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

    :root {
      --primary: #3a41b0;
      --primary-light: #4f58d4;
      --accent: #6c5ce7;
      --bg-light: #f5f7fc;
      --bg-dark: #0f0f1a;
      --sidebar-light: rgba(255, 255, 255, 0.85);
      --sidebar-dark: rgba(22, 25, 37, 0.95);
      --text-light: #1e1e2f;
      --text-dark: #e8eaff;
      --border-light: #cbd0e6;
      --border-dark: #2f3349;
      --card-light: white;
      --card-dark: #1e2338;
      --hover-light: #f0f2fe;
      --hover-dark: #2a3150;
      --active-light: #e6eaff;
      --active-dark: #3f4a7a;
      --gradient: linear-gradient(135deg, #3b3f8c, #9b6dff);
      --shadow: 0 8px 32px rgba(0,0,0,0.08);
      --radius: 20px;
      --radius-sm: 12px;
      --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    body {
      font-family: "Inter", "Noto Sans", system-ui, -apple-system, sans-serif;
      background: var(--bg-light);
      height: 100vh;
      display: flex;
      transition: background var(--transition), color var(--transition);
      color: var(--text-light);
      overflow: hidden;
      position: relative;
    }

    body.dark {
      background: var(--bg-dark);
      color: var(--text-dark);
    }
    body.dark .sidebar {
      background: var(--sidebar-dark);
      border-right-color: var(--border-dark);
    }
    body.dark .editor-container {
      background: #181c2c;
    }
    body.dark .ql-toolbar.ql-snow,
    body.dark .ql-container.ql-snow {
      border-color: #2e3440;
      background: rgba(24, 28, 44, 0.9);
    }
    body.dark .ql-editor {
      color: #e2e6ff;
    }
    body.dark .note-item {
      background: var(--card-dark);
    }
    body.dark .note-item:hover {
      background: var(--hover-dark);
    }
    body.dark .note-item.active {
      background: var(--active-dark);
      border-left-color: #a9b7ff;
    }
    body.dark input, body.dark select, body.dark .category-input {
      background: #262d44;
      border-color: #414b6e;
      color: #f0f3ff;
    }
    body.dark .storage-bar-bg {
      background: #292f4c;
    }
    body.dark .action-btn {
      background: #2a2f46;
      color: #c8cef0;
    }
    body.dark .mic-btn {
      box-shadow: 0 6px 20px rgba(79,70,229,0.5);
    }
    body.dark .modal-content {
      background: #1e2338;
      color: #e8eaff;
    }
    body.dark .pdf-preview-content {
      background: #262d44;
    }
    body.dark .feature-panel {
      background: #1e2338;
      border-color: #2f3349;
    }
    body.dark .language-dropdown,
    body.dark .font-dropdown {
      background: #1e2338;
      border-color: #2f3349;
    }
    body.dark .language-option:hover,
    body.dark .font-option:hover {
      background: #2a3150;
    }

    /* Mobile Menu Toggle */
    .menu-toggle {
      display: none;
      position: absolute;
      top: 16px;
      left: 16px;
      z-index: 120;
      background: var(--primary);
      backdrop-filter: blur(12px);
      border: none;
      color: white;
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      font-size: 1.4rem;
      cursor: pointer;
      box-shadow: 0 8px 20px rgba(58,65,176,0.3);
      align-items: center;
      justify-content: center;
      transition: var(--transition);
    }
    .menu-toggle:hover {
      background: var(--primary-light);
      transform: scale(1.05);
    }

    /* SIDEBAR */
    .sidebar {
      width: 350px;
      min-width: 350px;
      background: var(--sidebar-light);
      backdrop-filter: blur(28px);
      border-right: 1px solid rgba(0,0,0,0.06);
      display: flex;
      flex-direction: column;
      padding: 20px 16px;
      box-shadow: var(--shadow);
      transition: transform 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
      z-index: 110;
      height: 100vh;
      overflow-y: auto;
    }

    .app-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 20px;
    }
    .app-header h2 {
      font-weight: 700;
      font-size: 1.9rem;
      letter-spacing: -0.03em;
      background: var(--gradient);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .header-actions {
      display: flex;
      gap: 6px;
    }
    .icon-circle-btn {
      background: rgba(128,140,200,0.12);
      border: none;
      font-size: 1.1rem;
      cursor: pointer;
      color: #5b5f8c;
      width: 38px;
      height: 38px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
    }
    .icon-circle-btn:hover {
      background: rgba(128,140,200,0.28);
      transform: rotate(15deg);
    }

    .btn-primary {
      background: var(--primary);
      color: white;
      border: none;
      padding: 13px 20px;
      border-radius: 24px;
      font-weight: 600;
      font-size: 0.95rem;
      cursor: pointer;
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      box-shadow: 0 8px 20px rgba(58, 65, 176, 0.25);
      transition: all 0.25s;
      margin-bottom: 16px;
      letter-spacing: -0.2px;
    }
    .btn-primary:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
      box-shadow: 0 14px 28px rgba(58, 65, 176, 0.35);
    }

    .search-section {
      margin-bottom: 12px;
    }
    .search-wrapper {
      display: flex;
      background: rgba(0,0,0,0.03);
      border-radius: 40px;
      padding: 3px 3px 3px 16px;
      align-items: center;
      border: 1px solid rgba(128,128,160,0.18);
      transition: var(--transition);
    }
    .search-wrapper:focus-within {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(58,65,176,0.1);
    }
    .search-wrapper i {
      color: #7a7fa3;
      font-size: 0.85rem;
    }
    .search-wrapper input {
      border: none;
      background: transparent;
      padding: 11px 8px;
      font-size: 0.9rem;
      width: 100%;
      outline: none;
      font-weight: 450;
    }

    .filter-row {
      display: flex;
      gap: 8px;
      margin: 8px 0 14px;
    }
    select {
      flex: 1;
      padding: 11px 12px;
      border-radius: 20px;
      border: 1px solid rgba(128,128,160,0.22);
      background: rgba(255,255,255,0.65);
      font-size: 0.85rem;
      outline: none;
      font-weight: 500;
      cursor: pointer;
      transition: var(--transition);
    }
    select:focus {
      border-color: var(--primary);
    }

    .notes-list {
      flex: 1;
      overflow-y: auto;
      margin-top: 4px;
      padding-right: 4px;
    }
    .notes-list::-webkit-scrollbar {
      width: 5px;
    }
    .notes-list::-webkit-scrollbar-thumb {
      background: rgba(128,140,200,0.3);
      border-radius: 10px;
    }

    .note-item {
      background: var(--card-light);
      padding: 14px 16px;
      margin-bottom: 8px;
      border-radius: 18px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.03);
      cursor: pointer;
      transition: all 0.2s ease;
      border: 1px solid transparent;
      position: relative;
      overflow: hidden;
    }
    .note-item::before {
      content: '';
      position: absolute;
      left: 0;
      top: 0;
      bottom: 0;
      width: 4px;
      background: var(--gradient);
      border-radius: 0 4px 4px 0;
      opacity: 0;
      transition: opacity 0.2s;
    }
    .note-item:hover {
      background: var(--hover-light);
      border-color: #b6befa;
      transform: translateX(3px);
    }
    .note-item.active {
      background: var(--active-light);
      border-left: 4px solid var(--primary);
      box-shadow: 0 8px 20px rgba(58,65,176,0.12);
    }
    .note-item.active::before {
      opacity: 1;
    }
    .note-title {
      font-weight: 650;
      margin-bottom: 4px;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      font-size: 0.95rem;
    }
    .note-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.7rem;
      color: #6b6f8f;
      gap: 8px;
    }
    .note-preview {
      flex: 1;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .category-badge {
      background: #d9dfff;
      padding: 2px 10px;
      border-radius: 30px;
      font-size: 0.65rem;
      font-weight: 600;
      letter-spacing: 0.2px;
      white-space: nowrap;
    }
    .note-date {
      font-size: 0.65rem;
      opacity: 0.6;
      white-space: nowrap;
    }

    .storage-panel {
      margin-top: 16px;
      padding-top: 14px;
      border-top: 1px dashed #b5bad3;
    }
    .storage-info {
      display: flex;
      justify-content: space-between;
      font-size: 0.75rem;
      margin-bottom: 6px;
      font-weight: 500;
    }
    .storage-bar-bg {
      height: 8px;
      background: #dfe3f2;
      border-radius: 20px;
      overflow: hidden;
      margin-bottom: 12px;
    }
    .storage-bar-fill {
      height: 100%;
      width: 0%;
      background: linear-gradient(90deg, #4f46e5, #a78bfa);
      border-radius: 20px;
      transition: width 0.5s ease;
    }
    .extra-actions {
      display: flex;
      gap: 6px;
      margin-top: 10px;
      flex-wrap: wrap;
    }
    .icon-btn {
      background: rgba(128,140,200,0.1);
      border: none;
      padding: 8px 14px;
      border-radius: 30px;
      font-size: 0.75rem;
      font-weight: 550;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 5px;
      transition: var(--transition);
      white-space: nowrap;
    }
    .icon-btn:hover {
      background: rgba(128,140,200,0.25);
      transform: translateY(-1px);
    }

    /* Export dropdown */
    .export-dropdown {
      position: relative;
    }
    .export-options {
      display: none;
      position: absolute;
      bottom: 100%;
      left: 0;
      background: white;
      border-radius: 16px;
      box-shadow: 0 10px 40px rgba(0,0,0,0.2);
      z-index: 200;
      min-width: 200px;
      overflow: hidden;
      margin-bottom: 6px;
      border: 1px solid rgba(0,0,0,0.08);
    }
    body.dark .export-options {
      background: #1e2338;
      border-color: #2f3349;
    }
    .export-options.show {
      display: block;
    }
    .export-option-btn {
      display: flex;
      align-items: center;
      gap: 10px;
      width: 100%;
      padding: 12px 16px;
      border: none;
      background: white;
      cursor: pointer;
      font-size: 0.85rem;
      font-weight: 500;
      transition: 0.15s;
      color: #1e1e2f;
      border-bottom: 1px solid rgba(0,0,0,0.05);
    }
    body.dark .export-option-btn {
      background: #1e2338;
      color: #e0e4ff;
      border-bottom-color: #2f3349;
    }
    .export-option-btn:hover {
      background: #f0f2fe;
    }
    body.dark .export-option-btn:hover {
      background: #2a3150;
    }

    /* MAIN EDITOR */
    .editor-container {
      flex: 1;
      padding: 20px 28px;
      overflow-y: auto;
      background: rgba(255,255,255,0.75);
      backdrop-filter: blur(16px);
      display: flex;
      flex-direction: column;
    }
    .editor-toolbar-top {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 10px;
      margin-bottom: 16px;
    }
    .note-header {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px;
      flex: 1;
      min-width: 280px;
    }
    .title-input {
      flex: 2;
      min-width: 200px;
      font-size: 1.8rem;
      font-weight: 700;
      border: none;
      background: transparent;
      outline: none;
      padding: 6px 0;
      border-bottom: 2px solid transparent;
      transition: var(--transition);
      letter-spacing: -0.4px;
    }
    .title-input:focus {
      border-bottom-color: #6d76d9;
    }
    .category-input {
      flex: 1;
      min-width: 130px;
      padding: 10px 14px;
      border-radius: 30px;
      border: 1px solid var(--border-light);
      background: rgba(255,255,255,0.6);
      font-weight: 500;
      font-size: 0.85rem;
    }
    .editor-actions {
      display: flex;
      gap: 6px;
    }
    .action-btn {
      background: white;
      border: none;
      width: 40px;
      height: 40px;
      border-radius: var(--radius-sm);
      font-size: 1rem;
      cursor: pointer;
      box-shadow: 0 4px 10px rgba(0,0,0,0.04);
      transition: var(--transition);
      color: #3f4570;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .action-btn:hover {
      background: #eaeefd;
      transform: scale(1.08);
    }
    .action-btn.danger:hover {
      background: #ffe0e0;
      color: #e74c3c;
    }

    /* Feature Panels */
    .features-row {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 12px;
    }
    .feature-panel {
      background: white;
      border: 1px solid #e8eaf6;
      border-radius: var(--radius-sm);
      padding: 10px 14px;
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.8rem;
      font-weight: 500;
      cursor: pointer;
      transition: var(--transition);
      position: relative;
      backdrop-filter: blur(4px);
    }
    .feature-panel:hover {
      background: #f5f6ff;
      border-color: #b6befa;
    }
    .feature-panel i {
      font-size: 1rem;
      color: var(--primary);
    }
    .feature-panel select {
      border: none;
      background: transparent;
      font-size: 0.8rem;
      font-weight: 500;
      cursor: pointer;
      outline: none;
      padding: 2px;
      font-family: inherit;
    }
    body.dark .feature-panel {
      background: #1e2338;
      border-color: #2f3349;
    }
    body.dark .feature-panel:hover {
      background: #262d44;
    }

    /* Language & Font Dropdowns */
    .language-dropdown,
    .font-dropdown {
      display: none;
      position: absolute;
      top: 100%;
      left: 0;
      background: white;
      border: 1px solid #e0e0f0;
      border-radius: 12px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.15);
      z-index: 50;
      max-height: 250px;
      overflow-y: auto;
      min-width: 200px;
      margin-top: 4px;
    }
    .language-dropdown.show,
    .font-dropdown.show {
      display: block;
    }
    .language-option,
    .font-option {
      padding: 10px 14px;
      cursor: pointer;
      font-size: 0.85rem;
      transition: 0.15s;
      border-bottom: 1px solid rgba(0,0,0,0.04);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .language-option:hover,
    .font-option:hover {
      background: #f0f2fe;
    }
    .language-option.selected,
    .font-option.selected {
      background: #e6eaff;
      font-weight: 600;
    }
    body.dark .language-dropdown,
    body.dark .font-dropdown {
      background: #1e2338;
      border-color: #2f3349;
    }
    body.dark .language-option,
    body.dark .font-option {
      border-bottom-color: #2f3349;
    }
    body.dark .language-option:hover,
    body.dark .font-option:hover {
      background: #2a3150;
    }

    .ql-toolbar.ql-snow {
      border-radius: 16px 16px 0 0;
      background: rgba(250,251,255,0.85);
      border: 1px solid #d9ddf0;
      flex-wrap: wrap;
    }
    .ql-container.ql-snow {
      border-radius: 0 0 16px 16px;
      min-height: 350px;
      font-size: 1rem;
      background: rgba(255,255,255,0.75);
      border: 1px solid #d9ddf0;
      flex: 1;
    }
    .editor-footer {
      margin-top: 16px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
    }
    .word-count {
      font-size: 0.75rem;
      opacity: 0.7;
      font-weight: 500;
    }
    .mic-btn {
      background: var(--accent);
      color: white;
      border: none;
      padding: 10px 20px;
      border-radius: 30px;
      font-weight: 600;
      gap: 7px;
      display: flex;
      align-items: center;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 6px 16px rgba(108,92,231,0.3);
      font-size: 0.85rem;
    }
    .mic-btn:hover {
      background: #7d6ff0;
      transform: scale(1.03);
    }
    .mic-btn.recording {
      background: #e74c3c;
      animation: pulse 1.2s infinite;
    }
    @keyframes pulse {
      0%, 100% { box-shadow: 0 0 0 0 rgba(231,76,60,0.5); }
      50% { box-shadow: 0 0 0 15px rgba(231,76,60,0); }
    }
    .mic-status {
      font-size: 0.7rem;
      opacity: 0.8;
      margin-left: 4px;
    }

    .status-saved {
      color: #2fa36b;
      font-size: 0.75rem;
      font-weight: 500;
    }
    .status-unsaved {
      color: #e67e22;
    }

    /* MODALS */
    .modal-overlay {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.55);
      z-index: 300;
      align-items: center;
      justify-content: center;
      backdrop-filter: blur(4px);
    }
    .modal-overlay.show {
      display: flex;
    }
    .modal-content {
      background: white;
      border-radius: 20px;
      padding: 24px;
      max-width: 650px;
      width: 92%;
      max-height: 80vh;
      overflow-y: auto;
      box-shadow: 0 20px 50px rgba(0,0,0,0.3);
    }
    .modal-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
    }
    .modal-header h3 {
      font-weight: 700;
      font-size: 1.3rem;
    }
    .close-modal {
      background: none;
      border: none;
      font-size: 1.4rem;
      cursor: pointer;
      color: inherit;
      padding: 4px 8px;
      border-radius: 8px;
      transition: 0.2s;
    }
    .close-modal:hover {
      background: rgba(0,0,0,0.08);
    }
    .pdf-preview-content {
      background: #fafafa;
      padding: 16px;
      border-radius: 14px;
      margin-bottom: 16px;
      font-size: 0.9rem;
      line-height: 1.6;
      max-height: 300px;
      overflow-y: auto;
    }
    .download-pdf-btn {
      background: #e74c3c;
      color: white;
      border: none;
      padding: 12px 24px;
      border-radius: 25px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 8px;
      margin: 0 auto;
      transition: 0.2s;
    }
    .download-pdf-btn:hover {
      background: #c0392b;
      transform: scale(1.03);
    }
    .download-pdf-btn:disabled {
      opacity: 0.6;
      cursor: not-allowed;
    }

    /* Stats Modal */
    .stats-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    .stat-card {
      background: #f8f9ff;
      padding: 16px;
      border-radius: 14px;
      text-align: center;
    }
    body.dark .stat-card {
      background: #262d44;
    }
    .stat-value {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary);
    }
    .stat-label {
      font-size: 0.75rem;
      opacity: 0.7;
      margin-top: 4px;
    }

    /* RESPONSIVE */
    @media screen and (max-width: 900px) {
      .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        width: 310px;
        transform: translateX(-110%);
        box-shadow: 10px 0 40px rgba(0,0,0,0.25);
        z-index: 115;
        padding-top: 75px;
      }
      .sidebar.open {
        transform: translateX(0);
      }
      .menu-toggle {
        display: flex;
      }
      .editor-container {
        padding: 14px 16px;
        padding-top: 65px;
      }
      .note-header {
        flex-direction: column;
        align-items: stretch;
      }
      .editor-actions {
        justify-content: flex-end;
      }
      .features-row {
        gap: 6px;
      }
      .feature-panel {
        font-size: 0.7rem;
        padding: 8px 10px;
      }
    }

    @media screen and (max-width: 500px) {
      .title-input {
        font-size: 1.4rem;
      }
      .features-row {
        flex-direction: column;
      }
      .stats-grid {
        grid-template-columns: 1fr;
      }
    }

    .overlay {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.45);
      z-index: 105;
      backdrop-filter: blur(2px);
    }
    .overlay.show {
      display: block;
    }

    .spinner {
      display: inline-block;
      width: 18px;
      height: 18px;
      border: 3px solid rgba(255,255,255,0.3);
      border-radius: 50%;
      border-top-color: white;
      animation: spin 0.8s linear infinite;
    }
    @keyframes spin {
      to { transform: rotate(360deg); }
    }

    /* Toast notification */
    .toast {
      position: fixed;
      bottom: 24px;
      right: 24px;
      background: #333;
      color: white;
      padding: 12px 20px;
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 500;
      z-index: 400;
      box-shadow: 0 10px 30px rgba(0,0,0,0.3);
      animation: slideUp 0.3s ease;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    @keyframes slideUp {
      from { transform: translateY(20px); opacity: 0; }
      to { transform: translateY(0); opacity: 1; }
    }
    .toast.success {
      background: #2fa36b;
    }
    .toast.info {
      background: #3a41b0;
    }