      font-weight: 500;
      color: var(--text-secondary);
      letter-spacing: -0.01em;
    }
    .trust-chip svg {
      color: var(--apple-emerald);
      flex-shrink: 0;
    }

    /* ==========================================================================
       STUDIO DISPLAY 3-TIER WINDOW (DERIVED DIRECTLY FROM MOCKUP)
       ========================================================================== */
    .studio-window-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-vibrant);
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-window);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      overflow: hidden;
      position: relative;
      transition: transform var(--spring-smooth), box-shadow var(--spring-smooth);
    }
    .studio-window-card:hover {
      box-shadow: var(--shadow-window), 0 0 32px var(--apple-accent-glow);
      transform: translateY(-2px);
    }

    .window-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 42px;
      padding: 0 16px;
      background: var(--bg-rail);
      border-bottom: 1px solid var(--border-subtle);
    }

    .traffic-lights {
      display: flex;
      gap: 7px;
    }
    .traffic-dot {
      width: 11px;
      height: 11px;
      border-radius: 50%;
      position: relative;
    }
    .traffic-dot.close { background-color: #FF5F56; border: 0.5px solid rgba(0,0,0,0.12); }
    .traffic-dot.minimize { background-color: #FFBD2E; border: 0.5px solid rgba(0,0,0,0.12); }
    .traffic-dot.maximize { background-color: #27C93F; border: 0.5px solid rgba(0,0,0,0.12); }

    .window-title-capsule {
      font-size: 11px;
      font-weight: 600;
      color: var(--text-secondary);
      background: var(--bg-input);
      padding: 3px 12px;
      border-radius: var(--radius-pill);
      border: 1px solid var(--border-subtle);
      display: flex;
      align-items: center;
      gap: 6px;
      letter-spacing: -0.01em;
    }

    .window-status-pill {
      font-size: 10px;
      font-weight: 700;
      padding: 2px 7px;
      border-radius: var(--radius-pill);
      background: var(--apple-emerald-soft, rgba(48, 209, 88, 0.15));
      color: var(--apple-emerald);
      letter-spacing: 0.02em;
    }

    /* 3-Tier Visual Shell inside Hero Window */
    .mockup-shell {
      display: flex;
      height: 380px;
      background: var(--bg-canvas);
      overflow: hidden;
    }

    /* Tier 1 Mini Rail */
    .mini-rail {
      width: 44px;
      height: 100%;
      background: var(--bg-rail);
      border-right: 1px solid var(--border-subtle);
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 8px 0;
      gap: 6px;
      flex-shrink: 0;
    }
    .mini-rail-brand {
      width: 28px;
      height: 28px;
      border-radius: 8px;
      background: linear-gradient(135deg, var(--apple-accent) 0%, #0051A8 100%);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 12px;
      margin-bottom: 4px;
    }
    .mini-rail-item {
      width: 28px;
      height: 28px;
      border-radius: 7px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-secondary);
      cursor: pointer;
      transition: all var(--spring-fast);
    }
    .mini-rail-item:hover {
      background: rgba(255, 255, 255, 0.08);
      color: var(--text-primary);
    }
    .mini-rail-item.active {
      background: var(--apple-accent);
      color: #FFFFFF;
      box-shadow: 0 2px 8px var(--apple-accent-glow);
    }
    .mini-rail-item.hero-chat {
      background: var(--apple-accent-soft);
      border: 1px solid var(--border-vibrant);
      color: var(--apple-accent);
    }

    /* Tier 2 Mini Sidebar */
    .mini-sidebar {
      width: 170px;
      height: 100%;
      background: var(--bg-sidebar);
      border-right: 1px solid var(--border-subtle);
      display: flex;
      flex-direction: column;
      padding: 10px 8px;
      gap: 8px;
      flex-shrink: 0;
    }
    .mini-sidebar-header {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 11px;
      font-weight: 600;
      color: var(--text-primary);
      padding: 2px 4px 6px;
      border-bottom: 1px solid var(--border-subtle);
    }
    .mini-nav-item {
      display: flex;
      align-items: center;
      gap: 6px;
      padding: 5px 8px;
      border-radius: var(--radius-sm);
      font-size: 11px;
      color: var(--text-secondary);
      cursor: pointer;
      transition: all var(--spring-fast);
    }
    .mini-nav-item:hover {
      background: rgba(255, 255, 255, 0.05);
      color: var(--text-primary);
    }
    .mini-nav-item.active {
      background: var(--apple-accent-soft);
      color: var(--apple-accent);
      font-weight: 600;
    }

    /* Tier 3 Mini Canvas */
    .mini-canvas {
      flex: 1;
      height: 100%;
      background: var(--bg-canvas);
      display: flex;
      flex-direction: column;
      overflow-y: auto;
    }
    .mini-topbar {
      height: 38px;
      padding: 0 14px;
      border-bottom: 1px solid var(--border-subtle);
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: var(--bg-surface);
      flex-shrink: 0;
    }
    .mini-breadcrumbs {
      font-size: 11px;
      color: var(--text-secondary);
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .mini-canvas-body {
      padding: 14px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      overflow-y: auto;
    }

    /* Voice Interactive Box inside Hero */
    .voice-bubble-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 12px 14px;
      box-shadow: var(--shadow-sm);
    }
    .voice-author-row {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 6px;
    }
    .voice-siri-orb {
      width: 18px;
      height: 18px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--apple-cyan), var(--apple-blue), #0051A8);
      box-shadow: 0 0 10px var(--apple-blue-glow);
    }
    .voice-prompt-text {
      font-size: 12px;
      color: var(--text-primary);
      line-height: 1.45;
    }

    /* Voice Waveform animation */
    .siri-waveform {
      display: flex;
      align-items: center;
      gap: 3px;
      height: 14px;
      margin-top: 8px;
    }
    .siri-bar {
      width: 3px;
      border-radius: 2px;
      background: var(--apple-accent);
      animation: siriPulse 1.2s ease-in-out infinite alternate;
    }
    .siri-bar:nth-child(1) { height: 5px; animation-delay: 0.1s; }
    .siri-bar:nth-child(2) { height: 13px; animation-delay: 0.3s; }
    .siri-bar:nth-child(3) { height: 9px; animation-delay: 0.15s; }
    .siri-bar:nth-child(4) { height: 14px; animation-delay: 0.4s; }
    .siri-bar:nth-child(5) { height: 7px; animation-delay: 0.2s; }

    @keyframes siriPulse {
      0% { transform: scaleY(0.4); opacity: 0.6; }
      100% { transform: scaleY(1.15); opacity: 1; }
    }

    .apple-touch-btn-row {
      display: flex;
      gap: 6px;
      margin-top: 8px;
    }
    .apple-touch-btn {
      flex: 1;
      height: 34px;
      border-radius: var(--radius-sm);
      background: var(--bg-input);
      border: 1px solid var(--border-subtle);
      font-size: 11px;
      font-weight: 600;
      color: var(--text-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all var(--spring-fast);
      box-shadow: var(--shadow-sm);
      cursor: pointer;
    }
    .apple-touch-btn:hover {
      border-color: var(--apple-accent);
      transform: translateY(-1px);
    }
    .apple-touch-btn.active {
      background: var(--apple-emerald-soft);
      border-color: var(--apple-emerald);
      color: var(--apple-emerald);
    }

    /* Teacher TT27 Assistant Card in Hero */
    .tt27-card-preview {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 12px 14px;
      box-shadow: var(--shadow-sm);
    }
    .tt27-chip-capsules {
      display: flex;
      flex-wrap: wrap;
      gap: 4px;
      margin-top: 6px;
    }
    .tt27-capsule {
      font-size: 10px;
      padding: 2px 7px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      background: var(--apple-emerald-soft);
      color: var(--apple-emerald);
    }

    .window-footer-strip {
      border-top: 1px solid var(--border-subtle);
      padding: 8px 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 11px;
      font-weight: 500;
      color: var(--text-secondary);
      background: var(--bg-rail);
    }

    /* ==========================================================================
       3. PROOF STRIP (APPLE SYSTEM BADGES)
       ========================================================================== */
    .proof-strip {
      padding: 28px 0;
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
      background: var(--bg-surface);
      backdrop-filter: var(--glass-blur);
    }

    .proof-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 14px;
      align-items: center;
    }

    .proof-item {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 10px 12px;
      border-radius: var(--radius-md);
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      transition: transform var(--spring-fast), border-color var(--spring-fast);
    }
    .proof-item:hover {
      transform: translateY(-2px);
      border-color: var(--border-vibrant);
      box-shadow: var(--shadow-sm);
    }

    .proof-icon {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: var(--apple-accent-soft);
      color: var(--apple-accent);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .proof-label {
      font-size: 12px;
      font-weight: 600;
      color: var(--text-primary);
      letter-spacing: -0.01em;
      line-height: 1.25;
    }
    .proof-sub {
      font-size: 10px;
      color: var(--text-secondary);
      font-weight: 400;
    }

    /* ==========================================================================
       4. FOUR PILLARS (APPLE GLASS TILES)
       ========================================================================== */
    .pillars-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .pillar-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 30px 24px;
      box-shadow: var(--shadow-sm);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      transition: transform var(--spring-normal), box-shadow var(--spring-normal), border-color var(--spring-normal);
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .pillar-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: var(--border-vibrant);
      background: var(--bg-card-hover);
    }

    .pillar-icon-box {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-md);
      background: var(--apple-accent-soft);
      color: var(--apple-accent);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      transition: transform var(--spring-fast);
    }
    .pillar-card:hover .pillar-icon-box {
      transform: scale(1.08);
    }

    .pillar-title {
      font-size: 1.2rem;
      font-weight: 700;
      letter-spacing: -0.025em;
      color: var(--text-primary);
      margin-bottom: 10px;
    }

    .pillar-desc {
      font-size: 13px;
      line-height: 1.55;
      color: var(--text-secondary);
      margin-bottom: 22px;
      flex-grow: 1;
      letter-spacing: -0.01em;
    }

    .pillar-features {
      list-style: none;
      padding-top: 16px;
      border-top: 1px solid var(--border-subtle);
      display: flex;
      flex-direction: column;
      gap: 9px;
    }
    .pillar-feature-item {
      font-size: 12px;
      font-weight: 500;
      color: var(--text-primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .pillar-feature-item svg {
      color: var(--apple-accent);
      flex-shrink: 0;
    }

    /* ==========================================================================
       5. PERSONA & AUDIENCE (APPLE SIDEBAR/TABBED WORKSPACE)
       ========================================================================== */
    .persona-container {
      display: grid;
      grid-template-columns: 290px 1fr;
      gap: 32px;
      align-items: start;
    }

    .persona-sidebar {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 8px;
      display: flex;
      flex-direction: column;
      gap: 5px;
      box-shadow: var(--shadow-sm);
      backdrop-filter: var(--glass-blur);
    }

    .persona-tab-btn {
      width: 100%;
      text-align: left;
      padding: 12px 14px;
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      gap: 12px;
      color: var(--text-secondary);
      transition: all var(--spring-fast);
      cursor: pointer;
    }
    .persona-tab-btn:hover {
      background: var(--bg-input);
      color: var(--text-primary);
    }
    .persona-tab-btn.active {
      background: var(--apple-accent-soft);
      color: var(--apple-accent);
      font-weight: 600;
      border: 1px solid var(--apple-accent-soft);
    }

    .persona-tab-icon {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: var(--bg-input);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      transition: all var(--spring-fast);
    }
    .persona-tab-btn.active .persona-tab-icon {
      background: var(--apple-accent);
      color: #FFFFFF;
      box-shadow: 0 3px 10px var(--apple-accent-glow);
    }

    .persona-tab-text h4 {
      font-size: 13px;
      letter-spacing: -0.015em;
      margin-bottom: 2px;
    }
    .persona-tab-text p {
      font-size: 11px;
      opacity: 0.8;
      font-weight: 400;
    }

    .persona-content-display {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-xl);
      padding: 40px;
      box-shadow: var(--shadow-window);
      backdrop-filter: var(--glass-blur);
      position: relative;
    }

    .persona-panel-view {
      display: none;
    }
    .persona-panel-view.active {
      display: block;
      animation: appleFadeIn var(--spring-normal) forwards;
    }

    @keyframes appleFadeIn {
      from { opacity: 0; transform: translateY(6px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .persona-card-header {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      margin-bottom: 24px;
      padding-bottom: 18px;
      border-bottom: 1px solid var(--border-subtle);
    }
    .persona-headline {
      font-family: var(--font-display);
      font-size: 1.65rem;
      font-weight: 700;
      letter-spacing: -0.03em;
      color: var(--text-primary);
      margin-bottom: 6px;
    }
    .persona-sub {
      font-size: 1rem;
      color: var(--text-secondary);
      line-height: 1.5;
    }

    .persona-grid-content {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      margin-bottom: 24px;
    }

    /* Executive Pulse Metric Card (Apple HIG standard) */
    .persona-metric-box {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 20px;
      transition: transform var(--spring-fast), border-color var(--spring-fast);
      box-shadow: var(--shadow-sm);
    }
    .persona-metric-box:hover {
      transform: translateY(-2px);
      border-color: var(--border-vibrant);
    }
    .persona-metric-num {
      font-family: var(--font-display);
      font-size: 2.2rem;
      font-weight: 700;
      letter-spacing: -0.04em;
      color: var(--apple-accent);
      margin-bottom: 4px;
      font-variant-numeric: tabular-nums;
    }
    .persona-metric-label {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 4px;
    }
    .persona-metric-desc {
      font-size: 12px;
      color: var(--text-secondary);
      line-height: 1.45;
    }

    /* ==========================================================================
       6. CHILD-CENTERED PRIMARY UX (K-5 SPECIALIZED)
       ========================================================================== */
    .child-ux-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .child-ux-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-xl);
      padding: 32px 26px;
      box-shadow: var(--shadow-sm);
      backdrop-filter: var(--glass-blur);
      transition: transform var(--spring-normal), box-shadow var(--spring-normal), border-color var(--spring-normal);
      display: flex;
      flex-direction: column;
    }
    .child-ux-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: var(--border-vibrant);
    }

    .target-band-tag {
      display: inline-block;
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 0.03em;
      text-transform: uppercase;
      padding: 3px 10px;
      border-radius: var(--radius-pill);
      background: var(--bg-input);
      color: var(--text-secondary);
      margin-bottom: 16px;
      border: 1px solid var(--border-subtle);
      width: fit-content;
    }

    .child-ux-title {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: -0.025em;
      color: var(--text-primary);
      margin-bottom: 10px;
    }
    .child-ux-text {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.55;
      margin-bottom: 20px;
      flex-grow: 1;
    }

    .child-interactive-demo {
      background: var(--bg-canvas);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 16px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .touch-target-row {
      display: flex;
      gap: 8px;
    }
    .touch-target-btn {
      flex: 1;
      height: 50px;
      border-radius: var(--radius-md);
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all var(--spring-bounce);
      box-shadow: var(--shadow-sm);
      cursor: pointer;
    }
    .touch-target-btn:hover {
      border-color: var(--apple-accent);
      transform: scale(1.04);
    }
    .touch-target-btn.correct {
      background: var(--apple-emerald-soft);
      border-color: var(--apple-emerald);
      color: var(--apple-emerald);
      transform: scale(1.04);
    }

    /* ==========================================================================
       7. AI AGENTS (LANGGRAPH ORCHESTRATION PIPELINE)
       ========================================================================== */
    .agent-pipeline-box {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-xl);
      padding: 40px;
      box-shadow: var(--shadow-window);
      backdrop-filter: var(--glass-blur);
    }

    .agent-flow-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 14px;
      margin-bottom: 32px;
    }

    .agent-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 22px 16px;
      text-align: center;
      transition: all var(--spring-normal);
    }
    .agent-card:hover {
      border-color: var(--apple-accent);
      transform: translateY(-3px);
      background: var(--bg-card-hover);
      box-shadow: var(--shadow-md);
    }

    .agent-avatar {
      width: 42px;
      height: 42px;
      margin: 0 auto 12px;
      border-radius: var(--radius-md);
      background: var(--apple-accent-soft);
      color: var(--apple-accent);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: transform var(--spring-fast);
    }
    .agent-card:hover .agent-avatar {
      transform: scale(1.1);
    }

    .agent-name {
      font-size: 13px;
      font-weight: 700;
      letter-spacing: -0.015em;
      color: var(--text-primary);
      margin-bottom: 2px;
    }
    .agent-role {
      font-size: 11px;
      color: var(--text-secondary);
      margin-bottom: 10px;
      font-weight: 500;
    }
    .agent-spec {
      font-size: 12px;
      color: var(--text-secondary);
      line-height: 1.4;
    }

    .agent-guardrail-banner {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 22px 26px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }
    .guardrail-info h4 {
      font-size: 1rem;
      font-weight: 700;
      letter-spacing: -0.015em;
      color: var(--text-primary);
      margin-bottom: 4px;
    }
    .guardrail-info p {
      font-size: 13px;
      color: var(--text-secondary);
      max-width: 800px;
    }

    /* ==========================================================================
       8. COMPLIANCE & SOVEREIGN PRIVACY (DECREE 13 & TT27)
       ========================================================================== */
    .compliance-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }

    .compliance-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-xl);
      padding: 36px;
      box-shadow: var(--shadow-sm);
      backdrop-filter: var(--glass-blur);
    }

    .compliance-badge-row {
      display: flex;
      gap: 8px;
      margin-bottom: 16px;
    }

    .legal-badge {
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 0.02em;
      padding: 3px 9px;
      border-radius: var(--radius-pill);
      background: var(--apple-accent-soft);
      color: var(--apple-accent);
      border: 1px solid var(--apple-accent-soft);
    }

    .compliance-title {
      font-family: var(--font-display);
      font-size: 1.45rem;
      font-weight: 700;
      letter-spacing: -0.03em;
      color: var(--text-primary);
      margin-bottom: 12px;
    }

    .compliance-desc {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
      margin-bottom: 22px;
    }

    .compliance-checklist {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 11px;
    }

    .checklist-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 13px;
      color: var(--text-primary);
      line-height: 1.45;
    }
    .checklist-item svg {
      color: var(--apple-emerald);
      margin-top: 2px;
      flex-shrink: 0;
    }

    .sanitizer-box {
      background: var(--bg-canvas);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      padding: 14px 16px;
      font-family: var(--font-mono);
      font-size: 12px;
      margin-top: 20px;
      line-height: 1.55;
    }
    .token-mask {
      background: rgba(255, 159, 10, 0.15);
      color: var(--apple-amber);
      padding: 2px 6px;
      border-radius: 4px;
      font-weight: 600;
    }

    /* ==========================================================================
       9. ENTERPRISE SCHOOL ERP CORE
       ========================================================================== */
    .erp-modules-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .erp-module-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      backdrop-filter: var(--glass-blur);
      transition: all var(--spring-normal);
    }
    .erp-module-card:hover {
      border-color: var(--border-vibrant);
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      background: var(--bg-card-hover);
    }

    .erp-module-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .erp-icon {
      width: 38px;
      height: 38px;
      border-radius: var(--radius-sm);
      background: var(--apple-accent-soft);
      color: var(--apple-accent);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .erp-title {
      font-size: 1.1rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--text-primary);
    }
    .erp-desc {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.5;
    }

    /* ==========================================================================
       10. EDTECH ALLIANCE & LTI 1.3 ADVANTAGE
       ========================================================================== */
    .ecosystem-container {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-xl);
      padding: 44px;
      box-shadow: var(--shadow-window);
      backdrop-filter: var(--glass-blur);
    }

    .partners-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-bottom: 32px;
    }

    .partner-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 20px;
      display: flex;
      flex-direction: column;
      gap: 7px;
      transition: all var(--spring-fast);
    }
    .partner-card:hover {
      border-color: var(--apple-accent);
      transform: translateY(-2px);
    }

    .partner-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .partner-name {
      font-size: 15px;
      font-weight: 700;
      letter-spacing: -0.015em;
      color: var(--text-primary);
    }
    a.partner-name {
      text-decoration: none;
      transition: color var(--spring-fast);
    }
    a.partner-name:hover {
      color: var(--apple-accent);
    }
    .partner-badge {
      font-size: 10px;
      font-weight: 600;
      padding: 2px 7px;
      border-radius: var(--radius-pill);
      background: var(--bg-input);
      color: var(--text-secondary);
    }
    .partner-desc {
      font-size: 12px;
      color: var(--text-secondary);
      line-height: 1.45;
    }

    .lti-callout {
      border-top: 1px solid var(--border-subtle);
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }
    .lti-pill {
      font-size: 11px;
      font-weight: 700;
      padding: 5px 12px;
      background: var(--apple-accent-soft);
      color: var(--apple-accent);
      border-radius: var(--radius-pill);
      border: 1px solid var(--apple-accent-soft);
    }

    /* ==========================================================================
       11. ROI & BUSINESS IMPACT (APPLE PULSE GRID)
       ========================================================================== */
    .roi-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .roi-stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-xl);
      padding: 32px 22px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      backdrop-filter: var(--glass-blur);
      transition: transform var(--spring-normal), border-color var(--spring-normal);
    }
    .roi-stat-card:hover {
      transform: translateY(-3px);
      border-color: var(--border-vibrant);
    }

    .roi-value {
      font-family: var(--font-display);
      font-size: clamp(2.4rem, 3.6vw, 3.2rem);
      font-weight: 800;
      line-height: 1;
      letter-spacing: -0.04em;
      color: var(--apple-accent);
      margin-bottom: 10px;
      font-variant-numeric: tabular-nums;
    }
    .roi-label {
      font-size: 14px;
      font-weight: 700;
      letter-spacing: -0.015em;
      color: var(--text-primary);
      margin-bottom: 6px;
    }
    .roi-sub {
      font-size: 12px;
      color: var(--text-secondary);
      line-height: 1.45;
    }

    /* ==========================================================================
       12. INTERACTIVE DEMO & PRE-SALES WALKTHROUGH
       ========================================================================== */
    .demo-wrapper {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-xl);
      padding: 48px;
      box-shadow: var(--shadow-window);
      backdrop-filter: var(--glass-blur);
    }

    .demo-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .demo-form-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 12px;
      font-weight: 600;
      letter-spacing: -0.01em;
      margin-bottom: 6px;
      color: var(--text-primary);
    }
    .form-input, .form-select {
      width: 100%;
      padding: 10px 14px;
      font-size: 13px;
      font-family: inherit;
      background: var(--bg-input);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      color: var(--text-primary);
      transition: all var(--spring-fast);
    }
    .form-input:focus, .form-select:focus {
      outline: none;
      background: var(--bg-surface-elevated);
      border-color: var(--apple-accent);
      box-shadow: 0 0 0 3px var(--apple-accent-glow);
    }

    .form-notice {
      font-size: 11px;
      color: var(--text-secondary);
      margin-top: 12px;
      line-height: 1.45;
    }

    .demo-screen-box {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 20px;
      min-height: 200px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      box-shadow: var(--shadow-sm);
    }

    /* ==========================================================================
       13. APPLE FOOTER
       ========================================================================== */
    .site-footer {
      background-color: var(--bg-canvas);
      border-top: 1px solid var(--border-subtle);
      padding: 72px 0 32px;
      margin-top: auto;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 56px;
    }

    .footer-brand p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.55;
      margin-top: 14px;
      margin-bottom: 20px;
      max-width: 320px;
    }

    .footer-heading {
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      color: var(--text-primary);
      margin-bottom: 18px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      font-size: 13px;
      color: var(--text-secondary);
      transition: color var(--spring-fast);
    }
    .footer-links a:hover {
      color: var(--apple-accent);
    }

    .footer-bottom {
      border-top: 1px solid var(--border-subtle);
      padding-top: 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 12px;
      color: var(--text-secondary);
    }

    .compliance-badges-footer {
      display: flex;
      gap: 8px;
    }
    .f-badge {
      font-size: 10px;
      padding: 3px 7px;
      border-radius: var(--radius-sm);
      background: var(--bg-input);
      border: 1px solid var(--border-subtle);
      color: var(--text-secondary);
      font-weight: 600;
    }

    .success-alert {
      display: none;
      background: var(--apple-emerald-soft);
      border: 1px solid var(--apple-emerald);
      color: var(--apple-emerald);
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 14px;
    }

    /* ==========================================================================
       RESPONSIVE ADAPTATIONS
       ========================================================================== */
    @media (max-width: 1080px) {
      .hero-grid { grid-template-columns: 1fr; gap: 36px; }
      .proof-grid { grid-template-columns: repeat(3, 1fr); }
      .pillars-grid { grid-template-columns: repeat(2, 1fr); }
      .agent-flow-grid { grid-template-columns: repeat(3, 1fr); }
      .roi-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
    }

    @media (max-width: 980px) {
      .nav-desktop { display: none; }
      .mobile-menu-toggle { display: inline-flex; }
      #headerSpotlightBtn span:not(.cmd-badge) { display: none; }
    }

    @media (max-width: 768px) {
      .section { padding: 60px 0; }
      .proof-grid { grid-template-columns: 1fr 1fr; }
      .persona-container { grid-template-columns: 1fr; }
      .child-ux-grid { grid-template-columns: 1fr; }
      .compliance-grid { grid-template-columns: 1fr; }
      .erp-modules-grid { grid-template-columns: 1fr; }
      .partners-grid { grid-template-columns: 1fr; }
      .agent-flow-grid { grid-template-columns: 1fr; }
      .roi-grid { grid-template-columns: 1fr; }
      .demo-grid { grid-template-columns: 1fr; }
      .demo-wrapper { padding: 28px 18px; }
      .footer-grid { grid-template-columns: 1fr; gap: 28px; }
      .lti-callout { flex-direction: column; align-items: flex-start; }
      .hero-trust-bar { flex-direction: column; align-items: flex-start; gap: 10px; }
      .mockup-shell { height: auto; flex-direction: column; }
      .mini-sidebar { display: none; }
      .mini-rail { width: 100%; height: 38px; flex-direction: row; padding: 0 10px; }
    }