:root {
      --bg-color: #f5f5f5;
      --text-color: #333;
      --canvas-border: #000;
      --canvas-bg: white;
      --toggle-bg: #ddd;
      --toggle-slider: #fff;
      --input-bg: #fff;
      --input-border: #ccc;
      --button-bg: #4CAF50;
      --button-hover: #45a049;
      --button-text: white;
    }

    .dark-mode {
      --bg-color: #222;
      --text-color: #f5f5f5;
      --canvas-border: #555;
      --canvas-bg: #333;
      --toggle-bg: #555;
      --toggle-slider: #ddd;
      --input-bg: #333;
      --input-border: #555;
      --button-bg: #2d662f;
      --button-hover: #3a7f3c;
      --button-text: #f5f5f5;
    }

    body {
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      min-height: 100vh;
      margin: 0;
      padding: 15px;
      background-color: var(--bg-color);
      color: var(--text-color);
      transition: background-color 0.3s, color 0.3s;
      font-family: Arial, sans-serif;
      box-sizing: border-box;
    }

    *, *:before, *:after {
      box-sizing: inherit;
    }

    .container {
      position: relative;
      width: 100%;
      max-width: 500px;
    }

    .app-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      margin-bottom: 15px;
    }

    .header-controls {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .toggle-controls-btn {
      display: flex;
      align-items: center;
      gap: 5px;
      padding: 6px 12px;
      background-color: var(--button-bg);
      color: var(--button-text);
      border: none;
      border-radius: 4px;
      cursor: pointer;
      font-size: 14px;
      transition: background-color 0.3s;
    }

    .toggle-controls-btn:hover {
      background-color: var(--button-hover);
    }

    .toggle-icon {
      font-size: 16px;
    }

    .controls-container {
      width: 100%;
      overflow: visible;
    }

    .controls-container .text-inputs {
      max-height: 1000px;
      overflow: hidden;
      transition: max-height 0.5s ease-in-out;
    }

    .controls-container.hidden .text-inputs {
      max-height: 0;
    }

    .controls-header {
      display: flex;
      justify-content: flex-start;
      margin-bottom: 15px;
    }

    .essential-controls {
      width: 100%;
      margin: 15px 0;
      padding-bottom: 15px;
      border-bottom: 1px solid var(--input-border);
    }

    .version-info {
      font-size: 11px;
      color: var(--text-color);
      opacity: 0.6;
      font-weight: 500;
    }

    canvas {
      border: 1px solid var(--canvas-border);
      background-color: var(--canvas-bg);
      transition: border 0.3s, background-color 0.3s;
      width: 100%;
      height: auto;
      display: block;
    }

    /* Toggle Switch Styles */
    .theme-toggle {
      position: relative;
      display: flex;
      align-items: center;
    }

    .theme-toggle label {
      margin-right: 10px;
      font-size: 14px;
    }

    .switch {
      position: relative;
      display: inline-block;
      width: 50px;
      height: 24px;
    }

    .switch input {
      opacity: 0;
      width: 0;
      height: 0;
    }

    .slider {
      position: absolute;
      cursor: pointer;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-color: var(--toggle-bg);
      transition: .4s;
      border-radius: 24px;
    }

    .slider:before {
      position: absolute;
      content: "";
      height: 16px;
      width: 16px;
      left: 4px;
      bottom: 4px;
      background-color: var(--toggle-slider);
      transition: .4s;
      border-radius: 50%;
    }

    input:checked + .slider {
      background-color: #2196F3;
    }

    input:checked + .slider:before {
      transform: translateX(26px);
    }

    .mode-icon {
      margin: 0 5px;
      font-size: 14px;
    }

    /* Text Input Styles */
    .text-inputs {
      width: 100%;
      margin-top: 20px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .input-group {
      display: flex;
      flex-direction: column;
      width: 100%;
      margin-bottom: 20px;
    }

    .input-group label {
      margin-bottom: 5px;
      font-weight: bold;
    }

    .input-group input {
      padding: 10px;
      border: 1px solid var(--input-border);
      border-radius: 4px;
      background-color: var(--input-bg);
      color: var(--text-color);
      font-size: 16px;
      transition: border 0.3s, background-color 0.3s, color 0.3s;
    }

    .input-group input:focus {
      outline: none;
      border-color: #2196F3;
    }

    /* File Upload Styles */
    .upload-container {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
    }

    .file-input {
      position: absolute;
      width: 0.1px;
      height: 0.1px;
      opacity: 0;
      overflow: hidden;
      z-index: -1;
    }

    .upload-btn {
      padding: 8px 16px;
      background-color: var(--button-bg);
      color: var(--button-text);
      border: none;
      border-radius: 4px;
      cursor: pointer;
      font-size: 14px;
      transition: background-color 0.3s;
      white-space: nowrap;
    }

    .upload-btn:hover {
      background-color: var(--button-hover);
    }

    .file-name {
      font-size: 14px;
      color: var(--text-color);
      opacity: 0.8;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      max-width: 200px;
    }

    .upload-status {
      margin-top: 8px;
      width: 100%;
    }

    .progress-bar {
      height: 6px;
      background-color: var(--input-border);
      border-radius: 3px;
      overflow: hidden;
      margin-bottom: 8px;
    }

    .progress-fill {
      height: 100%;
      background-color: var(--button-bg);
      width: 0%;
      transition: width 0.3s ease;
    }

    .error-message {
      color: #f44336;
      font-size: 14px;
      margin-top: 5px;
      min-height: 20px;
    }

    .controls {
      display: flex;
      justify-content: space-between;
      width: 100%;
      margin-top: 15px;
    }

    .text-options {
      display: flex;
      gap: 10px;
      align-items: center;
      width: 100%;
      flex-wrap: wrap;
    }

    .text-options label {
      margin-right: 5px;
    }

    .text-options select {
      padding: 8px;
      background-color: var(--input-bg);
      color: var(--text-color);
      border: 1px solid var(--input-border);
      border-radius: 4px;
      font-size: 14px;
    }

    .button-row {
      display: flex;
      justify-content: center;
      gap: 10px;
      width: 100%;
      margin-top: 15px;
      flex-wrap: wrap;
    }

    .update-btn, .preview-btn, .save-btn {
      padding: 12px 20px;
      background-color: var(--button-bg);
      color: var(--button-text);
      border: none;
      border-radius: 4px;
      cursor: pointer;
      font-size: 16px;
      transition: background-color 0.3s;
      flex: 1;
      min-width: 120px;
      max-width: 200px;
    }

    .update-btn:hover, .save-btn:hover {
      background-color: var(--button-hover);
    }

    .preview-btn {
      background-color: #4a90e2;
    }

    .preview-btn:hover {
      background-color: #357abd;
    }

    .save-btn {
      background-color: #e67e22;
    }

    .save-btn:hover {
      background-color: #d35400;
    }

    .canvas-container {
      position: relative;
      cursor: default;
      width: 100%;
      height: auto;
    }

    .canvas-container.dragging-text {
      cursor: move;
    }

    .instructions {
      margin-top: 5px;
      font-size: 12px;
      color: var(--text-color);
      opacity: 0.8;
      text-align: center;
    }

    .drag-toggle {
      display: flex;
      align-items: center;
      margin-top: 10px;
      font-size: 14px;
    }

    .drag-toggle input[type="checkbox"] {
      margin-right: 8px;
      width: 16px;
      height: 16px;
      cursor: pointer;
    }

    .drag-toggle label {
      cursor: pointer;
      user-select: none;
    }

    .bounding-box-toggle {
      display: flex;
      align-items: center;
      margin-top: 10px;
      font-size: 14px;
      flex-wrap: nowrap;
      gap: 8px;
      width: 100%;
    }

    .bounding-box-toggle input[type="checkbox"] {
      margin-right: 0;
      width: 16px;
      height: 16px;
      cursor: pointer;
      flex-shrink: 0;
    }

    .bounding-box-toggle label {
      cursor: pointer;
      user-select: none;
      margin-right: 0;
      white-space: nowrap;
    }

    .bounding-box-toggle select {
      padding: 6px;
      background-color: var(--input-bg);
      color: var(--text-color);
      border: 1px solid var(--input-border);
      border-radius: 4px;
      font-size: 14px;
      min-width: 120px;
      flex-shrink: 0;
    }

    .canvas-container.drawing-box {
      cursor: crosshair;
    }

    .instructions-box {
      margin-top: 5px;
      font-size: 12px;
      color: var(--text-color);
      opacity: 0.8;
      text-align: center;
      padding: 5px;
      background-color: rgba(0, 0, 0, 0.05);
      border-radius: 4px;
    }

    .text-position-controls {
      display: flex;
      gap: 10px;
      margin-top: 10px;
      flex-wrap: wrap;
      justify-content: center;
    }

    .position-btn {
      padding: 8px 12px;
      font-size: 14px;
      background-color: var(--button-bg);
      color: var(--button-text);
      border: none;
      border-radius: 4px;
      cursor: pointer;
      flex: 1;
      min-width: 120px;
      max-width: 150px;
    }

    .position-btn:hover {
      background-color: var(--button-hover);
    }

    /* Modal Styles */
    .modal {
      display: none;
      position: fixed;
      z-index: 1000;
      left: 0;
      top: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0, 0, 0, 0.7);
      overflow: auto;
    }

    .modal-content {
      background-color: var(--bg-color);
      margin: 5% auto;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
      max-width: 600px;
      width: 90%;
      position: relative;
    }

    .close-modal {
      position: absolute;
      right: 20px;
      top: 10px;
      font-size: 28px;
      font-weight: bold;
      cursor: pointer;
      color: var(--text-color);
    }

    .close-modal:hover {
      color: #f44336;
    }

    .modal h3 {
      margin-top: 0;
      text-align: center;
      color: var(--text-color);
    }

    .modal canvas {
      max-width: 100%;
      height: auto;
      display: block;
      margin: 0 auto;
      border: 1px solid var(--canvas-border);
    }

    .modal-actions {
      display: flex;
      justify-content: center;
      margin-top: 20px;
      gap: 10px;
    }

    /* Mobile Responsive Styles */
    @media (max-width: 600px) {
      body {
        padding: 10px;
      }
      
      .app-header {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
      }
      
      .version-info {
        margin-bottom: 0;
      }
      
      .theme-toggle {
        position: relative;
        top: 0;
        right: 0;
      }
      
      .text-options {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
      }
      
      .text-options label {
        margin-right: 0;
        margin-bottom: 5px;
        display: block;
      }
      
      .text-options select {
        width: 100%;
        padding: 10px;
      }
      
      .position-btn {
        flex: 1 0 calc(50% - 10px);
        max-width: none;
      }
      
      .button-row {
        flex-direction: column;
      }
      
      .update-btn, .preview-btn, .save-btn {
        max-width: none;
        width: 100%;
      }
      
      .modal-content {
        width: 95%;
        margin: 10% auto;
      }
    }

    /* Tablet Responsive Styles */
    @media (min-width: 601px) and (max-width: 900px) {
      .text-options {
        flex-wrap: wrap;
      }
      
      .text-options > * {
        flex: 1 0 calc(50% - 10px);
      }
      
      .position-btn {
        flex: 1 0 calc(33.33% - 10px);
      }
    }