:root {
      /* Obsidian Neon (Dark) */
      --bg: #050810;
      --surface: rgba(10, 15, 30, 0.45);
      --surface2: rgba(18, 24, 45, 0.55);
      --surface3: rgba(25, 32, 58, 0.65);
      --accent: #a78bfa;
      --accent2: #f59e0b;
      --accent3: #10d9a8;
      --accent4: #f43f5e;
      --text: #f8fafc;
      --text2: #94a3b8;
      --text3: #64748b;
      --border: rgba(167, 139, 250, 0.1);
      --border2: rgba(167, 139, 250, 0.15);
      --gold: #f59e0b;
      --green: #10d9a8;
      --red: #f43f5e;
      --blue: #3b82f6;
      --purple: #a78bfa;
      --shadow: 6px 6px 16px rgba(0, 0, 0, 0.6), -4px -4px 12px rgba(255, 255, 255, 0.01);
      --shadow2: 12px 12px 32px rgba(0, 0, 0, 0.7), -8px -8px 24px rgba(255, 255, 255, 0.02);
      --glow: 0 0 24px rgba(167, 139, 250, 0.2);
      --radius: 20px;
      --radius2: 16px;
      --radius3: 12px;
      --sidebar-w: 240px;
      --font: 'Inter', sans-serif;
      --font-head: 'Space Grotesk', sans-serif;
      --font-mono: 'JetBrains Mono', monospace;
    }

    [data-theme="light"] {
      /* Porcelain SaaS (Light) */
      --bg: #eef0f8;
      --surface: rgba(255, 255, 255, 0.92);
      --surface2: rgba(248, 249, 252, 0.95);
      --surface3: #ffffff;
      --text: #0f172a;
      --text2: #334155;
      --text3: #64748b;
      --accent: #4f46e5;
      --border: rgba(99, 102, 241, 0.15);
      --border2: rgba(99, 102, 241, 0.25);
      --green: #059669;
      --red: #dc2626;
      --blue: #2563eb;
      --gold: #d97706;
      --purple: #7c3aed;
      --shadow: 0 4px 20px rgba(99, 102, 241, 0.08), 0 1px 4px rgba(0, 0, 0, 0.06);
      --shadow2: 0 12px 40px rgba(99, 102, 241, 0.12), 0 4px 12px rgba(0, 0, 0, 0.08);
      --glow: 0 0 24px rgba(99, 102, 241, 0.18);
    }

    [data-theme="medium"] {
      /* Graphite Pro (GitHub Inspired) */
      --bg: #0d1117;
      --surface: #161c2d;
      --surface2: #1c2333;
      --surface3: #232d3f;
      --text: #c9d1d9;
      --text2: #8b949e;
      --text3: #6e7681;
      --accent: #22d3ee;
      --border: #30363d;
      --border2: #484f58;
      --green: #4ade80;
      --red: #fb7185;
      --shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
      --shadow2: 0 12px 32px rgba(0, 0, 0, 0.5);
      --glow: 0 0 20px rgba(34, 211, 238, 0.15);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      transition: background-color .25s ease, color .25s ease, border-color .25s ease, transform .25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow .25s ease;
    }

    html,
    body {
      height: 100%
    }

    body {
      font-family: var(--font);
      background: var(--bg);
      background-attachment: fixed;
      color: var(--text);
      min-height: 100vh;
      overflow-x: hidden;
      transition: background 0.4s ease;
    }

    [data-theme="dark"] body {
      background-image: 
        radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(167, 139, 250, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(16, 217, 168, 0.05) 0%, transparent 50%);
    }

    [data-theme="medium"] body {
      background-image: 
        radial-gradient(circle at 0% 0%, rgba(34, 211, 238, 0.05) 0%, transparent 40%);
    }

    [data-theme="light"] body {
      background-image:
        radial-gradient(circle at 15% 10%, rgba(99, 102, 241, 0.08) 0%, transparent 45%),
        radial-gradient(circle at 85% 85%, rgba(124, 58, 237, 0.06) 0%, transparent 45%),
        radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.04) 0%, transparent 60%);
    }

    /* SCROLLBAR */
    ::-webkit-scrollbar {
      width: 6px;
      height: 6px
    }

    ::-webkit-scrollbar-track {
      background: var(--surface)
    }

    ::-webkit-scrollbar-thumb {
      background: var(--border2);
      border-radius: 3px
    }

    ::-webkit-scrollbar-thumb:hover {
      background: var(--accent)
    }

    /* LAYOUT */
    .app-shell {
      display: flex;
      height: 100vh;
      overflow: hidden
    }

    .sidebar {
      width: var(--sidebar-w);
      min-width: var(--sidebar-w);
      height: 100vh;
      background: var(--surface);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-right: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      overflow: hidden;
      position: relative;
      z-index: 100;
      transition: width .3s, min-width .3s;
    }

    .sidebar.collapsed {
      width: 64px;
      min-width: 64px
    }

    .main-area {
      flex: 1;
      display: flex;
      flex-direction: column;
      overflow: hidden
    }

    .topbar {
      height: 60px;
      min-height: 60px;
      background: var(--surface);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      padding: 0 24px;
      gap: 16px;
      z-index: 50;
    }

    .content {
      flex: 1;
      overflow-y: auto;
      padding: 24px
    }

    /* SIDEBAR LOGO */
    .sidebar-logo {
      padding: 20px 16px;
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      gap: 12px;
      overflow: hidden;
    }

    .logo-icon {
      width: 36px;
      height: 36px;
      min-width: 36px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--accent), #a78bfa);
      display: flex;
      align-items: center;
      justify-content: center;
      /* Image specific */
      object-fit: contain;
      padding: 4px;
      box-shadow: 0 4px 12px rgba(124, 110, 245, .4);
    }

    .logo-text {
      overflow: hidden
    }

    .logo-title {
      font-family: var(--font-head);
      font-size: 13px;
      font-weight: 700;
      color: var(--text);
      white-space: nowrap
    }

    .logo-sub {
      font-size: 10px;
      color: var(--text3);
      white-space: nowrap;
      letter-spacing: .5px;
      text-transform: uppercase;
      margin-top: 2px
    }

    /* SIDEBAR NAV */
    .sidebar-nav {
      flex: 1;
      padding: 12px 8px;
      overflow-y: auto
    }

    .nav-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 10px 12px;
      border-radius: var(--radius3);
      cursor: pointer;
      margin-bottom: 4px;
      color: var(--text2);
      font-size: 13px;
      font-weight: 500;
      transition: all .18s;
      white-space: nowrap;
      overflow: hidden;
      border: none;
      background: none;
      width: 100%;
      text-align: left;
    }

    .nav-item:hover {
      background: var(--surface2);
      color: var(--text);
      transform: translateX(4px);
    }
    
    .nav-item:active {
      transform: scale(0.96) translateX(4px);
    }

    .nav-item.active {
      background: linear-gradient(135deg, rgba(124, 110, 245, .2), rgba(124, 110, 245, .1));
      color: var(--accent);
      font-weight: 600
    }

    .nav-item.active .nav-icon {
      color: var(--accent)
    }

    .nav-icon {
      font-size: 17px;
      min-width: 20px;
      text-align: center
    }

    .sidebar-footer {
      padding: 12px 16px;
      border-top: 1px solid var(--border)
    }

    .dev-credit {
      font-size: 10px;
      color: var(--text3);
      line-height: 1.6
    }

    /* ── MOBILE: Icon-only sidebar with tooltips ── */
    @media (max-width: 768px) {

      :root {
        --sidebar-w: 56px;
      }

      .sidebar {
        width: 56px;
        min-width: 56px;
      }

      /* Hide logo text & footer credit on mobile */
      .logo-text,
      .sidebar-footer .dev-credit {
        display: none;
      }

      /* Centre the logo icon */
      .sidebar-logo {
        justify-content: center;
        padding: 16px 10px;
      }

      /* Centre nav items and remove extra padding */
      .nav-item {
        justify-content: center;
        padding: 10px 0;
        gap: 0;
        position: relative;
      }

      /* Hide label text */
      .nav-item > span:not(.nav-icon) {
        display: none;
      }

      /* Tooltip bubble */
      .nav-item::after {
        content: attr(data-label);
        position: absolute;
        left: calc(100% + 10px);
        top: 50%;
        transform: translateY(-50%) scale(0.85);
        background: var(--surface3, #1c2333);
        color: var(--text);
        border: 1px solid var(--border2);
        border-radius: 8px;
        padding: 5px 12px;
        font-size: 12px;
        font-weight: 500;
        white-space: nowrap;
        pointer-events: none;
        opacity: 0;
        transition: opacity 0.2s ease, transform 0.2s ease;
        box-shadow: 0 4px 16px rgba(0,0,0,0.3);
        z-index: 999;
      }

      /* Show tooltip on hover/focus/touch */
      .nav-item:hover::after,
      .nav-item:focus::after,
      .nav-item.tooltip-visible::after {
        opacity: 1;
        transform: translateY(-50%) scale(1);
      }

      /* Also hide hover translate so icons stay centred */
      .nav-item:hover {
        transform: none;
      }
    }

    /* TOPBAR */
    .topbar-title {
      font-family: var(--font-head);
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      flex: 1
    }

    .topbar-title span {
      color: var(--accent)
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 8px 16px;
      border-radius: var(--radius3);
      border: 1px solid var(--border2);
      font-family: var(--font);
      font-size: 12px;
      font-weight: 600;
      cursor: pointer;
      transition: all .18s;
      letter-spacing: .2px;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--accent), #a78bfa);
      color: #fff;
      border-color: transparent;
      box-shadow: 0 4px 12px rgba(124, 110, 245, .3)
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(124, 110, 245, .4);
    }
    
    .btn-primary:active {
      transform: translateY(0) scale(0.96);
    }

    .btn-ghost {
      background: transparent;
      color: var(--text2)
    }

    .btn-ghost:hover {
      background: var(--surface2);
      color: var(--text);
      transform: translateY(-1px);
    }
    
    .btn-ghost:active {
      transform: scale(0.96);
    }

    .btn-success {
      background: linear-gradient(135deg, var(--green), #34d399);
      color: #fff;
      border-color: transparent
    }

    .btn-success:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(16, 185, 129, .35);
    }
    
    .btn-success:active {
      transform: translateY(0) scale(0.96);
    }

    .btn-danger {
      background: linear-gradient(135deg, var(--red), #f87171);
      color: #fff;
      border-color: transparent
    }

    .btn-sm {
      padding: 6px 12px;
      font-size: 11px
    }

    .icon-btn {
      width: 36px;
      height: 36px;
      border-radius: var(--radius3);
      border: 1px solid var(--border2);
      background: var(--surface2);
      color: var(--text2);
      font-size: 16px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all .18s;
    }

    .icon-btn:hover {
      background: var(--surface3);
      color: var(--text);
      border-color: var(--accent);
      transform: translateY(-2px) rotate(4deg);
    }
    
    .icon-btn:active {
      transform: scale(0.9) rotate(0);
    }

    /* UPLOAD PANEL */
    .upload-panel {
      background: var(--surface);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 20px 24px;
      margin-bottom: 24px;
      box-shadow: var(--shadow);
    }

    .section-label {
      font-family: var(--font-head);
      font-size: 13px;
      font-weight: 600;
      color: var(--text2);
      text-transform: uppercase;
      letter-spacing: .8px;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px
    }

    .section-label::after {
      content: '';
      flex: 1;
      height: 1px;
      background: var(--border)
    }

    .upload-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
      gap: 12px;
      margin-bottom: 16px
    }

    .upload-slot {
      border: 2px dashed var(--border2);
      border-radius: var(--radius2);
      padding: 20px 14px;
      text-align: center;
      cursor: pointer;
      transition: all .2s;
      position: relative;
      background: var(--surface2);
      overflow: hidden;
    }

    .upload-slot:hover {
      border-color: var(--accent);
      background: rgba(124, 110, 245, .06);
      transform: translateY(-3px) scale(1.01);
      box-shadow: 0 8px 24px rgba(124, 110, 245, 0.12);
    }
    
    .upload-slot:active {
      transform: scale(0.98);
    }

    .upload-slot.done {
      border-style: solid;
      border-color: var(--green);
      background: rgba(16, 185, 129, .05)
    }

    .upload-slot input[type=file] {
      position: absolute;
      inset: 0;
      opacity: 0;
      cursor: pointer;
      width: 100%;
      height: 100%;
      z-index: 2
    }

    .slot-icon {
      font-size: 24px;
      margin-bottom: 8px
    }

    .slot-label {
      font-size: 12px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 3px
    }

    .slot-hint {
      font-size: 10.5px;
      color: var(--text3)
    }

    .slot-status {
      font-size: 11px;
      font-weight: 600;
      color: var(--green);
      margin-top: 5px
    }

    .slot-browse {
      display: inline-block;
      margin-top: 8px;
      background: var(--surface3);
      color: var(--accent);
      font-size: 10px;
      font-weight: 600;
      padding: 3px 10px;
      border-radius: 5px;
      pointer-events: none;
    }

    .upload-slot.done .slot-browse {
      display: none
    }

    .slot-remove {
      position: absolute;
      top: 8px;
      right: 8px;
      z-index: 3;
      width: 20px;
      height: 20px;
      background: rgba(239, 68, 68, .15);
      color: var(--red);
      border: 1px solid var(--red);
      border-radius: 50%;
      font-size: 12px;
      cursor: pointer;
      display: none;
      align-items: center;
      justify-content: center;
      line-height: 1;
    }

    .upload-slot.done .slot-remove {
      display: flex
    }

    .upload-actions {
      display: flex;
      gap: 10px;
      align-items: center;
      flex-wrap: wrap
    }

    .upload-hint {
      font-size: 11px;
      color: var(--text3);
      margin-left: auto
    }

    /* PAGES */
    .page {
      display: none
    }

    .page.active {
      display: block;
      animation: fadeIn .3s ease
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(12px) scale(0.98);
      }

      to {
        opacity: 1;
        transform: translateY(0) scale(1);
      }
    }

    /* KPI CARDS */
    .kpi-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 14px;
      margin-bottom: 24px
    }

    .kpi-card {
      background: var(--surface);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 20px;
      box-shadow: var(--shadow);
      position: relative;
      overflow: hidden;
      transition: all .22s;
      cursor: default;
    }

    .kpi-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px
    }

    .kpi-card.violet::before {
      background: linear-gradient(90deg, var(--accent), #a78bfa)
    }

    .kpi-card.gold::before {
      background: linear-gradient(90deg, var(--gold), #fbbf24)
    }

    .kpi-card.green::before {
      background: linear-gradient(90deg, var(--green), #34d399)
    }

    .kpi-card.red::before {
      background: linear-gradient(90deg, var(--red), #f87171)
    }

    .kpi-card.blue::before {
      background: linear-gradient(90deg, var(--blue), #60a5fa)
    }

    .kpi-card:hover {
      border-color: var(--accent);
      transform: translateY(-4px) scale(1.02);
      box-shadow: var(--shadow2);
      z-index: 10;
    }

    .kpi-icon {
      font-size: 22px;
      margin-bottom: 10px;
      opacity: .85
    }

    .kpi-val {
      font-family: var(--font-head);
      font-size: 28px;
      font-weight: 700;
      color: var(--text);
      line-height: 1;
      margin-bottom: 4px
    }

    .kpi-label {
      font-size: 10.5px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: .7px;
      color: var(--text3)
    }

    .kpi-sub {
      font-size: 11px;
      color: var(--text3);
      margin-top: 4px
    }

    /* SECTION HEADER */
    .sec-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin: 28px 0 14px;
    }

    .sec-title {
      font-family: var(--font-head);
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      display: flex;
      align-items: center;
      gap: 8px
    }

    .sec-title::after {
      content: '';
      display: block;
      width: 40px;
      height: 2px;
      background: var(--accent);
      border-radius: 2px;
      margin-left: 4px
    }

    .sec-sub {
      font-size: 11px;
      color: var(--text3);
      font-weight: 400
    }

    /* GLASS CARD */
    .card {
      background: var(--surface);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      overflow: hidden;
      margin-bottom: 16px;
    }
    
    .card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow2);
      border-color: var(--border2);
    }

    .card-head {
      padding: 14px 20px;
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: var(--surface2);
    }

    .card-title {
      font-family: var(--font-head);
      font-size: 13px;
      font-weight: 600;
      color: var(--text);
      display: flex;
      align-items: center;
      gap: 8px
    }

    /* CHARTS */
    .chart-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 16px
    }

    .chart-card {
      background: var(--surface);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 20px;
      box-shadow: var(--shadow)
    }

    .chart-label {
      font-family: var(--font-head);
      font-size: 13px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px
    }

    .chart-wrap {
      position: relative;
      height: 220px
    }

    .chart-wrap-tall {
      position: relative;
      height: 300px
    }

    /* AI INSIGHTS */
    .insights-panel {
      background: linear-gradient(135deg, rgba(124, 110, 245, .08), rgba(124, 110, 245, .03));
      border: 1px solid rgba(124, 110, 245, .2);
      border-radius: var(--radius);
      padding: 20px;
      margin-bottom: 16px;
    }

    .insight-item {
      display: flex;
      gap: 12px;
      padding: 10px;
      border-radius: var(--radius3);
      transition: background .18s;
      margin-bottom: 6px;
      align-items: flex-start;
    }

    .insight-item:hover {
      background: rgba(124, 110, 245, .05)
    }

    .insight-icon {
      font-size: 18px;
      flex-shrink: 0;
      margin-top: 1px
    }

    .insight-text {
      font-size: 13px;
      color: var(--text2);
      line-height: 1.5
    }

    .insight-text strong {
      color: var(--text)
    }

    /* TABLES */
    .tbl-wrap {
      overflow-x: auto
    }

    table {
      width: 100%;
      border-collapse: collapse
    }

    thead tr {
      background: var(--surface2)
    }

    th {
      padding: 11px 14px;
      font-size: 10.5px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: .8px;
      color: var(--text3);
      text-align: left;
      white-space: nowrap;
      border-bottom: 1px solid var(--border);
    }

    td {
      padding: 10px 14px;
      font-size: 13px;
      border-bottom: 1px solid var(--border);
      color: var(--text2);
      white-space: nowrap;
      vertical-align: middle
    }

    tr:last-child td {
      border-bottom: none
    }

    tbody tr {
      transition: background .15s
    }

    tbody tr:hover td {
      background: var(--surface2);
      color: var(--text)
    }

    /* GRADE CHIPS */
    .grade {
      display: inline-flex;
      align-items: center;
      padding: 2px 8px;
      border-radius: 5px;
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 600;
      border: 1px solid transparent
    }

    .grade-S {
      background: rgba(16, 185, 129, .15);
      color: #34d399;
      border-color: rgba(16, 185, 129, .3);
      box-shadow: 0 0 10px rgba(16, 185, 129, 0.2);
    }

    .grade-Ap,
    .grade-A {
      background: rgba(59, 130, 246, .15);
      color: #60a5fa;
      border-color: rgba(59, 130, 246, .3);
      box-shadow: 0 0 10px rgba(59, 130, 246, 0.2);
    }

    .grade-Bp,
    .grade-B {
      background: rgba(99, 102, 241, .15);
      color: #818cf8;
      border-color: rgba(99, 102, 241, .3);
      box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
    }

    .grade-Cp,
    .grade-C {
      background: rgba(245, 158, 11, .15);
      color: #fbbf24;
      border-color: rgba(245, 158, 11, .3);
      box-shadow: 0 0 10px rgba(245, 158, 11, 0.2);
    }

    .grade-D {
      background: rgba(249, 115, 22, .15);
      color: #fb923c;
      border-color: rgba(249, 115, 22, .3);
      box-shadow: 0 0 10px rgba(249, 115, 22, 0.2);
    }

    .grade-P,
    .grade-PASS {
      background: rgba(16, 185, 129, .1);
      color: #6ee7b7;
      border-color: rgba(16, 185, 129, .2);
      box-shadow: 0 0 8px rgba(16, 185, 129, 0.15);
    }

    .grade-F {
      background: rgba(239, 68, 68, .15);
      color: #f87171;
      border-color: rgba(239, 68, 68, .3);
      font-weight: 700;
      box-shadow: 0 0 12px rgba(239, 68, 68, 0.25);
    }

    .grade-FE {
      background: rgba(236, 72, 153, .15);
      color: #f472b6;
      border-color: rgba(236, 72, 153, .3);
      font-weight: 700;
      box-shadow: 0 0 12px rgba(236, 72, 153, 0.25);
    }

    .grade-AB {
      background: rgba(139, 92, 246, .15);
      color: #c084fc;
      border-color: rgba(139, 92, 246, .3);
      font-weight: 700;
      box-shadow: 0 0 12px rgba(139, 92, 246, 0.25);
    }

    .grade-WH {
      background: rgba(245, 158, 11, .15);
      color: #fbbf24;
      border-color: rgba(245, 158, 11, .3);
      font-weight: 700;
      box-shadow: 0 0 12px rgba(245, 158, 11, 0.25);
    }

    /* BADGES */
    .badge {
      display: inline-flex;
      align-items: center;
      padding: 3px 10px;
      border-radius: 20px;
      font-size: 10.5px;
      font-weight: 700;
      letter-spacing: .3px
    }

    .badge-pass {
      background: rgba(16, 185, 129, .15);
      color: var(--green);
      box-shadow: 0 0 10px rgba(16, 185, 129, 0.2);
    }

    .badge-fail {
      background: rgba(239, 68, 68, .15);
      color: var(--red);
      box-shadow: 0 0 10px rgba(239, 68, 68, 0.2);
    }

    .badge-sem {
      background: rgba(124, 110, 245, .15);
      color: var(--accent);
      font-family: var(--font-mono);
      font-size: 10px;
      box-shadow: 0 0 10px rgba(124, 110, 245, 0.15);
    }

    .badge-clear {
      background: rgba(16, 185, 129, .12);
      color: var(--green);
      box-shadow: 0 0 8px rgba(16, 185, 129, 0.15);
    }

    .badge-arrear {
      background: rgba(239, 68, 68, .12);
      color: var(--red);
      box-shadow: 0 0 8px rgba(239, 68, 68, 0.15);
    }

    /* PCT BAR */
    .pct-bar {
      display: flex;
      align-items: center;
      gap: 8px;
      min-width: 120px
    }

    .pct-track {
      flex: 1;
      height: 6px;
      background: var(--surface3);
      border-radius: 3px;
      overflow: hidden;
      min-width: 50px
    }

    .pct-fill {
      height: 100%;
      border-radius: 3px;
      transition: width .5s
    }

    .pct-fill.green {
      background: linear-gradient(90deg, var(--green), #34d399);
      box-shadow: 0 0 10px rgba(16, 185, 129, 0.3);
    }

    .pct-fill.gold {
      background: linear-gradient(90deg, var(--gold), #fbbf24);
      box-shadow: 0 0 10px rgba(245, 158, 11, 0.3);
    }

    .pct-fill.red {
      background: linear-gradient(90deg, var(--red), #f87171);
      box-shadow: 0 0 10px rgba(239, 68, 68, 0.3);
    }

    .pct-fill.purple {
      background: linear-gradient(90deg, var(--accent), #a78bfa);
      box-shadow: 0 0 10px rgba(124, 110, 245, 0.3);
    }

    .pct-num {
      font-family: var(--font-mono);
      font-size: 11.5px;
      font-weight: 600;
      min-width: 40px;
      text-align: right
    }

    .pct-num.green-c {
      color: var(--green)
    }

    .pct-num.gold-c {
      color: var(--gold)
    }

    .pct-num.red-c {
      color: var(--red)
    }

    /* SEARCH & FILTER */
    .filter-row {
      display: flex;
      gap: 10px;
      align-items: center;
      margin-bottom: 16px;
      flex-wrap: wrap
    }

    .search-input {
      background: var(--surface2);
      border: 1px solid var(--border2);
      border-radius: var(--radius3);
      padding: 9px 14px 9px 36px;
      font-family: var(--font);
      font-size: 13px;
      color: var(--text);
      min-width: 260px;
      transition: all .18s;
      position: relative;
    }

    .search-wrap {
      position: relative;
      display: inline-block
    }

    .search-wrap::before {
      content: '🔍';
      position: absolute;
      left: 11px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 13px;
      pointer-events: none;
      z-index: 1
    }

    .search-input:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(124, 110, 245, .15)
    }

    .filter-tab {
      padding: 7px 14px;
      border-radius: var(--radius3);
      border: 1px solid var(--border2);
      background: var(--surface2);
      font-size: 12px;
      font-weight: 600;
      cursor: pointer;
      color: var(--text2);
      transition: all .18s;
    }

    .filter-tab:hover {
      border-color: var(--accent);
      color: var(--text);
      transform: translateY(-2px);
    }
    
    .filter-tab:active {
      transform: scale(0.95);
    }

    .filter-tab.active {
      background: rgba(124, 110, 245, .2);
      border-color: var(--accent);
      color: var(--accent)
    }

    /* STUDENT CARDS */
    .student-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
      gap: 14px;
      margin-bottom: 20px
    }

    .student-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 18px;
      cursor: pointer;
      transition: all .22s;
      position: relative;
      overflow: hidden;
    }

    .student-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: linear-gradient(90deg, var(--accent), #a78bfa)
    }

    .student-card:hover {
      border-color: var(--accent);
      transform: translateY(-5px) scale(1.02);
      box-shadow: var(--shadow2), var(--glow);
      z-index: 5;
    }
    
    .student-card:active {
      transform: scale(0.98);
    }

    .stu-roll {
      font-family: var(--font-mono);
      font-size: 10px;
      color: var(--text3);
      margin-bottom: 4px
    }

    .stu-name {
      font-weight: 600;
      font-size: 14px;
      color: var(--text);
      margin-bottom: 4px;
      line-height: 1.3
    }

    .stu-nums {
      display: flex;
      gap: 14px;
      margin: 12px 0 10px
    }

    .sn-val {
      font-family: var(--font-head);
      font-size: 22px;
      font-weight: 700;
      color: var(--text);
      line-height: 1
    }

    .sn-lbl {
      font-size: 9px;
      text-transform: uppercase;
      letter-spacing: .6px;
      color: var(--text3);
      margin-top: 2px
    }

    .stu-bar {
      height: 3px;
      background: var(--surface3);
      border-radius: 2px;
      margin-top: 8px
    }

    .stu-bar-fill {
      height: 100%;
      border-radius: 2px;
      transition: width .5s;
      box-shadow: 0 0 6px rgba(124, 110, 245, 0.3); /* Default glow */
    }

    /* MODAL */
    .overlay {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, .72);
      z-index: 1000;
      backdrop-filter: blur(8px);
      overflow-y: auto;
      padding: 36px 20px;
      align-items: flex-start;
      justify-content: center
    }

    .overlay.open {
      display: flex;
      animation: fadeIn .25s ease
    }

    .modal {
      background: var(--surface);
      border: 1px solid var(--border2);
      border-radius: var(--radius);
      width: 100%;
      max-width: 980px;
      box-shadow: 0 24px 80px rgba(0, 0, 0, .6);
      overflow: hidden;
    }

    .modal-head {
      background: linear-gradient(135deg, var(--accent), #a78bfa);
      padding: 24px 28px;
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .modal-avatar {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: rgba(255, 255, 255, .2);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: var(--font-head);
      font-size: 20px;
      font-weight: 700;
      flex-shrink: 0;
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, .3);
    }

    .modal-name {
      font-family: var(--font-head);
      color: #fff;
      font-size: 18px;
      font-weight: 700
    }

    .modal-roll {
      color: rgba(255, 255, 255, .7);
      font-size: 11px;
      margin-top: 3px;
      font-family: var(--font-mono)
    }

    .modal-close {
      margin-left: auto;
      background: rgba(255, 255, 255, .15);
      border: none;
      color: #fff;
      width: 34px;
      height: 34px;
      border-radius: 8px;
      font-size: 17px;
      cursor: pointer;
      transition: background .18s;
      backdrop-filter: blur(5px);
    }

    .modal-close:hover {
      background: rgba(255, 255, 255, .25)
    }

    .modal-body {
      padding: 24px 28px
    }

    /* SEM TABS (in modal) */
    .sem-tabs {
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
      margin-bottom: 16px
    }

    .sem-tab {
      padding: 6px 14px;
      border-radius: var(--radius3);
      border: 1px solid var(--border2);
      background: var(--surface2);
      font-size: 11.5px;
      font-weight: 600;
      cursor: pointer;
      color: var(--text2);
      transition: all .18s;
    }

    .sem-tab:hover {
      border-color: var(--accent);
      color: var(--text);
      transform: translateY(-2px);
    }
    
    .sem-tab:active {
      transform: scale(0.95);
    }

    .sem-tab.active {
      background: rgba(124, 110, 245, .2);
      color: var(--accent);
      border-color: var(--accent)
    }

    .sem-pane {
      display: none
    }

    .sem-pane.active {
      display: block
    }

    /* ACCORDION */
    .acc {
      margin-bottom: 14px
    }

    .acc-head {
      background: var(--surface2);
      border: 1px solid var(--border);
      border-radius: var(--radius2);
      padding: 14px 18px;
      display: flex;
      align-items: center;
      gap: 12px;
      cursor: pointer;
      user-select: none;
      transition: all .18s;
    }

    .acc-head:hover {
      border-color: var(--accent);
      background: rgba(124, 110, 245, 0.03);
    }
    
    .acc-head:active {
      transform: scale(0.99);
    }

    .acc-head.open {
      border-radius: var(--radius2) var(--radius2) 0 0;
      border-color: var(--accent)
    }

    .acc-title {
      font-family: var(--font-head);
      font-size: 14px;
      font-weight: 600;
      color: var(--text)
    }

    .acc-sub {
      font-size: 11.5px;
      color: var(--text3);
      margin-top: 2px
    }

    .acc-arrow {
      margin-left: auto;
      font-size: 16px;
      transition: transform .2s;
      color: var(--text3)
    }

    .acc-body {
      background: var(--surface);
      border: 1px solid var(--accent);
      border-top: none;
      border-radius: 0 0 var(--radius2) var(--radius2);
      overflow: hidden
    }

    .acc-inner {
      padding: 20px
    }

    .acc-body.hidden {
      display: none
    }

    /* EMPTY STATE */
    .empty {
      text-align: center;
      padding: 80px 30px
    }

    .empty-ico {
      font-size: 52px;
      opacity: .25;
      margin-bottom: 16px
    }

    .empty-title {
      font-family: var(--font-head);
      font-size: 20px;
      color: var(--text);
      opacity: .4;
      margin-bottom: 8px
    }

    .empty-text {
      font-size: 13px;
      color: var(--text3);
      max-width: 360px;
      margin: 0 auto;
      line-height: 1.7
    }

    /* PODIUM */
    .podium {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      margin-bottom: 24px
    }

    .podium-card {
      flex: 1;
      min-width: 220px;
      background: var(--surface);
      border-radius: var(--radius);
      padding: 22px 20px;
      box-shadow: var(--shadow);
      position: relative;
      overflow: hidden;
      text-align: center;
      border: 2px solid var(--border);
      transition: all .22s;
    }

    .podium-card:hover {
      transform: translateY(-6px) scale(1.03);
      box-shadow: var(--shadow2);
    }
    
    .podium-card:active {
      transform: scale(0.98);
    }

    .podium-card.gold {
      border-color: var(--gold);
      box-shadow: 0 8px 30px rgba(245, 158, 11, .2)
    }

    .podium-card.silver {
      border-color: #94a3b8;
      box-shadow: 0 8px 30px rgba(148, 163, 184, .15)
    }

    .podium-card.bronze {
      border-color: #b45309;
      box-shadow: 0 8px 30px rgba(180, 83, 9, .15)
    }

    .podium-medal {
      font-size: 36px;
      margin-bottom: 8px;
      display: block
    }

    .podium-name {
      font-family: var(--font-head);
      font-size: 14px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 4px;
      line-height: 1.3
    }

    .podium-roll {
      font-family: var(--font-mono);
      font-size: 10px;
      color: var(--text3);
      margin-bottom: 12px
    }

    .podium-cgpa {
      font-family: var(--font-head);
      font-size: 30px;
      font-weight: 700;
      line-height: 1
    }

    /* LEADERBOARD */
    .lb-rank {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 12px 16px;
      border-radius: var(--radius3);
      transition: background .15s;
      cursor: pointer;
      border-bottom: 1px solid var(--border);
    }

    .lb-rank:last-child {
      border-bottom: none
    }

    .lb-rank:hover {
      background: var(--surface2)
    }

    .lb-pos {
      font-family: var(--font-head);
      font-size: 14px;
      font-weight: 700;
      color: var(--text3);
      min-width: 32px;
      text-align: center
    }

    .lb-pos.gold {
      color: var(--gold)
    }

    .lb-pos.silver {
      color: #94a3b8
    }

    .lb-pos.bronze {
      color: #b45309
    }

    /* PDF OVERLAY */
    #pdfOverlay {
      display: none;
      position: fixed;
      inset: 0;
      z-index: 9999;
      background: rgba(0, 0, 0, .9);
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 18px
    }

    #pdfOverlay.show {
      display: flex
    }

    .pdf-spinner {
      width: 52px;
      height: 52px;
      border: 4px solid rgba(255, 255, 255, .1);
      border-top-color: var(--accent);
      border-radius: 50%;
      animation: spin .8s linear infinite
    }

    @keyframes spin {
      to {
        transform: rotate(360deg)
      }
    }

    .pdf-msg {
      font-size: 14px;
      color: rgba(255, 255, 255, .8)
    }

    .pdf-bar {
      width: 280px;
      height: 5px;
      background: rgba(255, 255, 255, .1);
      border-radius: 3px;
      overflow: hidden
    }

    .pdf-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--accent), #a78bfa);
      transition: width .3s
    }

    /* HI COLORS */
    .hi-g {
      color: var(--green);
      font-weight: 600
    }

    .hi-r {
      color: var(--red);
      font-weight: 600
    }

    .hi-m {
      color: var(--text3)
    }

    .hi-b {
      color: var(--blue);
      font-weight: 600
    }

    .hi-v {
      color: var(--accent);
      font-weight: 600
    }

    .mono {
      font-family: var(--font-mono)
    }

    /* THEME SWITCHER */
    .theme-switcher {
      display: flex;
      align-items: center;
      background: var(--surface2);
      border: 1px solid var(--border2);
      border-radius: 24px;
      padding: 4px;
      position: relative;
      cursor: pointer;
      gap: 4px;
      box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.15);
    }

    .ts-slider {
      position: absolute;
      width: 28px;
      height: 28px;
      background: var(--surface3);
      border: 1px solid var(--accent);
      border-radius: 50%;
      box-shadow: 0 4px 12px rgba(0,0,0,0.3), var(--glow);
      transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.3s, border-color 0.3s;
      z-index: 1;
    }

    [data-theme="dark"] .ts-slider { transform: translateX(0); background: rgba(167, 139, 250, 0.15); border-color: #a78bfa; }
    [data-theme="medium"] .ts-slider { transform: translateX(32px); background: rgba(34, 211, 238, 0.15); border-color: #22d3ee; }
    [data-theme="light"] .ts-slider { transform: translateX(64px); background: #fff; border-color: #6366f1; }

    .ts-icon {
      width: 28px;
      height: 28px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      z-index: 2;
      opacity: 0.5;
      transition: all 0.3s;
    }

    [data-theme="dark"] .ts-icon:nth-child(2),
    [data-theme="medium"] .ts-icon:nth-child(3),
    [data-theme="light"] .ts-icon:nth-child(4) {
      opacity: 1;
      transform: scale(1.15);
      filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
    }

    /* FULLY RESPONSIVE OMNICHANNEL DESIGN */
    @media(max-width: 820px) {
      /* App Shell Vertical Stacking */
      .app-shell { flex-direction: column; height: 100vh; overflow: hidden; }
      
      /* Sidebar transforms to Top Nav */
      .sidebar {
        width: 100%; min-width: 100%; height: auto; min-height: auto;
        border-right: none; border-bottom: 1px solid var(--border);
        flex-direction: column; overflow: visible; padding: 0;
      }
      .sidebar-logo { padding: 12px 16px; border-bottom: none; display: flex; justify-content: space-between; }
      
      .sidebar-nav {
        display: flex; flex-direction: row; overflow-x: auto; white-space: nowrap;
        padding: 0 16px 8px; margin: 0; gap: 8px;
        /* Hide scrollbar */
        scrollbar-width: none; -ms-overflow-style: none;
      }
      .sidebar-nav::-webkit-scrollbar { display: none; }
      
      .nav-item { width: auto; flex: 0 0 auto; margin-bottom: 0; padding: 8px 14px; display: inline-flex; }
      .sidebar-footer { display: none; }

      /* Topbar */
      .topbar { padding: 12px 16px; height: auto; min-height: unset; flex-wrap: wrap; gap: 12px; }
      .topbar-title { font-size: 14px; line-height: 1.4; width: 100%; text-align: left; margin: 0; }
      .topbar-actions { width: 100%; justify-content: space-between; }
      
      /* Content padding & Grid adjustments */
      .content { padding: 16px; overflow-y: auto; flex: 1; }
      
      /* Analysis Grids */
      .chart-grid { grid-template-columns: 1fr; gap: 16px; }
      .kpi-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
      .upload-grid { grid-template-columns: 1fr; }
      .stats-row { grid-template-columns: repeat(2, 1fr); }
      
      .podium { flex-direction: column; gap: 16px; }
      .modal-body { padding: 16px; }
      
      .hero-title { font-size: 2.2rem !important; }
      .hero-desc { font-size: 0.95rem; }
      
      /* Mode Cards (index) */
      .mode-grid { grid-template-columns: 1fr !important; }
      .mode-card { padding: 24px; }
      .mode-icon { width: 48px; height: 48px; font-size: 20px; }
      .mode-name { font-size: 20px; }
      
      /* Cards & Charts */
      .card-head { flex-direction: column; align-items: flex-start; gap: 10px; }
      .chart-wrap { height: 250px; }
      .chart-wrap-tall { height: 250px; }
    }

    @media(max-width: 480px) {
      .kpi-grid { grid-template-columns: 1fr !important; }
      .stats-row { grid-template-columns: 1fr; }
      .search-input { min-width: 100%; margin-bottom: 10px; }
      .hero-title { font-size: 1.8rem !important; }
      .card { padding: 12px !important; }
      .upload-panel { padding: 16px 12px; }
      .mode-card { padding: 16px; }
    }

    /* STATS ROW (for modal and pages) */
    .stats-row {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
      gap: 12px;
      margin-bottom: 20px
    }

    /* INLINE BAR */
    .ibar {
      display: flex;
      align-items: center;
      gap: 8px
    }

    .ibar-track {
      flex: 1;
      height: 18px;
      background: var(--surface3);
      border-radius: 4px;
      overflow: hidden;
      min-width: 60px
    }

    .ibar-fill {
      height: 100%;
      border-radius: 4px;
      display: flex;
      align-items: center;
      padding-left: 6px;
      font-size: 10px;
      font-weight: 700;
      color: #fff;
      box-shadow: 0 0 8px rgba(0, 0, 0, 0.2);
    }

    /* RISK TABLE */
    td.risk-low {
      color: var(--green)
    }

    td.risk-med {
      color: var(--gold)
    }

    td.risk-high {
      color: var(--red);
      font-weight: 700
    }

    /* COUNT-UP */
    .count-up {
      display: inline-block
    }
  

/* Ensure footer is at bottom */
.sidebar-footer { margin-top: auto !important; }


/* LANDING PAGE SPECIFIC */
.hero-page {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: calc(100vh - 120px); text-align: center; padding: 40px 20px;
}
.hero-title {
  font-family: var(--font-head); font-size: 3.5rem; font-weight: 800; margin-bottom: 1rem;
  background: linear-gradient(to right, var(--text), var(--accent));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  animation: glowText 3s infinite alternate;
}
@keyframes glowText {
  from { filter: drop-shadow(0 0 6px rgba(167, 139, 250, 0.2)); }
  to   { filter: drop-shadow(0 0 18px rgba(167, 139, 250, 0.55)); }
}
.hero-desc { color: var(--text2); font-size: 1.1rem; max-width: 600px; margin-bottom: 3rem; }

.mode-grid { display: grid; grid-template-columns: repeat(2, minmax(300px, 400px)); gap: 30px; }
.mode-card {
  background: var(--surface2); border: 1px solid var(--border); border-radius: 24px;
  padding: 40px; text-align: left; cursor: pointer; transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative; overflow: hidden;
}
.mode-card::before {
  content: ''; position: absolute; inset: 0; 
  background: linear-gradient(135deg, rgba(167, 139, 250, 0.1), transparent);
  opacity: 0; transition: opacity 0.4s;
}
.mode-card:hover { transform: translateY(-12px) scale(1.02); border-color: var(--accent); box-shadow: var(--shadow2), var(--glow); }
.mode-card:hover::before { opacity: 1; }

.mode-icon {
  width: 64px; height: 64px; border-radius: 18px; margin-bottom: 24px;
  display: flex; align-items: center; justify-content: center; font-size: 28px;
  background: var(--surface3); border: 1px solid var(--border2); color: var(--accent);
  transition: all 0.4s;
}
.mode-card:hover .mode-icon { transform: scale(1.1) rotate(5deg); background: var(--accent); color: #fff; }

.mode-name { font-family: var(--font-head); font-size: 24px; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.mode-hint { color: var(--text2); font-size: 14px; line-height: 1.6; }

/* SIDEBAR LOGO & NAV */
.sidebar-logo { padding: 20px 16px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 12px; }
.logo-icon {
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  display: flex;
  align-items: center;
  justify-content: center;
  /* Image specific */
  object-fit: contain;
  padding: 4px;
  box-shadow: 0 4px 12px rgba(124, 110, 245, .4);
}
.logo-title {
  font-family: var(--font-head); font-size: 17px; font-weight: 800; letter-spacing: .04em; color: var(--accent); line-height: 1;
}
.logo-sub {
  font-size: 9px; letter-spacing: .12em; color: var(--text2); line-height: 1; text-transform: uppercase;
}

/* PAGE TRANSITIONS */
.fade-in { animation: fadeIn 0.4s ease-out forwards; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* RESPONSIVE LANDING (Managed Above) */


    /* APP FOOTER */
    .app-footer {
      margin-top: auto;
      padding: 40px 24px;
      border-top: 1px solid var(--border);
      text-align: center;
      background: rgba(0, 0, 0, 0.02);
    }

    [data-theme="light"] .app-footer {
      background: rgba(0, 0, 0, 0.01);
    }

    .footer-content {
      max-width: 800px;
      margin: 0 auto;
    }

    .disclaimer-box {
      font-size: 13px;
      line-height: 1.6;
      color: var(--text3);
    }

    .disclaimer-title {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      font-weight: 600;
      color: var(--text2);
      margin-bottom: 8px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .footer-contact {
      margin-top: 16px;
      font-size: 13px;
      color: var(--text3);
    }

    .footer-link {
      color: var(--accent);
      text-decoration: none;
      font-weight: 500;
      transition: all 0.2s;
      border-bottom: 1px solid transparent;
    }

    .footer-link:hover {
      border-bottom-color: var(--accent);
      opacity: 0.8;
    }
    /* PERFORMANCE CARDS (Subject Analysis) */
    .perf-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
      gap: 24px;
      margin-bottom: 30px;
    }

    .perf-card {
      background: rgba(10, 15, 30, 0.7);
      backdrop-filter: blur(20px);
      border: 1px solid rgba(167, 139, 250, 0.15);
      border-radius: 16px;
      padding: 24px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.4);
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .perf-card.high {
      border-color: rgba(16, 217, 168, 0.3);
      box-shadow: 0 10px 30px rgba(16, 217, 168, 0.05);
    }

    .perf-card.improve {
      border-color: rgba(244, 63, 94, 0.3);
      box-shadow: 0 10px 30px rgba(244, 63, 94, 0.05);
    }

    .perf-header {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .perf-title {
      font-family: var(--font-head);
      font-size: 15px;
      font-weight: 700;
      color: var(--text);
      letter-spacing: 0.5px;
      text-transform: uppercase;
    }

    .perf-cols {
      display: flex;
      justify-content: space-between;
      font-size: 11px;
      color: var(--text2);
      padding-bottom: 8px;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }

    .perf-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .perf-row {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .perf-rank {
      width: 22px;
      height: 22px;
      min-width: 22px;
      border-radius: 50%;
      border: 1.5px solid;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 11px;
      font-weight: 700;
    }

    .high .perf-rank { border-color: var(--green); color: var(--green); }
    .improve .perf-rank { border-color: var(--red); color: var(--red); }

    .perf-name {
      font-size: 13px;
      font-weight: 500;
      color: var(--text);
      flex: 1;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .perf-bar-wrap {
      width: 120px;
      height: 8px;
      background: rgba(255,255,255,0.05);
      border-radius: 4px;
      overflow: hidden;
      position: relative;
    }

    .perf-bar {
      height: 100%;
      border-radius: 4px;
      transition: width 1s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    .high .perf-bar { background: linear-gradient(90deg, #059669, var(--green)); }
    .improve .perf-bar { background: linear-gradient(90deg, #dc2626, var(--red)); }

    .perf-pct {
      min-width: 45px;
      text-align: right;
      font-size: 13px;
      font-weight: 700;
      font-family: var(--font-mono);
    }

    .perf-footer {
      margin-top: 8px;
      padding: 16px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      gap: 16px;
      background: rgba(255,255,255,0.02);
      border: 1px solid rgba(255,255,255,0.05);
    }

    .high .perf-footer { background: rgba(16, 217, 168, 0.03); border-color: rgba(16, 217, 168, 0.1); }
    .improve .perf-footer { background: rgba(244, 63, 94, 0.03); border-color: rgba(244, 63, 94, 0.1); }

    .perf-footer-icon {
      font-size: 24px;
      opacity: 0.9;
    }

    .perf-footer-text {
      font-size: 13px;
      font-weight: 500;
      line-height: 1.4;
      color: var(--text);
    }

    [data-theme="light"] .perf-card {
      background: rgba(255, 255, 255, 0.8);
      border-color: rgba(0,0,0,0.05);
      box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    }
    [data-theme="light"] .perf-footer {
      background: rgba(0,0,0,0.02);
    }

    /* SUBJECT ANALYSIS KPI CARDS */
    .sub-kpi-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 16px;
      margin-bottom: 24px;
    }

    .sub-kpi-card {
      background: rgba(10, 15, 30, 0.6);
      backdrop-filter: blur(20px);
      border: 1.5px solid rgba(255, 255, 255, 0.05);
      border-radius: 14px;
      padding: 18px 20px;
      display: flex;
      align-items: center;
      gap: 16px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .sub-kpi-card:hover {
      transform: translateY(-3px);
      background: rgba(10, 15, 30, 0.8);
    }

    .sub-kpi-card.blue { border-color: rgba(59, 130, 246, 0.3); box-shadow: 0 0 20px rgba(59, 130, 246, 0.05); }
    .sub-kpi-card.green { border-color: rgba(16, 185, 129, 0.3); box-shadow: 0 0 20px rgba(16, 185, 129, 0.05); }
    .sub-kpi-card.gold { border-color: rgba(245, 158, 11, 0.3); box-shadow: 0 0 20px rgba(245, 158, 11, 0.05); }
    .sub-kpi-card.red { border-color: rgba(239, 68, 68, 0.3); box-shadow: 0 0 20px rgba(239, 68, 68, 0.05); }
    .sub-kpi-card.purple { border-color: rgba(139, 92, 246, 0.3); box-shadow: 0 0 20px rgba(139, 92, 246, 0.05); }

    .sub-kpi-icon {
      font-size: 32px;
      flex-shrink: 0;
      opacity: 0.9;
    }

    .sub-kpi-card.blue .sub-kpi-icon { color: #60a5fa; text-shadow: 0 0 10px rgba(96, 165, 250, 0.5); }
    .sub-kpi-card.green .sub-kpi-icon { color: #34d399; text-shadow: 0 0 10px rgba(52, 211, 153, 0.5); }
    .sub-kpi-card.gold .sub-kpi-icon { color: #fbbf24; text-shadow: 0 0 10px rgba(251, 191, 36, 0.5); }
    .sub-kpi-card.red .sub-kpi-icon { color: #f87171; text-shadow: 0 0 10px rgba(248, 113, 113, 0.5); }
    .sub-kpi-card.purple .sub-kpi-icon { color: #a78bfa; text-shadow: 0 0 10px rgba(167, 139, 250, 0.5); }

    .sub-kpi-info {
      display: flex;
      flex-direction: column;
      gap: 2px;
      flex: 1;
      overflow: hidden;
    }

    .sub-kpi-label {
      font-size: 9px;
      font-weight: 800;
      color: var(--text3);
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .sub-kpi-val {
      font-size: 20px;
      font-weight: 800;
      color: var(--text);
      font-family: var(--font-head);
      line-height: 1.2;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .sub-kpi-sub {
      font-size: 10px;
      color: var(--text3);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    [data-theme="light"] .sub-kpi-card {
      background: rgba(255, 255, 255, 0.9);
      border-color: rgba(0,0,0,0.08);
      box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }
    [data-theme="light"] .sub-kpi-val { color: var(--text); }

    /* CURRICULUM PERFORMANCE MATRIX */
    .matrix-card {
      background: rgba(10, 15, 30, 0.7);
      backdrop-filter: blur(20px);
      border: 1px solid rgba(255, 255, 255, 0.05);
      border-radius: 20px;
      padding: 28px;
      box-shadow: 0 15px 40px rgba(0,0,0,0.4);
      overflow-x: auto;
    }

    .matrix-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
    }

    .matrix-title {
      font-family: var(--font-head);
      font-size: 16px;
      font-weight: 700;
      color: var(--text);
      letter-spacing: 0.5px;
      text-transform: uppercase;
    }

    .cur-matrix-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 8px;
    }

    .cur-matrix-table th {
      padding: 12px;
      font-size: 11px;
      font-weight: 800;
      color: var(--text2);
      text-transform: uppercase;
      text-align: center;
      background: rgba(255, 255, 255, 0.03);
      border-radius: 8px;
    }

    .cur-matrix-table td {
      padding: 0;
      vertical-align: top;
    }

    .cur-slot-label {
      padding: 12px;
      font-size: 11px;
      font-weight: 700;
      color: var(--text3);
      text-align: left;
      background: rgba(255, 255, 255, 0.02);
      border-radius: 8px;
      height: 100%;
      display: flex;
      align-items: center;
    }

    .cur-cell {
      padding: 12px;
      border-radius: 10px;
      display: flex;
      flex-direction: column;
      gap: 4px;
      align-items: center;
      justify-content: center;
      transition: all 0.3s ease;
      min-height: 60px;
      position: relative;
      overflow: hidden;
    }

    .cur-cell:hover {
      transform: scale(1.05);
      z-index: 2;
      box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    }

    .cur-code {
      font-size: 10px;
      font-weight: 800;
      color: rgba(255, 255, 255, 0.9);
      letter-spacing: 0.5px;
    }

    .cur-pct {
      font-size: 14px;
      font-weight: 800;
      font-family: var(--font-mono);
    }

    /* Colors */
    .cur-vhigh { background: linear-gradient(135deg, #065f46, #059669); color: #fff; }
    .cur-high { background: linear-gradient(135deg, #047857, #10b981); color: #fff; }
    .cur-med { background: linear-gradient(135deg, #b45309, #f59e0b); color: #fff; }
    .cur-low { background: linear-gradient(135deg, #c2410c, #f97316); color: #fff; }
    .cur-vlow { background: linear-gradient(135deg, #991b1b, #ef4444); color: #fff; }
    .cur-empty { background: rgba(255, 255, 255, 0.02); border: 1px dashed rgba(255, 255, 255, 0.05); min-height: 60px; }

    [data-theme="light"] .cur-matrix-table th { background: #f3f4f6; }
    [data-theme="light"] .cur-slot-label { background: #f9fafb; }
    [data-theme="light"] .cur-empty { background: #fdfdfd; border-color: #e5e7eb; }

    [data-theme="light"] .matrix-row { background: #fff; border-color: rgba(0,0,0,0.05); }
    [data-theme="light"] .matrix-track::before { background: rgba(0,0,0,0.05); }
    [data-theme="light"] .matrix-node.node-none { background: #f3f4f6; color: #9ca3af; }

    .index-content {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .index-main {
      display: flex;
      align-items: center;
      gap: 30px;
    }

    .index-chart-wrap {
      width: 180px;
      height: 180px;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .index-chart-center {
      position: absolute;
      text-align: center;
      pointer-events: none;
      z-index: 1;
    }

    .index-chart-center-val {
      font-size: 24px;
      font-weight: 800;
      color: var(--text);
      line-height: 1;
      display: block;
    }

    .index-chart-center-lbl {
      font-size: 10px;
      font-weight: 600;
      color: var(--text3);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .index-legend {
      display: flex;
      flex-direction: column;
      gap: 12px;
      flex: 1;
    }

    .legend-item {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .legend-color {
      width: 14px;
      height: 14px;
      border-radius: 3px;
    }

    .legend-info {
      display: flex;
      flex-direction: column;
    }

    .legend-label {
      font-size: 12px;
      font-weight: 600;
      color: var(--text);
    }

    .legend-sub {
      font-size: 11px;
      color: var(--text3);
    }

    .index-summary-box {
      background: rgba(59, 130, 246, 0.05);
      border: 1px solid rgba(59, 130, 246, 0.15);
      border-radius: 12px;
      padding: 16px;
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .index-summary-icon {
      font-size: 24px;
      color: #60a5fa;
    }

    .index-summary-text {
      font-size: 13px;
      font-weight: 500;
      line-height: 1.5;
      color: var(--text);
    }

    .index-summary-text strong { color: var(--green); }

    [data-theme="light"] .analysis-card {
      background: rgba(255, 255, 255, 0.9);
      border-color: rgba(0,0,0,0.05);
      box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    }
    [data-theme="light"] .heatmap-table th { background: rgba(0,0,0,0.02); }
    [data-theme="light"] .heatmap-table td:first-child { background: rgba(0,0,0,0.01); }
    [data-theme="light"] .index-summary-box { background: rgba(0,0,0,0.02); border-color: rgba(0,0,0,0.05); }

    .analysis-bottom-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-top: 24px;
    }

    .matrix-full-width {
      grid-column: 1 / -1;
    }

/* HEATMAP TABLE */
.heatmap-table { width: 100%; border-collapse: collapse; font-size: 11px; }
.heatmap-table th, .heatmap-table td { padding: 8px 6px; text-align: center; border: 1px solid var(--border); }
.heatmap-table th { background: var(--surface2); color: var(--text2); font-weight: 600; text-transform: uppercase; font-size: 10px; letter-spacing: 0.5px; }
.heatmap-table td:first-child { text-align: left; font-weight: 600; background: var(--surface); color: var(--text); white-space: nowrap; }
.heat-vhigh { background: rgba(239, 68, 68, 0.3) !important; color: #fecaca; font-weight: 700; }
.heat-high { background: rgba(239, 68, 68, 0.15) !important; color: #f87171; }
.heat-med { background: rgba(245, 158, 11, 0.15) !important; color: #fbbf24; }
.heat-low { background: rgba(16, 185, 129, 0.1) !important; color: #6ee7b7; }
[data-theme='light'] .heat-vhigh { background: #fee2e2 !important; color: #991b1b; }
[data-theme='light'] .heat-high { background: #fef2f2 !important; color: #b91c1c; }
[data-theme='light'] .heat-med { background: #fffbeb !important; color: #92400e; }
[data-theme='light'] .heat-low { background: #ecfdf5 !important; color: #065f46; }