/* ==========================================================================
       MEDEDU LEK — SYSTEM TOKENS (LIGHT & DARK FIRST-CLASS THEMES)
       ========================================================================== */



    /* DARK THEME OVERRIDE */





    /* Base Reset */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--page-bg);
      color: var(--text);
      line-height: var(--line-height-body);
      -webkit-font-smoothing: antialiased;
      padding: 24px 16px 80px;
      transition: background-color 0.25s ease, color 0.25s ease;
    }

    /* Container for the complete specification & showcase */
    .showcase-container {
      max-width: 1400px;
      margin: 0 auto;
    }

    /* Document Header */
    .doc-header {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 24px 28px;
      margin-bottom: 32px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    }

    .doc-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 10px;
      background: var(--surface-raised);
      border: 1px solid var(--border);
      border-radius: var(--radius-control);
      font-size: 11px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--text-muted);
      margin-bottom: 8px;
    }

    .doc-title {
      font-family: var(--font-serif);
      font-size: 28px;
      font-weight: 500;
      color: var(--text);
      letter-spacing: -0.01em;
      line-height: var(--line-height-heading);
    }

    .doc-desc {
      font-size: 14px;
      color: var(--text-muted);
      max-width: 820px;
      margin-top: 6px;
    }

    /* Theme Switcher in doc header */
    .theme-toggle-bar {
      display: flex;
      align-items: center;
      gap: 8px;
      background: var(--surface-raised);
      border: 1px solid var(--border);
      padding: 4px;
      border-radius: var(--radius-control);
    }

    .theme-btn {
      padding: 6px 14px;
      border: none;
      background: transparent;
      color: var(--text-muted);
      font-size: 12px;
      font-weight: 600;
      border-radius: 6px;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 6px;
      transition: all 0.15s ease;
      min-height: 36px;
    }

    .theme-btn.active {
      background: var(--surface);
      color: var(--text);
      box-shadow: 0 1px 2px rgba(0,0,0,0.08);
      border: 1px solid var(--border);
    }

    /* Section Headings */
    .section-title-wrap {
      margin: 40px 0 20px;
      padding-bottom: 12px;
      border-bottom: 1px solid var(--border);
      display: flex;
      justify-content: space-between;
      align-items: baseline;
      flex-wrap: wrap;
      gap: 8px;
    }

    .section-num {
      font-size: 12px;
      font-family: var(--font-mono);
      font-weight: 600;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    .section-heading {
      font-family: var(--font-serif);
      font-size: 22px;
      font-weight: 500;
      color: var(--text);
      margin-top: 2px;
    }

    .section-subtext {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* Grid of Mobile States (390px simulated devices) */
    .mobile-states-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
      gap: 28px;
      margin-bottom: 48px;
    }

    @media (min-width: 1200px) {
      .mobile-states-grid.four-cols {
        grid-template-columns: repeat(4, 1fr);
      }
    }

    /* Device Card Wrapper */
    .device-showcase {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .device-label-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      font-weight: 600;
      color: var(--text-muted);
      padding: 0 4px;
    }

    .device-state-badge {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 10.5px;
      font-family: var(--font-mono);
      font-weight: 500;
      text-transform: uppercase;
    }

    .badge-scored {
      background: var(--success-bg);
      color: var(--success);
      border: 1px solid var(--success-border);
    }

    .badge-partial {
      background: var(--accent-soft);
      color: var(--accent);
      border: 1px solid var(--accent-border);
    }

    .badge-unscorable {
      background: var(--surface-raised);
      color: var(--text-muted);
      border: 1px solid var(--border);
    }

    .badge-abandoned {
      background: var(--warning-bg);
      color: var(--warning);
      border: 1px solid var(--warning-border);
    }

    .badge-error {
      background: var(--danger-bg);
      color: var(--danger);
      border: 1px solid var(--danger-border);
    }

    /* 390px Mobile Viewport Frame */
    .mobile-frame {
      width: 100%;
      max-width: 390px;
      min-height: 820px;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 28px;
      box-shadow: 0 16px 36px -8px rgba(0, 0, 0, 0.08);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      position: relative;
      margin: 0 auto;
      transition: background-color 0.25s ease, border-color 0.25s ease;
    }

    /* Phone Status Bar */
    .mobile-status-bar {
      height: 44px;
      padding: 0 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      font-weight: 600;
      color: var(--text-muted);
      border-bottom: 1px solid transparent;
      flex-shrink: 0;
    }

    /* App Shell Collapsing Top Bar in Session Result */
    .app-top-bar {
      padding: 10px 16px 12px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-subtle);
      background: var(--bg);
      flex-shrink: 0;
    }

    .top-bar-brand {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .brand-mark {
      width: 24px;
      height: 24px;
      background: var(--accent);
      color: var(--accent-contrast);
      font-weight: 700;
      font-size: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 6px;
      font-family: var(--font-sans);
    }

    .brand-text-block {
      display: flex;
      flex-direction: column;
    }

    .brand-title {
      font-size: 12px;
      font-weight: 700;
      color: var(--text);
      line-height: 1.1;
      letter-spacing: -0.01em;
    }

    .brand-subtitle {
      font-size: 9px;
      color: var(--text-soft);
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    .top-bar-actions {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .icon-btn-quiet {
      width: 36px;
      height: 36px;
      min-width: 36px;
      min-height: 36px;
      border-radius: var(--radius-control);
      border: 1px solid var(--border);
      background: var(--surface);
      color: var(--text-muted);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      text-decoration: none;
    }

    .icon-btn-quiet:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }

    /* Screen Scrollable Inner Content */
    .mobile-scroll-body {
      flex: 1;
      overflow-y: auto;
      padding: 18px 16px 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    /* Context Header for Session Result */
    .result-context-header {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .context-meta-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
    }

    .context-discipline-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 11px;
      font-weight: 600;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 0.04em;
    }

    .context-timestamp {
      font-size: 11px;
      font-family: var(--font-mono);
      color: var(--text-soft);
    }

    .result-main-title {
      font-family: var(--font-serif);
      font-size: 24px;
      font-weight: 500;
      color: var(--text);
      line-height: 1.25;
      letter-spacing: -0.01em;
    }

    .result-lead-note {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.45;
    }

    /* CORE METRIC CARD — HONEST, NON-MOTIVATIONAL */
    .result-summary-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 16px;
      display: flex;
      flex-direction: column;
      gap: 14px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
    }

    .summary-title-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 8px;
      border-bottom: 1px solid var(--border-subtle);
    }

    .summary-caption {
      font-size: 11px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: var(--text-soft);
    }

    .summary-state-pill {
      font-size: 11px;
      font-weight: 500;
      padding: 2px 8px;
      border-radius: var(--radius-pill);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 3-Column Honest Metric Matrix */
    .metrics-three-cols {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 8px;
      text-align: left;
    }

    .metric-cell {
      display: flex;
      flex-direction: column;
      gap: 2px;
      padding: 8px 10px;
      background: var(--surface-raised);
      border-radius: var(--radius-control);
      border: 1px solid transparent;
    }

    .metric-cell.cell-correct {
      background: var(--answer-correct-bg);
      border-color: var(--success-border);
    }

    .metric-cell.cell-unscorable {
      background: var(--answer-unknown-bg);
      border-color: var(--answer-unknown-border);
    }

    .metric-cell.cell-wrong {
      background: var(--answer-wrong-bg);
      border-color: var(--danger-border);
    }

    .metric-val {
      font-size: 20px;
      font-weight: 700;
      font-family: var(--font-sans);
      color: var(--text);
      line-height: 1.1;
    }

    .metric-cell.cell-correct .metric-val {
      color: var(--success);
    }

    .metric-cell.cell-unscorable .metric-val {
      color: var(--answer-unknown);
    }

    .metric-cell.cell-wrong .metric-val {
      color: var(--danger);
    }

    .metric-lbl {
      font-size: 11px;
      color: var(--text-muted);
      line-height: 1.2;
    }

    .metric-subtext {
      font-size: 10px;
      color: var(--text-soft);
      margin-top: 1px;
    }

    /* Scored Percentage / Score Summary Line (shown only when scorable) */
    .score-summary-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 10px 12px;
      background: var(--surface-raised);
      border-radius: var(--radius-control);
      border: 1px solid var(--border);
      font-size: 12px;
    }

    .score-label {
      color: var(--text-muted);
      font-weight: 500;
    }

    .score-number {
      font-size: 15px;
      font-weight: 700;
      color: var(--text);
      font-feature-settings: "tnum";
    }

    /* Honest Unscorable Explainer Banner */
    .unscorable-explainer-banner {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      padding: 12px;
      border-radius: var(--radius-control);
      background: var(--surface-raised);
      border: 1px solid var(--border);
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.45;
    }

    .unscorable-icon {
      flex-shrink: 0;
      margin-top: 1px;
      color: var(--answer-unknown);
    }

    /* BREAKDOWN BY QUESTION TYPE (Single, Combination, Except) */
    .breakdown-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 16px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .breakdown-header {
      display: flex;
      flex-direction: column;
      gap: 2px;
    }

    .breakdown-title {
      font-size: 13px;
      font-weight: 700;
      color: var(--text);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .breakdown-subtitle {
      font-size: 11.5px;
      color: var(--text-soft);
    }

    /* Table / List of Question Types */
    .type-breakdown-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .type-item-row {
      display: flex;
      flex-direction: column;
      gap: 6px;
      padding: 10px;
      background: var(--surface-raised);
      border-radius: var(--radius-control);
      border: 1px solid var(--border-subtle);
    }

    .type-item-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
    }

    .type-name-wrap {
      display: flex;
      align-items: center;
      gap: 6px;
      font-weight: 600;
      color: var(--text);
    }

    .type-tag {
      font-size: 10px;
      font-weight: 500;
      padding: 1px 6px;
      border-radius: 4px;
      background: var(--surface);
      border: 1px solid var(--border);
      color: var(--text-muted);
    }

    .type-tag.tag-critical {
      background: var(--warning-bg);
      color: var(--warning);
      border-color: var(--warning-border);
    }

    .type-stat-fraction {
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--text);
      font-weight: 600;
    }

    /* Multi-segment Visual Ratio Bar (4px height) */
    .ratio-bar-track {
      height: 6px;
      background: var(--border-subtle);
      border-radius: 3px;
      overflow: hidden;
      display: flex;
      width: 100%;
    }

    .ratio-segment-correct {
      background: var(--success);
      height: 100%;
    }

    .ratio-segment-wrong {
      background: var(--danger);
      height: 100%;
    }

    .ratio-segment-unknown {
      background: var(--answer-unknown);
      height: 100%;
    }

    .type-legend-row {
      display: flex;
      justify-content: space-between;
      font-size: 11px;
      color: var(--text-muted);
      margin-top: -2px;
    }

    .type-legend-item {
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .legend-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
    }

    /* ACTION SLOTS: REVIEW MISTAKES & START NEXT SET */
    .result-actions-block {
      display: flex;
      flex-direction: column;
      gap: 10px;
      margin-top: 4px;
    }

    /* Interactive Buttons strictly adhering to Token specs */
    .btn-action-primary {
      min-height: 48px;
      width: 100%;
      background: var(--accent);
      color: var(--accent-contrast);
      border: none;
      border-radius: var(--radius-control);
      font-family: var(--font-sans);
      font-size: 14px;
      font-weight: 600;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      cursor: pointer;
      transition: background 0.15s ease;
      text-decoration: none;
    }

    .btn-action-primary:hover {
      filter: brightness(1.08);
    }

    .btn-action-primary:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }

    .btn-action-secondary {
      min-height: 48px;
      width: 100%;
      background: var(--surface);
      color: var(--text);
      border: 1px solid var(--border);
      border-radius: var(--radius-control);
      font-family: var(--font-sans);
      font-size: 14px;
      font-weight: 600;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      cursor: pointer;
      transition: all 0.15s ease;
      text-decoration: none;
    }

    .btn-action-secondary:hover {
      background: var(--surface-raised);
    }

    .btn-action-secondary:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }

    .btn-action-quiet {
      min-height: 44px;
      width: 100%;
      background: transparent;
      color: var(--text-muted);
      border: none;
      font-family: var(--font-sans);
      font-size: 13px;
      font-weight: 500;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
    }

    .btn-action-quiet:hover {
      color: var(--text);
    }

    /* Fixed Bottom Tab Bar (App Shell contract) */
    .mobile-tab-bar {
      height: 58px;
      border-top: 1px solid var(--border);
      background: var(--surface);
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      padding: 0 4px;
      flex-shrink: 0;
    }

    .tab-destination {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 2px;
      color: var(--text-soft);
      text-decoration: none;
      font-size: 10px;
      font-weight: 500;
      cursor: pointer;
      min-height: 48px;
      position: relative;
    }

    .tab-destination.active {
      color: var(--accent);
      font-weight: 600;
    }

    .tab-icon {
      width: 20px;
      height: 20px;
      stroke-width: 1.8;
    }

    /* WIDE SCREEN DESKTOP SHOWCASE (1280px Grid & Sidebar) */
    .desktop-showcase-frame {
      width: 100%;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      box-shadow: 0 8px 30px rgba(0,0,0,0.06);
      overflow: hidden;
      display: flex;
      min-height: 740px;
      margin-bottom: 48px;
    }

    /* 240px Fixed Sidebar */
    .desktop-sidebar {
      width: 240px;
      background: var(--surface);
      border-right: 1px solid var(--border);
      padding: 24px 16px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      flex-shrink: 0;
    }

    .sidebar-top {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .sidebar-brand-block {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 0 8px;
    }

    .sidebar-nav-list {
      display: flex;
      flex-direction: column;
      gap: 4px;
      list-style: none;
    }

    .sidebar-nav-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 10px 12px;
      border-radius: var(--radius-control);
      font-size: 13.5px;
      font-weight: 500;
      color: var(--text-muted);
      text-decoration: none;
      transition: all 0.15s ease;
      min-height: 44px;
    }

    .sidebar-nav-item:hover {
      background: var(--surface-raised);
      color: var(--text);
    }

    .sidebar-nav-item.active {
      background: var(--accent-soft);
      color: var(--accent);
      font-weight: 600;
      border: 1px solid var(--accent-border);
    }

    .sidebar-bottom {
      display: flex;
      flex-direction: column;
      gap: 16px;
      padding-top: 16px;
      border-top: 1px solid var(--border-subtle);
    }

    .sidebar-user-pill {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 8px 10px;
      background: var(--surface-raised);
      border-radius: var(--radius-control);
      font-size: 12px;
      color: var(--text);
    }

    .user-avatar-initials {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--accent);
      color: var(--accent-contrast);
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 11px;
    }

    /* Desktop Main Content Canvas (Max 1120px, Centered) */
    .desktop-main-canvas {
      flex: 1;
      overflow-y: auto;
      padding: 36px 48px;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .desktop-centered-column {
      width: 100%;
      max-width: 980px;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    /* Desktop 2-Column Grid for Session Result */
    .desktop-result-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 24px;
      align-items: start;
    }

    /* Skeleton Loading State Helper Classes */
    .skeleton-box {
      background: linear-gradient(90deg, var(--surface-raised) 25%, var(--border-subtle) 50%, var(--surface-raised) 75%);
      background-size: 200% 100%;
      animation: shimmer 1.8s infinite;
      border-radius: 6px;
    }

    @keyframes shimmer {
      0% { background-position: 200% 0; }
      100% { background-position: -200% 0; }
    }

    @media (prefers-reduced-motion: reduce) {
      .skeleton-box {
        animation: none;
        background: var(--surface-raised);
      }
    }

    /* Specification Analysis Matrix Table */
    .spec-table-wrap {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      overflow-x: auto;
      margin-bottom: 40px;
    }

    .spec-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 13px;
      text-align: left;
    }

    .spec-table th {
      background: var(--surface-raised);
      padding: 12px 16px;
      font-weight: 600;
      color: var(--text);
      border-bottom: 1px solid var(--border);
      font-size: 12px;
      text-transform: uppercase;
      letter-spacing: 0.04em;
    }

    .spec-table td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--border-subtle);
      color: var(--text-muted);
      vertical-align: top;
    }

    .spec-table tr:last-child td {
      border-bottom: none;
    }

    .spec-table strong {
      color: var(--text);
    }