* { box-sizing: border-box; margin: 0; padding: 0; }

    /* ===== Light-mode defaults ===== */
    :root {
      --bg: #f8fafc;
      --bg-panel: #ffffff;
      --bg-row: #f1f5f9;
      --bg-row-hover: #e2e8f0;
      --border: #e2e8f0;
      --text: #1e293b;
      --text-dim: #64748b;
      --text-muted: #94a3b8;
      --green: #16a34a;
      --red: #dc2626;
      --blue: #2563eb;
      --mono: 'JetBrains Mono', monospace;
      --sans: 'Inter', sans-serif;
      --bg-rgb: 248, 250, 252;
      --bg-panel-rgb: 255, 255, 255;
      --bg-row-rgb: 241, 245, 249;
      --bg-row-hover-rgb: 226, 232, 240;
      --border-rgb: 226, 232, 240;
      --text-rgb: 30, 41, 59;
      --text-dim-rgb: 100, 116, 139;
      --text-muted-rgb: 148, 163, 184;
      --green-rgb: 22, 163, 74;
      --red-rgb: 220, 38, 38;
      --blue-rgb: 37, 99, 235;
      --font-base: 14px;
      --heading-1: 1.9rem;
      --heading-2: 1.6rem;
      --heading-3: 1.35rem;
      --heading-4: 1.15rem;
      --heading-5: 1.05rem;
      --body: 1rem;
      --body-small: 0.95rem;
      --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.08);
      --shadow-strong: 0 10px 24px rgba(0, 0, 0, 0.12);
      --panel-radius: 12px;
    }

    /* ===== Dark-mode overrides ===== */
    html.dark {
      --bg: #0c0c0c;
      --bg-panel: #111;
      --bg-row: #161616;
      --bg-row-hover: #1a1a1a;
      --border: #222;
      --text: #e0e0e0;
      --text-dim: #666;
      --text-muted: #444;
      --green: #00c853;
      --red: #ff3d3d;
      --blue: #4a9eff;
      --bg-rgb: 12, 12, 12;
      --bg-panel-rgb: 17, 17, 17;
      --bg-row-rgb: 22, 22, 22;
      --bg-row-hover-rgb: 26, 26, 26;
      --border-rgb: 34, 34, 34;
      --text-rgb: 224, 224, 224;
      --text-dim-rgb: 102, 102, 102;
      --text-muted-rgb: 68, 68, 68;
      --green-rgb: 0, 200, 83;
      --red-rgb: 255, 61, 61;
      --blue-rgb: 74, 158, 255;
      --shadow-soft: 0 10px 24px rgba(0, 0, 0, 0.35);
      --shadow-strong: 0 20px 40px rgba(0, 0, 0, 0.45);
    }

    html, body {
      min-height: 100%;
      background: var(--bg);
      color: var(--text);
      font-family: var(--mono);
      font-size: var(--font-base);
      line-height: 1.6;
      overflow-x: hidden;
    }

    .terminal {
      display: grid;
      grid-template-rows: 32px 1fr 120px;
      height: 100vh;
      gap: 1px;
      background: var(--border);
    }

    /* Animations */
    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(-8px); }
      to { opacity: 1; transform: translateY(0); }
    }

    @keyframes slideIn {
      from { opacity: 0; transform: translateX(-10px); }
      to { opacity: 1; transform: translateX(0); }
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.6; }
    }

    @keyframes flash {
      0% { background: rgba(74, 158, 255, 0.3); }
      100% { background: transparent; }
    }

    @keyframes flashGreen {
      0% { background: rgba(0, 200, 83, 0.3); }
      100% { background: transparent; }
    }

    @keyframes flashRed {
      0% { background: rgba(255, 61, 61, 0.3); }
      100% { background: transparent; }
    }

    /* Enhanced smooth loading animations */
    @keyframes smoothSpin {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(360deg); }
    }

    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(12px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @keyframes fadeOut {
      from {
        opacity: 1;
      }
      to {
        opacity: 0;
      }
    }

    .animate-in {
      animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .animate-slide {
      animation: slideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* Smooth loading spinner */
    .spinner-smooth {
      border: 3px solid rgba(var(--blue-rgb), 0.2);
      border-top: 3px solid var(--blue);
      border-radius: 50%;
      width: 32px;
      height: 32px;
      animation: smoothSpin 0.8s cubic-bezier(0.4, 0, 0.2, 1) infinite;
      transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .spinner-smooth.fade-in {
      animation: smoothSpin 0.8s cubic-bezier(0.4, 0, 0.2, 1) infinite, fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .spinner-smooth.fade-out {
      opacity: 0;
      transform: scale(0.9);
    }

    /* Loading state transitions */
    .loading-state {
      opacity: 0;
      animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    }

    .loading-state.fade-out {
      animation: fadeOut 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    }

    /* Content loading transitions */
    .content-loading {
      opacity: 0.5;
      pointer-events: none;
      transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .content-loaded {
      opacity: 1;
      animation: fadeInUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* Button loading state */
    button.loading-state,
    .btn.loading-state {
      position: relative;
      color: transparent;
      pointer-events: none;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    button.loading-state::after,
    .btn.loading-state::after {
      content: '';
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 18px;
      height: 18px;
      border: 2px solid rgba(var(--text-rgb), 0.3);
      border-top: 2px solid var(--text);
      border-radius: 50%;
      animation: smoothSpin 0.6s cubic-bezier(0.4, 0, 0.2, 1) infinite;
    }

    .value-updated {
      animation: flash 0.6s ease-out;
    }

    .value-up {
      animation: flashGreen 0.6s ease-out;
    }

    .value-down {
      animation: flashRed 0.6s ease-out;
    }

    /* Header Bar */
    .header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 12px;
      background: var(--bg-panel);
      font-size: 10px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--text-dim);
    }

    .brand-name {
      color: var(--green);
      font-weight: 600;
      letter-spacing: 1px;
    }

    .header-stats {
      display: flex;
      gap: 20px;
      color: var(--text-dim);
    }

    .header-stats span { color: var(--text); }
    .header-stats .green { color: var(--green); }
    .header-stats .red { color: var(--red); }

    /* Pending count with hover dropdown */
    .pending-wrapper {
      position: relative;
      display: inline-block;
    }

    .pending-wrapper:hover .pending-dropdown {
      display: flex;
    }

    .pending-dropdown {
      display: none;
      position: absolute;
      top: 100%;
      left: 50%;
      transform: translateX(-50%);
      margin-top: 4px;
      background: var(--bg-panel);
      border: 1px solid var(--border);
      padding: 4px;
      z-index: 50;
      white-space: nowrap;
      gap: 4px;
    }

    .pending-dropdown button {
      padding: 4px 8px;
      border: 1px solid var(--border);
      background: transparent;
      color: var(--text-dim);
      font-family: var(--mono);
      font-size: 9px;
      cursor: pointer;
      transition: all 0.15s;
    }

    .pending-dropdown button:disabled { opacity: 0.4; cursor: not-allowed; }

    .pending-dropdown .pending-approve {
      border-color: var(--green);
      color: var(--green);
    }

    .pending-dropdown .pending-approve:hover:not(:disabled) {
      background: var(--green);
      color: var(--bg);
    }

    .pending-dropdown .pending-reject {
      border-color: var(--red);
      color: var(--red);
    }

    .pending-dropdown .pending-reject:hover:not(:disabled) {
      background: var(--red);
      color: var(--bg);
    }

    .header-controls {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .status-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--red);
      transition: all 0.3s ease;
    }

    .status-dot.active {
      background: var(--green);
      box-shadow: 0 0 8px var(--green);
    }

    .btn {
      padding: 4px 10px;
      border: 1px solid var(--border);
      background: transparent;
      color: var(--text-dim);
      font-family: var(--mono);
      font-size: 10px;
      cursor: pointer;
      transition: all 0.15s;
    }

    .btn:hover:not(:disabled) {
      border-color: var(--text-dim);
      color: var(--text);
    }

    .btn:disabled {
      opacity: 0.3;
      cursor: not-allowed;
    }

    .btn.active {
      border-color: var(--green);
      color: var(--green);
    }

    .btn.btn-start.active {
      border-color: var(--green);
      color: var(--green);
      background: rgba(0, 200, 83, 0.1);
    }

    .btn.btn-stop.active {
      border-color: var(--red);
      color: var(--red);
      background: rgba(255, 61, 61, 0.1);
    }

    /* Main Content */
    .main {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1px;
      background: var(--border);
      overflow: hidden;
    }

    .panel {
      background: var(--bg-panel);
      display: flex;
      flex-direction: column;
      overflow: hidden;
    }

    .panel-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 8px 12px;
      border-bottom: 1px solid var(--border);
      font-size: 10px;
      color: var(--text-dim);
      text-transform: uppercase;
      letter-spacing: 0.5px;
      flex-shrink: 0;
    }

    .panel-header .count {
      color: var(--text-muted);
    }

    .panel-body {
      flex: 1;
      overflow-y: auto;
      overflow-x: hidden;
    }

    .panel-body::-webkit-scrollbar { width: 4px; }
    .panel-body::-webkit-scrollbar-track { background: transparent; }
    .panel-body::-webkit-scrollbar-thumb { background: var(--border); }

    /* Signal Row - Compact one-liner */
    .signal-row {
      display: flex;
      align-items: center;
      gap: 6px;
      padding: 2px 10px;
      border-bottom: 1px solid var(--border);
      font-size: 10px;
      line-height: 1;
      position: relative;
    }

    .signal-row:hover { background: var(--bg-row-hover); }

    .signal-row.blocked {
      opacity: 0.6;
      background: var(--bg-row);
    }

    .signal-row.blocked:hover {
      opacity: 0.8;
      background: var(--bg-row-hover);
    }

    .signal-tag {
      padding: 0 5px;
      background: var(--bg-row);
      border: 1px solid var(--border);
      color: var(--blue);
      font-size: 9px;
      cursor: pointer;
      flex-shrink: 0;
      line-height: 1.4;
      display: inline-flex;
      align-items: center;
      height: 14px;
      text-decoration: none;
    }

    .signal-tag:hover { border-color: var(--blue); }

    .signal-side {
      font-size: 9px;
      font-weight: 500;
      flex-shrink: 0;
      line-height: 1.4;
    }

    .signal-side.buy { color: var(--green); }
    .signal-side.sell { color: var(--red); }

    .signal-question {
      flex: 1;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      color: var(--text);
      line-height: 1.4;
    }

    .signal-link {
      text-decoration: none;
      color: var(--text);
    }

    .signal-link:hover { color: var(--blue); }

    .signal-calc {
      font-size: 9px;
      color: var(--text-muted);
      flex-shrink: 0;
      white-space: nowrap;
      line-height: 1.4;
    }

    .signal-calc span { color: var(--text-dim); }

    /* Signal Tooltip */
    .signal-tooltip {
      display: none;
      position: fixed;
      background: var(--bg-panel);
      border: 1px solid var(--border);
      padding: 6px;
      z-index: 10000;
      min-width: 320px;
      max-width: 400px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
      font-size: 8px;
      line-height: 1.2;
      opacity: 1;
      pointer-events: auto;
      left: 0;
      top: 0;
    }

    .tooltip-section {
      margin-bottom: 3px;
    }

    .tooltip-section:last-child {
      margin-bottom: 0;
    }

    .tooltip-title {
      color: var(--blue);
      font-weight: 600;
      margin-bottom: 2px;
      text-transform: uppercase;
      font-size: 7px;
      letter-spacing: 0.5px;
    }

    .tooltip-row {
      display: flex;
      justify-content: space-between;
      padding: 0;
      color: var(--text-dim);
      font-size: 8px;
    }

    .tooltip-label {
      color: var(--text-muted);
    }

    .tooltip-value {
      color: var(--text);
      font-weight: 500;
      text-align: right;
    }

    .tooltip-value.green { color: var(--green); }
    .tooltip-value.red { color: var(--red); }
    .tooltip-value.blue { color: var(--blue); }

    .tooltip-step {
      display: flex;
      justify-content: space-between;
      padding: 0;
      padding-left: 10px;
      color: var(--text-dim);
      font-size: 7px;
    }

    .tooltip-step.active {
      color: var(--text);
      font-weight: 500;
    }

    .tooltip-step-number {
      color: var(--text-muted);
      margin-right: 4px;
    }

    .tooltip-divider {
      height: 1px;
      background: var(--border);
      margin: 2px 0;
    }

    .signal-actions {
      display: flex;
      gap: 4px;
      flex-shrink: 0;
      align-items: center;
      line-height: 1.4;
      height: 18px;
    }

    .signal-actions button {
      padding: 0;
      border: 1px solid transparent;
      border-radius: 3px;
      background: transparent;
      font-family: var(--mono);
      font-size: 10px;
      cursor: pointer;
      opacity: 0.7;
      transition: all 0.15s ease;
      width: 18px;
      height: 18px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      line-height: 1;
      flex-shrink: 0;
    }

    .signal-actions button:hover {
      opacity: 1;
      transform: scale(1.1);
    }

    .signal-actions .approve {
      color: var(--green);
    }

    .signal-actions .approve:hover {
      background: rgba(0, 200, 83, 0.15);
      border-color: var(--green);
    }

    .signal-actions .reject {
      color: var(--red);
    }

    .signal-actions .reject:hover {
      background: rgba(255, 61, 61, 0.15);
      border-color: var(--red);
    }

    /* Position Row - Compact one-liner */
    .pos-row {
      display: flex;
      align-items: center;
      gap: 6px;
      padding: 6px 10px;
      border-bottom: 1px solid var(--border);
      font-size: 10px;
      line-height: 1;
    }

    .pos-row:hover { background: var(--bg-row-hover); }

    .pos-outcome {
      font-size: 9px;
      font-weight: 500;
      flex-shrink: 0;
      width: 24px;
      line-height: 1;
    }

    .pos-outcome.yes { color: var(--green); }
    .pos-outcome.no { color: var(--red); }

    .pos-market {
      flex: 1;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      color: var(--text);
      line-height: 1;
    }

    .pos-calc {
      font-size: 9px;
      color: var(--text-muted);
      flex-shrink: 0;
      white-space: nowrap;
      line-height: 1;
    }

    .pos-calc span { color: var(--text-dim); }

    .pos-pnl {
      font-size: 9px;
      font-weight: 500;
      flex-shrink: 0;
      min-width: 50px;
      text-align: right;
      line-height: 1;
    }

    .pos-pnl.positive { color: var(--green); }
    .pos-pnl.negative { color: var(--red); }

    .pos-close {
      padding: 1px 4px;
      border: none;
      background: transparent;
      color: var(--text-muted);
      font-family: var(--mono);
      font-size: 8px;
      cursor: pointer;
      opacity: 0.5;
    }

    .pos-close:hover { color: var(--red); opacity: 1; }

    /* Active filter indicator */
    .filter-active {
      display: flex;
      align-items: center;
      gap: 4px;
      padding: 2px 6px;
      background: var(--blue);
      color: var(--bg);
      font-size: 9px;
      margin-right: 8px;
    }

    .filter-active .clear {
      cursor: pointer;
      opacity: 0.7;
    }

    .filter-active .clear:hover { opacity: 1; }

    /* Wallet Section */
    .wallet-section {
      border-top: 1px solid var(--border);
      padding: 8px 12px;
      flex-shrink: 0;
    }

    .wallet-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 6px;
      font-size: 10px;
      color: var(--text-dim);
    }

    .wallet-list {
      display: flex;
      flex-wrap: wrap;
      gap: 4px;
    }

    .wallet-tag {
      display: flex;
      align-items: center;
      gap: 4px;
      padding: 2px 6px;
      background: var(--bg-row);
      border: 1px solid var(--border);
      font-size: 9px;
      color: var(--text-dim);
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .wallet-tag:hover { border-color: var(--text-dim); }

    .wallet-tag.active {
      border-color: var(--blue);
      color: var(--blue);
      background: rgba(74, 158, 255, 0.15);
      box-shadow: 0 0 8px rgba(74, 158, 255, 0.3);
    }

    .wallet-tag .nickname { color: var(--text); }

    .add-wallet {
      padding: 2px 6px;
      border: 1px dashed var(--border);
      background: transparent;
      color: var(--text-muted);
      font-family: var(--mono);
      font-size: 9px;
      cursor: pointer;
    }

    .add-wallet:hover { border-color: var(--text-dim); color: var(--text-dim); }

    /* Footer Event Stream */
    .footer {
      display: grid;
      grid-template-columns: 1fr 280px;
      gap: 1px;
      background: var(--border);
    }

    .event-stream {
      background: var(--bg-panel);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .event-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 6px 12px;
      border-bottom: 1px solid var(--border);
      font-size: 10px;
      color: var(--text-dim);
      flex-shrink: 0;
    }

    .event-list {
      flex: 1;
      overflow-y: auto;
      padding: 4px 0;
    }

    .event-item {
      display: flex;
      gap: 8px;
      padding: 3px 12px;
      font-size: 10px;
      color: var(--text-dim);
      align-items: center;
      min-width: 0;
      width: 100%;
      box-sizing: border-box;
    }

    .event-time {
      color: var(--text-muted);
      flex-shrink: 0;
      white-space: nowrap;
      text-align: left;
    }
    .event-type {
      color: var(--blue);
      flex-shrink: 0;
      white-space: nowrap;
      text-align: left;
    }
    .event-type.error { color: var(--red); }
    .event-type.trade { color: var(--green); }

    .event-msg {
      flex: 1 1 auto;
      min-width: 0;
      overflow: hidden;
      cursor: pointer;
      transition: all 0.15s ease;
      white-space: nowrap;
      text-overflow: ellipsis;
      display: block;
      line-height: 1.4;
      text-align: right;
      margin-left: auto;
    }

    .event-msg > * {
      display: inline;
      white-space: nowrap;
    }

    .event-msg:hover {
      color: var(--text);
    }

    .event-msg.expanded {
      display: block;
      white-space: pre-wrap;
      word-break: break-all;
      background: var(--bg-row);
      padding: 4px 6px;
      border-radius: 2px;
      margin-top: 2px;
      max-height: 140px;
      overflow: auto;
    }

    .event-item.expandable {
      cursor: pointer;
    }

    .event-item.expandable:hover {
      background: var(--bg-row-hover);
    }

    .event-item.new {
      animation: fadeIn 0.2s ease-out, flash 0.6s ease-out;
    }

    .signal-row.new {
      animation: slideIn 0.25s ease-out, flash 0.6s ease-out;
    }

    .event-expand-hint {
      color: var(--text-muted);
      font-size: 8px;
      margin-left: 4px;
      flex-shrink: 0;
    }

    /* Event Log Tabs */
    .event-tabs {
      display: flex;
      gap: 2px;
    }

    .event-tab {
      padding: 2px 6px;
      border: 1px solid var(--border);
      background: transparent;
      color: var(--text-muted);
      font-family: var(--mono);
      font-size: 9px;
      cursor: pointer;
      transition: all 0.15s;
    }

    .event-tab:hover {
      color: var(--text-dim);
      border-color: var(--text-dim);
    }

    .event-tab.active {
      border-color: var(--blue);
      color: var(--blue);
      background: rgba(74, 158, 255, 0.1);
    }

    /* Summary Panel */
    .summary-panel {
      background: var(--bg-panel);
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .summary-row {
      display: flex;
      justify-content: space-between;
      font-size: 10px;
    }

    .summary-label { color: var(--text-dim); }
    .summary-value {
      color: var(--text);
      font-weight: 500;
      transition: all 0.3s ease;
    }
    .summary-value.green { color: var(--green); }
    .summary-value.red { color: var(--red); }
    .summary-value.flash-up {
      animation: flashGreen 0.6s ease-out;
    }
    .summary-value.flash-down {
      animation: flashRed 0.6s ease-out;
    }

    /* Empty State */
    .empty {
      display: flex;
      align-items: center;
      justify-content: center;
      height: 100%;
      color: var(--text-muted);
      font-size: 10px;
    }

    /* Modal */
    .modal-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.8);
      display: none;
      align-items: center;
      justify-content: center;
      z-index: 100;
    }

    .modal-overlay.show { display: flex; }

    .modal {
      background: var(--bg-panel);
      border: 1px solid var(--border);
      padding: 16px;
      min-width: 300px;
    }

    .modal-title {
      font-size: 11px;
      color: var(--text);
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .modal input {
      width: 100%;
      padding: 8px;
      margin-bottom: 8px;
      background: var(--bg);
      border: 1px solid var(--border);
      color: var(--text);
      font-family: var(--mono);
      font-size: 11px;
    }

    .modal input:focus { outline: none; border-color: var(--text-dim); }

    .modal-actions {
      display: flex;
      gap: 8px;
      justify-content: flex-end;
      margin-top: 12px;
    }

    /* ------------------------------------------------------------------
       Student Receipt App Theme
       ------------------------------------------------------------------ */

    /* Typography */
    h1, .h1 { font-size: var(--heading-1); line-height: 1.25; font-weight: 800; }
    h2, .h2 { font-size: var(--heading-2); line-height: 1.28; font-weight: 750; }
    h3, .h3 { font-size: var(--heading-3); line-height: 1.32; font-weight: 700; }
    h4, .h4 { font-size: var(--heading-4); line-height: 1.38; font-weight: 650; }
    h5, .h5 { font-size: var(--heading-5); line-height: 1.42; font-weight: 600; }
    p, .text-base, .body-text { font-size: var(--body); }
    .text-sm { font-size: var(--body-small); }
    .nav-label { font-size: 12px; }

    body {
      background: radial-gradient(circle at 15% 20%, rgba(var(--blue-rgb), 0.08), transparent 26%), radial-gradient(circle at 80% 10%, rgba(var(--green-rgb), 0.06), transparent 22%), linear-gradient(180deg, rgba(var(--bg-rgb), 0.94), rgba(var(--bg-panel-rgb), 0.94));
      color: var(--text);
      font-family: var(--mono);
      letter-spacing: 0.01em;
    }

    a {
      color: rgba(var(--blue-rgb), 0.9);
      text-decoration: none;
      transition: color 0.2s ease;
    }

    a:hover {
      color: var(--blue);
    }

    /* Password field positioning (theme-independent) */
    .password-field-wrap {
      position: relative;
      display: block;
    }

    .password-field-input {
      padding-right: 2.75rem;
    }

    .password-toggle-btn {
      position: absolute;
      top: 50%;
      right: 0.625rem;
      transform: translateY(-50%);
      width: 1.25rem;
      height: 1.25rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 0;
      border-radius: 0;
      background: transparent;
      box-shadow: none;
      padding: 0;
      margin: 0;
      color: var(--text-dim);
      cursor: pointer;
      z-index: 2;
      line-height: 1;
      vertical-align: middle;
      float: none;
    }

    .password-toggle-btn:hover,
    .password-toggle-btn:focus {
      color: var(--text);
      border: 0;
      background: transparent;
      box-shadow: none;
      outline: none;
    }

    .password-toggle-btn i {
      font-size: 0.875rem;
      line-height: 1;
      display: block;
    }

    /* ------------------------------------------------------------------
       Dark-mode component overrides (only apply when html has .dark class)
       ------------------------------------------------------------------ */

    html.dark .header-gradient {
      background: linear-gradient(90deg, rgba(var(--bg-panel-rgb), 0.95), rgba(var(--bg-row-rgb), 0.95));
      border-bottom: 1px solid var(--border);
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
      color: var(--text);
    }

    html.dark .header-gradient .text-white,
    html.dark .header-gradient .text-blue-100,
    html.dark .header-gradient .text-blue-50,
    html.dark .header-gradient .text-sm,
    html.dark .header-gradient .text-base {
      color: var(--text);
    }

    html.dark .header-gradient .bg-blue-600,
    html.dark .header-gradient .bg-blue-700 {
      background: rgba(var(--blue-rgb), 0.16);
      border: 1px solid rgba(var(--blue-rgb), 0.45);
      color: var(--text);
      box-shadow: inset 0 1px 0 rgba(var(--blue-rgb), 0.35);
    }

    html.dark .header-gradient .bg-blue-600:hover,
    html.dark .header-gradient .bg-blue-700:hover {
      background: rgba(var(--blue-rgb), 0.25);
      color: var(--text);
    }

    html.dark .header-gradient .bg-red-500,
    html.dark .header-gradient .bg-red-600 {
      background: rgba(var(--red-rgb), 0.18);
      border: 1px solid rgba(var(--red-rgb), 0.45);
      color: var(--text);
    }

    html.dark .header-gradient .bg-red-500:hover,
    html.dark .header-gradient .bg-red-600:hover {
      background: rgba(var(--red-rgb), 0.26);
    }

    html.dark .sidebar {
      background: linear-gradient(180deg, rgba(var(--bg-panel-rgb), 0.98), rgba(var(--bg-row-rgb), 0.98));
      border-right: 1px solid var(--border);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
      color: var(--text);
    }

    html.dark .sidebar-shell {
      background: rgba(var(--bg-rgb), 0.4);
      border: 1px solid var(--border);
      border-radius: var(--panel-radius);
      padding: 10px;
      box-shadow: inset 0 1px 0 rgba(var(--text-rgb), 0.08);
    }

    html.dark body.sidebar-collapsed .content-area {
      margin-left: 5.5rem;
    }

    html.dark .content-area {
      background: linear-gradient(180deg, rgba(var(--bg-rgb), 0.95), rgba(var(--bg-rgb), 0.98));
    }

    html.dark .main-content {
      padding: 24px;
      background: radial-gradient(circle at 20% 0%, rgba(var(--blue-rgb), 0.08), transparent 30%);
    }

    html.dark .card,
    html.dark .panel,
    html.dark .panel-primary,
    html.dark .panel-secondary {
      background: var(--bg-panel);
      border: 1px solid var(--border);
      border-radius: var(--panel-radius);
      box-shadow: var(--shadow-soft);
      color: var(--text);
    }

    html.dark .card h1,
    html.dark .card h2,
    html.dark .card h3,
    html.dark .card h4 {
      color: var(--text);
      letter-spacing: 0.01em;
    }

    html.dark .panel-header {
      background: var(--bg-row);
      border-bottom: 1px solid var(--border);
      color: var(--text-dim);
      text-transform: uppercase;
      letter-spacing: 0.08em;
    }

    html.dark .panel-content,
    html.dark .card .p-6,
    html.dark .card .p-4 {
      color: var(--text);
    }

    html.dark .nav-item,
    html.dark .nav-group-toggle {
      background: rgba(var(--bg-row-rgb), 0.8);
      border: 1px solid var(--border);
      border-radius: 10px;
      color: var(--text);
      transition: all 0.18s ease;
      box-shadow: inset 0 1px 0 rgba(var(--text-rgb), 0.05);
    }

    /* Main-level navigation should feel stronger than submenu links */
    html.dark .space-y-3 > .nav-item,
    html.dark .nav-group > .nav-group-toggle {
      font-size: 13px;
      font-weight: 700;
    }

    html.dark .nav-item:hover,
    html.dark .nav-group-toggle:hover {
      color: var(--text);
      background: rgba(var(--bg-row-rgb), 0.95);
      border-color: rgba(var(--blue-rgb), 0.35);
      transform: translateX(4px);
    }

    html.dark .nav-item.active {
      border-color: rgba(var(--blue-rgb), 0.6);
      color: var(--text);
      box-shadow: 0 0 0 1px rgba(var(--blue-rgb), 0.3), inset 0 1px 0 rgba(var(--blue-rgb), 0.15);
      background: rgba(var(--bg-row-rgb), 0.9);
    }

    html.dark .nav-submenu {
      background: rgba(var(--bg-row-rgb), 0.6);
      border: 1px dashed rgba(var(--border-rgb), 0.8);
      border-radius: 12px;
      padding: 8px 10px;
    }

    /* Sidebar submenu left border - grey-ish instead of bright white */
    html.dark .nav-submenu.border-l,
    html.dark .nav-submenu[class*="border-l"],
    html.dark .nav-submenu.border-gray-200 {
      border-left-color: rgba(var(--text-dim-rgb), 0.35);
    }

    html.dark .nav-submenu .nav-item {
      background: rgba(var(--bg-panel-rgb), 0.8);
      font-size: 11.5px;
      font-weight: 500;
      color: rgba(var(--text-rgb), 0.82);
      padding-top: 0.52rem;
      padding-bottom: 0.52rem;
    }

    html.dark .nav-label,
    html.dark .nav-group .nav-label {
      color: var(--text);
      font-weight: 600;
      letter-spacing: 0.05em;
      font-size: 12px;
    }

    html.dark .nav-submenu .nav-label {
      color: rgba(var(--text-rgb), 0.82);
      font-size: 11px;
      font-weight: 500;
      letter-spacing: 0.03em;
    }

    html.dark .sidebar .nav-item i,
    html.dark .sidebar .nav-group-toggle i,
    html.dark .sidebar .nav-chevron {
      color: rgba(var(--text-rgb), 0.88);
    }

    html.dark .breadcrumbs {
      background: rgba(var(--bg-row-rgb), 0.8);
      border: 1px solid var(--border);
      padding: 8px 12px;
      border-radius: 10px;
      color: var(--text-dim);
      box-shadow: inset 0 1px 0 rgba(var(--text-rgb), 0.05);
    }

    html.dark .breadcrumbs a {
      color: rgba(var(--text-rgb), 0.8);
    }

    html.dark .breadcrumbs a:hover {
      color: var(--blue);
    }

    html.dark .btn,
    html.dark button,
    html.dark .btn-primary,
    html.dark .btn-secondary,
    html.dark .btn-success,
    html.dark .btn-danger {
      border-radius: 10px;
      font-weight: 700;
      letter-spacing: 0.04em;
      border: 1px solid var(--border);
      background: rgba(var(--bg-row-rgb), 0.9);
      color: var(--text);
      transition: all 0.18s ease;
      box-shadow: inset 0 1px 0 rgba(var(--text-rgb), 0.06);
    }

    html.dark .btn:hover,
    html.dark button:hover {
      border-color: rgba(var(--blue-rgb), 0.4);
      box-shadow: 0 8px 18px rgba(0, 0, 0, 0.35);
    }

    html.dark .btn-primary {
      background: rgba(var(--blue-rgb), 0.2);
      border-color: rgba(var(--blue-rgb), 0.6);
      color: var(--text);
    }

    html.dark .btn-primary:hover {
      background: rgba(var(--blue-rgb), 0.3);
    }

    html.dark .btn-success {
      background: rgba(var(--green-rgb), 0.15);
      border-color: rgba(var(--green-rgb), 0.6);
      color: var(--text);
    }

    html.dark .btn-danger {
      background: rgba(var(--red-rgb), 0.15);
      border-color: rgba(var(--red-rgb), 0.7);
      color: var(--text);
    }

    html.dark .btn-secondary {
      background: rgba(var(--bg-row-rgb), 0.6);
      border-color: rgba(var(--border-rgb), 0.9);
      color: var(--text);
    }

    html.dark .shadow-lg {
      box-shadow: var(--shadow-strong);
    }

    html.dark .badge-paid,
    html.dark .badge-success {
      background: rgba(var(--green-rgb), 0.12);
      color: var(--text);
      border: 1px solid rgba(var(--green-rgb), 0.5);
    }

    html.dark .badge-pending,
    html.dark .badge-warning {
      background: rgba(var(--blue-rgb), 0.12);
      color: var(--text);
      border: 1px dashed rgba(var(--blue-rgb), 0.5);
    }

    html.dark .badge-overdue,
    html.dark .badge-danger {
      background: rgba(var(--red-rgb), 0.12);
      color: var(--text);
      border: 1px solid rgba(var(--red-rgb), 0.5);
    }

    html.dark input,
    html.dark select,
    html.dark textarea {
      background: rgba(var(--bg-row-rgb), 0.9);
      border: 1px solid var(--border);
      color: var(--text);
      border-radius: 10px;
      padding: 10px 12px;
      outline: none;
      transition: all 0.18s ease;
    }

    html.dark input:focus,
    html.dark select:focus,
    html.dark textarea:focus {
      border-color: rgba(var(--blue-rgb), 0.6);
      box-shadow: 0 0 0 2px rgba(var(--blue-rgb), 0.2);
    }

    html.dark input::placeholder,
    html.dark textarea::placeholder {
      color: rgba(var(--text-dim-rgb), 0.8);
    }

    html.dark table {
      width: 100%;
      background: var(--bg-panel);
      border-collapse: collapse;
      border: 1px solid var(--border);
      color: var(--text);
      box-shadow: var(--shadow-soft);
    }

    html.dark th,
    html.dark td {
      border-bottom: 1px solid var(--border);
      padding: 10px;
    }

    html.dark th {
      text-transform: uppercase;
      letter-spacing: 0.08em;
      font-size: 11px;
      color: var(--text-dim);
      background: rgba(var(--bg-row-rgb), 0.7);
    }

    html.dark tbody tr:nth-child(odd) {
      background: rgba(var(--bg-row-rgb), 0.6);
    }

    html.dark tbody tr:hover {
      background: rgba(var(--bg-row-hover-rgb, 26, 26, 26), 0.9);
    }

    html.dark .table-enhanced {
      border-radius: var(--panel-radius);
      overflow: hidden;
    }

    html.dark .table-header {
      background: rgba(var(--bg-row-rgb), 0.6);
      border-bottom: 1px solid var(--border);
    }

    html.dark .table-row-hover tbody tr:hover {
      background: rgba(var(--bg-row-rgb), 0.85);
    }

    html.dark .status-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 10px;
      border-radius: 999px;
      font-weight: 700;
      letter-spacing: 0.04em;
      background: rgba(var(--bg-row-rgb), 0.75);
      border: 1px solid var(--border);
      color: var(--text);
    }

    html.dark .status-pill.success { border-color: rgba(var(--green-rgb), 0.6); color: var(--green); }
    html.dark .status-pill.danger { border-color: rgba(var(--red-rgb), 0.7); color: var(--red); }
    html.dark .status-pill.info { border-color: rgba(var(--blue-rgb), 0.6); color: var(--blue); }

    html.dark .info-card {
      background: linear-gradient(135deg, rgba(var(--bg-row-rgb), 0.9), rgba(var(--bg-panel-rgb), 0.9));
      border: 1px solid var(--border);
      box-shadow: var(--shadow-soft);
    }

    html.dark .stat-value {
      font-size: 28px;
      font-weight: 800;
      color: var(--text);
    }

    html.dark .stat-label {
      color: var(--text-dim);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      font-size: 11px;
    }

    html.dark .tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 10px;
      background: rgba(var(--bg-row-rgb), 0.8);
      border: 1px solid var(--border);
      color: var(--text);
      border-radius: 999px;
      font-weight: 600;
      letter-spacing: 0.03em;
    }

    html.dark .tag .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--blue);
      box-shadow: 0 0 12px rgba(var(--blue-rgb), 0.8);
    }

    /* Fee management palette overrides */
    html.dark .fee-management-shell {
      background: var(--bg);
      color: var(--text);
    }

    html.dark .fee-management-shell .container {
      background: rgba(var(--bg-panel-rgb), 0.92);
      border: 1px solid var(--border);
      border-radius: var(--panel-radius);
      box-shadow: var(--shadow-soft);
    }

    html.dark .fee-management-shell .student-header {
      background: rgba(var(--blue-rgb), 0.12);
      border: 1px solid rgba(var(--blue-rgb), 0.45);
      color: var(--text);
      box-shadow: inset 0 1px 0 rgba(var(--text-rgb), 0.08);
    }

    html.dark .fee-management-shell .student-name { color: var(--blue); }
    html.dark .fee-management-shell .student-id { color: rgba(var(--green-rgb), 0.85); }
    html.dark .fee-management-shell .student-details { color: rgba(var(--text-rgb), 0.76); }

    html.dark .fee-management-shell .tab-navigation {
      background: rgba(var(--bg-row-rgb), 0.8);
      border: 1px solid var(--border);
      border-radius: 10px;
      box-shadow: inset 0 1px 0 rgba(var(--text-rgb), 0.05);
    }

    html.dark .fee-management-shell .tab-button {
      color: var(--text-dim);
      border-radius: 10px;
    }

    html.dark .fee-management-shell .tab-button.active {
      background: rgba(var(--blue-rgb), 0.22);
      color: var(--text);
      box-shadow: 0 0 0 1px rgba(var(--blue-rgb), 0.35);
    }

    html.dark .fee-management-shell .tab-button:hover:not(.active) {
      background: rgba(var(--bg-row-rgb), 0.92);
      color: var(--text);
    }

    html.dark .app-shell .data-table,
    html.dark .fee-management-shell .data-table {
      background: var(--bg-panel);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-soft);
    }

    html.dark .app-shell .data-table thead,
    html.dark .fee-management-shell .data-table thead {
      background: rgba(var(--bg-row-rgb), 0.8);
    }

    html.dark .app-shell .data-table th,
    html.dark .fee-management-shell .data-table th {
      color: var(--text-dim);
      border-bottom: 1px solid var(--border);
    }

    html.dark .app-shell .data-table td,
    html.dark .fee-management-shell .data-table td {
      border-bottom: 1px solid var(--border);
      color: var(--text);
    }

    html.dark .app-shell .data-table tbody tr:hover,
    html.dark .fee-management-shell .data-table tbody tr:hover {
      background: rgba(var(--bg-row-hover-rgb), 0.8);
    }

    html.dark .app-shell .status-paid,
    html.dark .fee-management-shell .status-paid {
      background: rgba(var(--green-rgb), 0.12);
      color: var(--text);
      border-left: 4px solid var(--green);
    }

    html.dark .app-shell .status-partial,
    html.dark .fee-management-shell .status-partial {
      background: rgba(var(--blue-rgb), 0.12);
      color: var(--text);
      border-left: 4px solid var(--blue);
    }

    html.dark .app-shell .status-unpaid,
    html.dark .fee-management-shell .status-unpaid {
      background: rgba(var(--red-rgb), 0.14);
      color: var(--text);
      border-left: 4px solid var(--red);
    }

    html.dark .fee-management-shell .form-input {
      background: rgba(var(--bg-row-rgb), 0.9);
      border: 1px solid var(--border);
      color: var(--text);
    }

    html.dark .fee-management-shell .form-input:focus {
      border-color: rgba(var(--blue-rgb), 0.6);
      box-shadow: 0 0 0 2px rgba(var(--blue-rgb), 0.2);
    }

    html.dark .fee-management-shell .calendar-button {
      background: rgba(var(--bg-row-rgb), 0.8);
      color: var(--text);
      border: 1px solid var(--border);
    }

    html.dark .fee-management-shell .calendar-button:hover {
      background: rgba(var(--blue-rgb), 0.2);
      color: var(--text);
    }

    /* Student management form controls */
    html.dark .student-management input:not([type="hidden"]):not(:disabled):not([readonly]),
    html.dark .student-management select:enabled,
    html.dark .student-management textarea:enabled {
      background: rgba(var(--bg-row-rgb), 0.92);
      color: var(--text);
      border: 1px solid rgba(var(--text-rgb), 0.6);
      box-shadow: inset 0 1px 0 rgba(var(--text-rgb), 0.05);
    }

    html.dark .student-management input[readonly],
    html.dark .student-management input:disabled,
    html.dark .student-management select:disabled,
    html.dark .student-management textarea:disabled {
      background: rgba(var(--bg-row-rgb), 0.55);
      color: rgba(var(--text-rgb), 0.6);
      border: 1px solid rgba(var(--text-rgb), 0.25);
      cursor: not-allowed;
      opacity: 0.7;
    }

    /* Remove focus rings and red circles from readonly/disabled fields */
    html.dark .student-management input[readonly],
    html.dark .student-management input[readonly]:focus,
    html.dark .student-management input:disabled,
    html.dark .student-management input:disabled:focus,
    html.dark .student-management select:disabled,
    html.dark .student-management select:disabled:focus,
    html.dark .student-management textarea:disabled,
    html.dark .student-management textarea:disabled:focus {
      outline: none;
      border-color: rgba(var(--text-rgb), 0.25);
      box-shadow: none;
      /* ring: none — removed, not valid CSS */
      --tw-ring-width: 0;
      --tw-ring-offset-width: 0;
    }

    /* ------------------------------------------------------------------
       Light-mode fixes for hardcoded dark Tailwind classes
       Used by pages (login, forgot_password, student_management)
       that hardcode dark utility classes without dark: prefix.
       ------------------------------------------------------------------ */

    /* Form fields with dark bg classes → light surface in light mode */
    html:not(.dark) input.bg-gray-800,
    html:not(.dark) input.bg-gray-900,
    html:not(.dark) select.bg-gray-800,
    html:not(.dark) select.bg-gray-900,
    html:not(.dark) textarea.bg-gray-800,
    html:not(.dark) textarea.bg-gray-900 {
      background: #ffffff;
      color: #1e293b;
      border-color: #cbd5e1;
    }

    html:not(.dark) input.bg-gray-800::placeholder,
    html:not(.dark) input.bg-gray-900::placeholder,
    html:not(.dark) textarea.bg-gray-800::placeholder,
    html:not(.dark) textarea.bg-gray-900::placeholder {
      color: #94a3b8;
    }

    html:not(.dark) input.bg-gray-800:focus,
    html:not(.dark) input.bg-gray-900:focus,
    html:not(.dark) select.bg-gray-800:focus,
    html:not(.dark) select.bg-gray-900:focus,
    html:not(.dark) textarea.bg-gray-800:focus,
    html:not(.dark) textarea.bg-gray-900:focus {
      border-color: #3b82f6;
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
    }

    /* Readonly/disabled form fields in light mode */
    html:not(.dark) input[readonly].bg-gray-800,
    html:not(.dark) input:disabled.bg-gray-800,
    html:not(.dark) input[readonly].bg-gray-900,
    html:not(.dark) input:disabled.bg-gray-900,
    html:not(.dark) select:disabled.bg-gray-800,
    html:not(.dark) select:disabled.bg-gray-900 {
      background: #f1f5f9;
      color: #64748b;
      border-color: #e2e8f0;
      cursor: not-allowed;
    }

    /* Labels with light-on-dark text classes → dark text in light mode */
    html:not(.dark) label.text-gray-200,
    html:not(.dark) label.text-gray-300,
    html:not(.dark) label.text-gray-100,
    html:not(.dark) span.text-gray-200,
    html:not(.dark) span.text-gray-300,
    html:not(.dark) p.text-gray-200,
    html:not(.dark) p.text-gray-300,
    html:not(.dark) p.text-gray-400 {
      color: #475569;
    }

    /* Headings/text that use text-white inside dark containers */
    html:not(.dark) .bg-gray-900 .text-white,
    html:not(.dark) .bg-gray-900 h1,
    html:not(.dark) .bg-gray-900 h2,
    html:not(.dark) .bg-gray-900 h3 {
      color: #1e293b;
    }

    /* Dark card containers → light surface in light mode */
    html:not(.dark) .bg-gray-900[class*="rounded"],
    html:not(.dark) .bg-gray-900[class*="shadow"] {
      background: #ffffff;
      border-color: #e2e8f0;
      box-shadow: 0 4px 16px rgba(37, 99, 235, 0.08);
    }

    /* Table headers with dark bg in light mode */
    html:not(.dark) thead.bg-gray-800,
    html:not(.dark) thead .bg-gray-800,
    html:not(.dark) tr.bg-gray-800,
    html:not(.dark) th.bg-gray-800 {
      background: #e0e7ff;
      color: #1e293b;
    }

    html:not(.dark) tr.bg-gray-700,
    html:not(.dark) td.bg-gray-700 {
      background: #eef2f7;
      color: #1e293b;
    }

    /* Step indicators / subtle text in light mode */
    html:not(.dark) .text-indigo-300 {
      color: #4f46e5;
    }

    html:not(.dark) .text-indigo-400 {
      color: #6366f1;
    }

    /* Links styled for dark bg → proper link color in light mode */
    html:not(.dark) a.text-gray-400,
    html:not(.dark) a.text-gray-300 {
      color: #2563eb;
    }

    html:not(.dark) a.text-indigo-300,
    html:not(.dark) a.text-indigo-400 {
      color: #4f46e5;
    }

    /* Login page heading should remain visible in light mode */
    html:not(.dark) .login-page-title {
      color: #1e293b;
    }

    /* Buttons: ensure colored bg buttons stay visible in both modes */
    html:not(.dark) button.bg-gray-900,
    html:not(.dark) a.bg-gray-900 {
      background: #1e293b;
      color: #ffffff;
    }

    /* Student management input base class overrides */
    html:not(.dark) .student-management input.bg-gray-900,
    html:not(.dark) .student-management select.bg-gray-900,
    html:not(.dark) .student-management textarea.bg-gray-900 {
      background: #ffffff;
      color: #1e293b;
      border-color: #cbd5e1;
    }

    html:not(.dark) .student-management input.bg-gray-800,
    html:not(.dark) .student-management select.bg-gray-800 {
      background: #f1f5f9;
      color: #64748b;
      border-color: #e2e8f0;
    }

    html:not(.dark) .student-management .text-white {
      color: #1e293b;
    }

    /* Light background + white/light text utility conflicts */
    html:not(.dark) :is(
      .bg-gray-50, .bg-gray-100, .bg-gray-200,
      .bg-slate-50, .bg-slate-100, .bg-slate-200,
      .bg-zinc-50, .bg-zinc-100, .bg-zinc-200,
      .bg-blue-50, .bg-blue-100, .bg-blue-200,
      .bg-sky-50, .bg-sky-100, .bg-sky-200,
      .bg-cyan-50, .bg-cyan-100, .bg-cyan-200,
      .bg-indigo-50, .bg-indigo-100, .bg-indigo-200,
      .bg-purple-50, .bg-purple-100, .bg-purple-200,
      .bg-green-50, .bg-green-100, .bg-green-200,
      .bg-emerald-50, .bg-emerald-100, .bg-emerald-200,
      .bg-teal-50, .bg-teal-100, .bg-teal-200,
      .bg-yellow-50, .bg-yellow-100, .bg-yellow-200,
      .bg-amber-50, .bg-amber-100, .bg-amber-200,
      .bg-orange-50, .bg-orange-100, .bg-orange-200,
      .bg-red-50, .bg-red-100, .bg-red-200,
      .bg-pink-50, .bg-pink-100, .bg-pink-200,
      .bg-rose-50, .bg-rose-100, .bg-rose-200
    ):is(
      .text-white,
      .text-gray-50, .text-gray-100, .text-gray-200, .text-gray-300, .text-gray-400,
      .hover\:text-white:hover, .focus\:text-white:focus
    ),
    html:not(.dark) :is(
      .bg-gray-50, .bg-gray-100, .bg-gray-200,
      .bg-slate-50, .bg-slate-100, .bg-slate-200,
      .bg-zinc-50, .bg-zinc-100, .bg-zinc-200,
      .bg-blue-50, .bg-blue-100, .bg-blue-200,
      .bg-sky-50, .bg-sky-100, .bg-sky-200,
      .bg-cyan-50, .bg-cyan-100, .bg-cyan-200,
      .bg-indigo-50, .bg-indigo-100, .bg-indigo-200,
      .bg-purple-50, .bg-purple-100, .bg-purple-200,
      .bg-green-50, .bg-green-100, .bg-green-200,
      .bg-emerald-50, .bg-emerald-100, .bg-emerald-200,
      .bg-teal-50, .bg-teal-100, .bg-teal-200,
      .bg-yellow-50, .bg-yellow-100, .bg-yellow-200,
      .bg-amber-50, .bg-amber-100, .bg-amber-200,
      .bg-orange-50, .bg-orange-100, .bg-orange-200,
      .bg-red-50, .bg-red-100, .bg-red-200,
      .bg-pink-50, .bg-pink-100, .bg-pink-200,
      .bg-rose-50, .bg-rose-100, .bg-rose-200
    ) :is(
      .text-white,
      .text-gray-50, .text-gray-100, .text-gray-200, .text-gray-300, .text-gray-400,
      .hover\:text-white:hover, .focus\:text-white:focus
    ) {
      color: #1e293b;
    }

    /* ------------------------------------------------------------------
       Light-mode header, sidebar and navigation styling
       ------------------------------------------------------------------ */

    /* Header gradient — vibrant blue in light mode */
    html:not(.dark) .header-gradient {
      background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    }

    /* Header text elements */
    html:not(.dark) .header-gradient .text-blue-100 {
      color: rgba(255, 255, 255, 0.85);
    }
    html:not(.dark) .header-gradient .text-blue-50 {
      color: rgba(255, 255, 255, 0.9);
    }

    /* Theme toggle pill — more visible on blue header */
    html:not(.dark) #theme-toggle {
      background: rgba(255, 255, 255, 0.25);
      border: 1px solid rgba(255, 255, 255, 0.35);
    }

    /* Logout button — slightly brighter red on blue header */
    html:not(.dark) .header-gradient a.bg-red-500 {
      background: #ef4444;
      color: #fff;
    }
    html:not(.dark) .header-gradient a.bg-red-500:hover {
      background: #dc2626;
    }

    /* Sidebar nav items in light mode — clean look */
    html:not(.dark) .nav-item,
    html:not(.dark) .nav-group-toggle {
      color: #334155;
    }
    html:not(.dark) .nav-item:hover,
    html:not(.dark) .nav-group-toggle:hover {
      color: #2563eb;
      background-color: rgba(37, 99, 235, 0.06);
    }
    html:not(.dark) .nav-item.active,
    html:not(.dark) .nav-item.bg-blue-50,
    html:not(.dark) .nav-group-toggle.active,
    html:not(.dark) .nav-group-toggle.bg-blue-50 {
      background-color: #dbeafe;
      color: #1e3a8a;
      border: 1px solid #93c5fd;
      box-shadow: inset 3px 0 0 #2563eb;
    }

    /* Sidebar "Navigation" label */
    html:not(.dark) .sidebar .text-gray-500 {
      color: #64748b;
    }

    /* Sidebar collapse button */
    html:not(.dark) .sidebar-collapse-btn {
      color: #64748b;
      border-color: #e2e8f0;
    }
    html:not(.dark) .sidebar-collapse-btn:hover {
      color: #2563eb;
      border-color: #2563eb;
      background: #eff6ff;
    }

    /* Nav group container light styling */
    html:not(.dark) .nav-group {
      border-color: #e2e8f0;
      background: linear-gradient(135deg, rgba(255,255,255,0.96) 0%, rgba(241,245,249,0.18) 100%);
    }

    /* Submenu area */
    html:not(.dark) .nav-submenu {
      background: rgba(241, 245, 249, 0.5);
      border-color: rgba(148, 163, 184, 0.35);
    }
    html:not(.dark) .nav-submenu a,
    html:not(.dark) .nav-submenu .nav-item {
      background: rgba(255, 255, 255, 0.98);
      border-color: #e2e8f0;
      color: #334155;
    }
    html:not(.dark) .nav-submenu a:hover,
    html:not(.dark) .nav-submenu .nav-item:hover {
      color: #2563eb;
      background: #f0f7ff;
    }
    html:not(.dark) .nav-submenu a.nav-item.active,
    html:not(.dark) .nav-submenu .nav-item.active,
    html:not(.dark) .nav-submenu a.nav-item.bg-blue-50,
    html:not(.dark) .nav-submenu .nav-item.bg-blue-50 {
      background: #dbeafe;
      color: #1e3a8a;
      border-color: #93c5fd;
      box-shadow: inset 3px 0 0 #2563eb;
    }

    /* Center switch select in header */
    html:not(.dark) .header-gradient select {
      background: #ffffff;
      color: #1e293b;
      border-color: rgba(255, 255, 255, 0.4);
    }

    /* Active nav chevrons */
    html:not(.dark) .nav-chevron {
      color: #94a3b8;
    }

    /* Amber notices in sidebar */
    html:not(.dark) .bg-amber-50 {
      background: #fffbeb;
      color: #92400e;
      border-color: #fde68a;
    }

    /* eWallet badge in header */
    html:not(.dark) .header-gradient .bg-green-600 {
      background: #16a34a;
      color: #fff;
    }
    html:not(.dark) .header-gradient .bg-green-600:hover,
    html:not(.dark) .header-gradient .bg-green-700:hover {
      background: #15803d;
    }

    /* General buttons used throughout pages */
    html:not(.dark) button.bg-gray-600,
    html:not(.dark) a.bg-gray-600 {
      background: #475569;
      color: #ffffff;
    }
    html:not(.dark) button.bg-gray-600:hover,
    html:not(.dark) a.bg-gray-600:hover {
      background: #334155;
    }
    html:not(.dark) button.bg-gray-700,
    html:not(.dark) a.bg-gray-700 {
      background: #334155;
      color: #ffffff;
    }
    html:not(.dark) button.bg-gray-700:hover,
    html:not(.dark) a.bg-gray-700:hover {
      background: #1e293b;
    }

    /* Indigo/blue buttons */
    html:not(.dark) button.bg-indigo-600,
    html:not(.dark) a.bg-indigo-600 {
      background: #4f46e5;
      color: #ffffff;
    }
    html:not(.dark) button.bg-indigo-600:hover,
    html:not(.dark) a.bg-indigo-600:hover {
      background: #4338ca;
    }
    html:not(.dark) button.bg-blue-600,
    html:not(.dark) a.bg-blue-600 {
      background: #2563eb;
      color: #ffffff;
    }
    html:not(.dark) button.bg-blue-600:hover,
    html:not(.dark) a.bg-blue-600:hover {
      background: #1d4ed8;
    }

    /* ------------------------------------------------------------------
       Dark-mode Tailwind utility remaps
       ------------------------------------------------------------------ */
    html.dark .bg-white,
    html.dark .bg-gray-50,
    html.dark .bg-gray-100,
    html.dark .bg-gray-200,
    html.dark .bg-gray-300,
    html.dark .bg-gray-500,
    html.dark .bg-gray-600,
    html.dark .bg-gray-700,
    html.dark .bg-gray-800,
    html.dark .bg-gray-900,
    html.dark .bg-black {
      background: var(--bg-panel);
      color: var(--text);
    }

    /* Override for student-management - editable fields get dark background */
    html.dark .student-management .bg-gray-900:not([readonly]):not(:disabled),
    html.dark .student-management input.bg-gray-900:not([readonly]):not(:disabled),
    html.dark .student-management select.bg-gray-900:not(:disabled),
    html.dark .student-management textarea.bg-gray-900:not(:disabled) {
      background: rgba(var(--bg-row-rgb), 0.92);
      color: var(--text);
      border-color: rgba(var(--text-rgb), 0.6);
    }

    /* Override for student-management - readonly fields get greyed out */
    html.dark .student-management .bg-gray-800,
    html.dark .student-management input.bg-gray-800,
    html.dark .student-management input[readonly].bg-gray-900,
    html.dark .student-management input:disabled.bg-gray-900,
    html.dark .student-management select:disabled.bg-gray-900,
    html.dark .student-management textarea:disabled.bg-gray-900 {
      background: rgba(var(--bg-row-rgb), 0.55);
      color: rgba(var(--text-rgb), 0.6);
      border-color: rgba(var(--text-rgb), 0.25);
      opacity: 0.7;
    }

    /* Override Tailwind border-gray classes for student-management inputs - make them whiter */
    html.dark .student-management input.border-gray-700:not([readonly]):not(:disabled),
    html.dark .student-management select.border-gray-700:not(:disabled),
    html.dark .student-management textarea.border-gray-700:not(:disabled) {
      border-color: rgba(var(--text-rgb), 0.65);
    }

    html.dark .student-management input.border-gray-600,
    html.dark .student-management input[readonly].border-gray-700,
    html.dark .student-management input:disabled.border-gray-700,
    html.dark .student-management select:disabled.border-gray-700,
    html.dark .student-management textarea:disabled.border-gray-700 {
      border-color: rgba(var(--text-rgb), 0.3);
    }

    html.dark .bg-blue-50,
    html.dark .bg-blue-100 {
      background: rgba(var(--blue-rgb), 0.08);
      color: var(--text);
    }

    html.dark .bg-blue-500,
    html.dark .bg-blue-600,
    html.dark .bg-blue-700,
    html.dark .bg-blue-900,
    html.dark .bg-indigo-600,
    html.dark .bg-indigo-700,
    html.dark .bg-indigo-900,
    html.dark .bg-purple-600,
    html.dark .bg-purple-700,
    html.dark .bg-cyan-900,
    html.dark .bg-cyan-500,
    html.dark .bg-cyan-700 {
      background: rgba(var(--blue-rgb), 0.22);
      border-color: rgba(var(--blue-rgb), 0.5);
      color: var(--text);
    }

    html.dark .bg-green-50,
    html.dark .bg-green-100,
    html.dark .bg-emerald-50 {
      background: rgba(var(--green-rgb), 0.1);
      color: var(--text);
    }

    html.dark .bg-green-500,
    html.dark .bg-green-600,
    html.dark .bg-green-700,
    html.dark .bg-green-900 {
      background: rgba(var(--green-rgb), 0.2);
      border-color: rgba(var(--green-rgb), 0.6);
      color: var(--text);
    }

    html.dark .bg-red-50,
    html.dark .bg-red-100,
    html.dark .bg-red-400,
    html.dark .bg-orange-50,
    html.dark .bg-orange-100,
    html.dark .bg-orange-600,
    html.dark .bg-amber-50,
    html.dark .bg-yellow-50,
    html.dark .bg-yellow-100,
    html.dark .bg-amber-700,
    html.dark .bg-amber-900,
    html.dark .bg-orange-700,
    html.dark .bg-orange-800,
    html.dark .bg-yellow-500,
    html.dark .bg-yellow-600,
    html.dark .bg-yellow-800,
    html.dark .bg-red-800,
    html.dark .bg-red-900 {
      background: rgba(var(--red-rgb), 0.16);
      color: var(--text);
      border-color: rgba(var(--red-rgb), 0.4);
    }

    html.dark .bg-red-500,
    html.dark .bg-red-600,
    html.dark .bg-red-700,
    html.dark .bg-pink-600 {
      background: rgba(var(--red-rgb), 0.22);
      color: var(--text);
      border-color: rgba(var(--red-rgb), 0.55);
    }

    html.dark .text-white,
    html.dark .text-gray-900,
    html.dark .text-gray-800,
    html.dark .text-gray-700,
    html.dark .text-gray-600,
    html.dark .text-gray-500,
    html.dark .text-gray-400,
    html.dark .text-gray-300,
    html.dark .text-gray-200,
    html.dark .text-gray-100,
    html.dark .text-gray-50 {
      color: var(--text);
    }

    html.dark .text-blue-600,
    html.dark .text-blue-300,
    html.dark .text-blue-400,
    html.dark .text-blue-500,
    html.dark .text-blue-700,
    html.dark .text-blue-800,
    html.dark .text-blue-900,
    html.dark .text-indigo-600,
    html.dark .text-indigo-700,
    html.dark .text-purple-600 {
      color: var(--blue);
    }

    html.dark .text-green-500,
    html.dark .text-green-300,
    html.dark .text-green-400,
    html.dark .text-green-600,
    html.dark .text-green-700,
    html.dark .text-emerald-600 {
      color: var(--green);
    }

    html.dark .text-red-500,
    html.dark .text-red-300,
    html.dark .text-red-400,
    html.dark .text-red-600,
    html.dark .text-red-700,
    html.dark .text-red-800,
    html.dark .text-orange-600,
    html.dark .text-orange-500,
    html.dark .text-yellow-600,
    html.dark .text-yellow-800,
    html.dark .text-orange-700,
    html.dark .text-amber-800,
    html.dark .text-rose-600 {
      color: var(--red);
    }

    html.dark .border-gray-100,
    html.dark .border-gray-200,
    html.dark .border-gray-300,
    html.dark .border-gray-500,
    html.dark .border-gray-600,
    html.dark .border-gray-700,
    html.dark .border-gray-800,
    html.dark .border-gray-900 {
      border-color: var(--border);
    }

    html.dark .border-blue-500,
    html.dark .border-blue-600,
    html.dark .border-blue-700,
    html.dark .border-indigo-600,
    html.dark .border-indigo-700 {
      border-color: rgba(var(--blue-rgb), 0.6);
    }

    html.dark .border-red-500,
    html.dark .border-red-600,
    html.dark .border-red-700,
    html.dark .border-orange-700 {
      border-color: rgba(var(--red-rgb), 0.6);
    }

    html.dark .bg-gradient-to-r {
      background: linear-gradient(90deg, rgba(var(--bg-row-rgb), 0.92), rgba(var(--bg-panel-rgb), 0.92));
    }

    html.dark .bg-gradient-to-br,
    html.dark .bg-gradient-to-b {
      background: linear-gradient(135deg, rgba(var(--bg-row-rgb), 0.9), rgba(var(--bg-panel-rgb), 0.9));
    }

    html.dark .bg-opacity-50,
    html.dark .bg-opacity-20 {
      opacity: 0.8;
    }

    /* Fallback attribute-based overrides to keep every utility on-theme */
    html.dark [class*="bg-blue-"],
    html.dark [class*="bg-indigo-"],
    html.dark [class*="bg-purple-"],
    html.dark [class*="bg-cyan-"] {
      background: rgba(var(--blue-rgb), 0.2);
      color: var(--text);
      border-color: rgba(var(--blue-rgb), 0.45);
    }

    html.dark [class*="bg-green-"],
    html.dark [class*="bg-emerald-"] {
      background: rgba(var(--green-rgb), 0.18);
      color: var(--text);
      border-color: rgba(var(--green-rgb), 0.5);
    }

    html.dark [class*="bg-red-"],
    html.dark [class*="bg-orange-"],
    html.dark [class*="bg-amber-"],
    html.dark [class*="bg-yellow-"],
    html.dark [class*="bg-rose-"] {
      background: rgba(var(--red-rgb), 0.18);
      color: var(--text);
      border-color: rgba(var(--red-rgb), 0.45);
    }

    html.dark [class*="text-gray-"] {
      color: var(--text);
    }

    html.dark [class*="text-blue-"],
    html.dark [class*="text-indigo-"],
    html.dark [class*="text-purple-"],
    html.dark [class*="text-cyan-"] {
      color: var(--blue);
    }

    html.dark [class*="text-green-"],
    html.dark [class*="text-emerald-"] {
      color: var(--green);
    }

    html.dark [class*="text-red-"],
    html.dark [class*="text-orange-"],
    html.dark [class*="text-amber-"],
    html.dark [class*="text-yellow-"],
    html.dark [class*="text-rose-"] {
      color: var(--red);
    }

    html.dark [class*="border-blue-"],
    html.dark [class*="border-indigo-"],
    html.dark [class*="border-purple-"],
    html.dark [class*="border-cyan-"] {
      border-color: rgba(var(--blue-rgb), 0.55);
    }

    html.dark [class*="border-green-"],
    html.dark [class*="border-emerald-"] {
      border-color: rgba(var(--green-rgb), 0.55);
    }

    html.dark [class*="border-red-"],
    html.dark [class*="border-orange-"],
    html.dark [class*="border-amber-"],
    html.dark [class*="border-yellow-"],
    html.dark [class*="border-rose-"] {
      border-color: rgba(var(--red-rgb), 0.55);
    }

    html.dark .shadow-xl,
    html.dark .shadow-2xl,
    html.dark [class*="shadow-indigo-"] {
      box-shadow: var(--shadow-strong);
    }