:root {
    --bg-color: #0d0e12;
    --card-bg: #16181f;
    --accent-color: #ff6b00;
    --text-main: #f0f0f0;
    --text-muted: #8a8f9d;
  }
  
  body {
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: system-ui, -apple-system, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
  }
  
  .container {
    width: 90%;
    max-width: 680px;
    display: flex;
    flex-direction: column;
    gap: 24px;
  }
  
  header h1 {
    margin: 0;
    color: var(--accent-color);
  }
  
  header p {
    margin: 4px 0 0;
    color: var(--text-muted);
  }
  
  .reader-box {
    height: 180px;
    background-color: var(--card-bg);
    border: 1px solid #2a2d38;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .word-display {
    font-size: 3rem;
    letter-spacing: 1px;
  }
  
  .bionic-highlight {
    color: var(--accent-color);
    font-weight: 800;
  }
  
  .controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--card-bg);
    padding: 16px;
    border-radius: 8px;
  }
  
  .slider-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }
  
  .btn-group {
    display: flex;
    gap: 8px;
  }
  
  button {
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
  }
  
  button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
  }
  
  textarea {
    width: 100%;
    height: 150px;
    background-color: var(--card-bg);
    border: 1px solid #2a2d38;
    color: var(--text-main);
    border-radius: 8px;
    padding: 12px;
    font-size: 1rem;
    box-sizing: border-box;
  }
  .progress-container {
    width: 100%;
    height: 6px;
    background-color: #2a2d38;
    border-radius: 3px;
    overflow: hidden;
    margin-top: 16px;
  }
  
  .progress-bar {
    height: 100%;
    width: 0%;
    background-color: var(--accent-color);
    transition: width 0.1s linear;
  }
  
  .stats-bar {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 8px;
  }
  
  .stats-bar strong {
    color: var(--text-main);
  }

  .file-upload-box {
    border: 2px dashed #2a2d38;
    border-radius: 8px;
    padding: 16px;
    text-align: center;
    background-color: var(--card-bg);
    cursor: pointer;
    margin-bottom: 12px;
    transition: border-color 0.2s ease, background-color 0.2s ease;
  }
  
  .file-upload-box:hover,
  .file-upload-box.drag-over {
    border-color: var(--accent-color);
    background-color: #1f222d;
  }
  
  .file-label {
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.95rem;
  }
  
  .file-label strong {
    color: var(--accent-color);
  }

  :root {
    --bg-color: #0d0e12;
    --card-bg: #16181f;
    --accent-color: #ff6b00;
    --text-main: #f0f0f0;
    --text-muted: #8a8f9d;
  }
  
  body {
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: system-ui, -apple-system, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
  }
  
  .container {
    width: 90%;
    max-width: 680px;
    display: flex;
    flex-direction: column;
    gap: 24px;
  }
  
  header h1 {
    margin: 0;
    color: var(--accent-color);
  }
  
  header p {
    margin: 4px 0 0;
    color: var(--text-muted);
  }
  
  .reader-box {
    background-color: var(--card-bg);
    border: 1px solid #2a2d38;
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 180px;
  }
  
  .word-display {
    font-size: 3rem;
    letter-spacing: 1px;
    text-align: center;
    margin-bottom: 16px;
  }
  
  .bionic-highlight {
    color: var(--accent-color);
    font-weight: 800;
  }
  
  .placeholder {
    font-size: 1.2rem;
    color: var(--text-muted);
  }
  
  .progress-container {
    width: 100%;
    height: 6px;
    background-color: #2a2d38;
    border-radius: 3px;
    overflow: hidden;
  }
  
  .progress-bar {
    height: 100%;
    width: 0%;
    background-color: var(--accent-color);
    transition: width 0.1s linear;
  }
  
  .stats-bar {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 8px;
  }
  
  .stats-bar strong {
    color: var(--text-main);
  }
  
  .controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--card-bg);
    padding: 16px;
    border-radius: 8px;
    border: 1px solid #2a2d38;
  }
  
  .slider-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }
  
  .btn-group {
    display: flex;
    gap: 8px;
  }
  
  button {
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
  }
  
  button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
  }
  
  .file-upload-box {
    border: 2px dashed #2a2d38;
    border-radius: 8px;
    padding: 16px;
    text-align: center;
    background-color: var(--card-bg);
    cursor: pointer;
    margin-bottom: 12px;
    transition: border-color 0.2s ease, background-color 0.2s ease;
  }
  
  .file-upload-box:hover,
  .file-upload-box.drag-over {
    border-color: var(--accent-color);
    background-color: #1f222d;
  }
  
  .file-label {
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.95rem;
  }
  
  .file-label strong {
    color: var(--accent-color);
  }
  
  textarea {
    width: 100%;
    height: 150px;
    background-color: var(--card-bg);
    border: 1px solid #2a2d38;
    color: var(--text-main);
    border-radius: 8px;
    padding: 12px;
    font-size: 1rem;
    box-sizing: border-box;
  }

  :root {
    --bg-color: #0d0e12;
    --card-bg: #16181f;
    --accent-color: #ff6b00;
    --text-main: #f0f0f0;
    --text-muted: #8a8f9d;
  }
  
  body {
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: system-ui, -apple-system, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
  }
  
  .container {
    width: 90%;
    max-width: 680px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px 0;
  }
  
  header h1 {
    margin: 0;
    color: var(--accent-color);
  }
  
  header p {
    margin: 4px 0 0;
    color: var(--text-muted);
  }
  
  .reader-box {
    background-color: var(--card-bg);
    border: 1px solid #2a2d38;
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 180px;
  }
  
  .word-display {
    font-size: 3rem;
    letter-spacing: 1px;
    text-align: center;
    margin-bottom: 16px;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .bionic-highlight {
    color: var(--accent-color);
    font-weight: 800;
  }
  
  .placeholder {
    font-size: 1.2rem;
    color: var(--text-muted);
  }
  
  .progress-container {
    width: 100%;
    height: 6px;
    background-color: #2a2d38;
    border-radius: 3px;
    overflow: hidden;
  }
  
  .progress-bar {
    height: 100%;
    width: 0%;
    background-color: var(--accent-color);
    transition: width 0.1s linear;
  }
  
  .stats-bar {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 8px;
  }
  
  .stats-bar strong {
    color: var(--text-main);
  }
  
  .controls {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: space-between;
    align-items: center;
    background-color: var(--card-bg);
    padding: 16px;
    border-radius: 8px;
    border: 1px solid #2a2d38;
  }
  
  .control-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }
  
  select {
    background-color: #0d0e12;
    color: var(--text-main);
    border: 1px solid #2a2d38;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.95rem;
    cursor: pointer;
  }
  
  .btn-group {
    display: flex;
    gap: 8px;
  }
  
  button {
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
  }
  
  button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
  }
  
  .shortcuts-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
  }
  
  .shortcuts-hint code {
    background-color: var(--card-bg);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid #2a2d38;
    color: var(--text-main);
  }
  
  .file-upload-box {
    border: 2px dashed #2a2d38;
    border-radius: 8px;
    padding: 16px;
    text-align: center;
    background-color: var(--card-bg);
    cursor: pointer;
    margin-bottom: 12px;
    transition: border-color 0.2s ease, background-color 0.2s ease;
  }
  
  .file-upload-box:hover,
  .file-upload-box.drag-over {
    border-color: var(--accent-color);
    background-color: #1f222d;
  }
  
  .file-label {
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.95rem;
  }
  
  .file-label strong {
    color: var(--accent-color);
  }
  
  textarea {
    width: 100%;
    height: 150px;
    background-color: var(--card-bg);
    border: 1px solid #2a2d38;
    color: var(--text-main);
    border-radius: 8px;
    padding: 12px;
    font-size: 1rem;
    box-sizing: border-box;
  }

  :root {
    --bg-color: #0d0e12;
    --card-bg: #16181f;
    --accent-color: #ff6b00;
    --text-main: #f0f0f0;
    --text-muted: #8a8f9d;
    --border-color: #2a2d38;
  }
  
  [data-theme="light"] {
    --bg-color: #f4f5f8;
    --card-bg: #ffffff;
    --accent-color: #e65100;
    --text-main: #1a1a1a;
    --text-muted: #666666;
    --border-color: #e0e0e0;
  }
  
  body {
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: system-ui, -apple-system, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    transition: background-color 0.2s ease, color 0.2s ease;
  }
  
  .container {
    width: 90%;
    max-width: 680px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px 0;
  }
  
  header .header-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  header h1 {
    margin: 0;
    color: var(--accent-color);
  }
  
  header p {
    margin: 4px 0 0;
    color: var(--text-muted);
  }
  
  .theme-btn {
    background-color: var(--card-bg);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
  }
  
  .reader-box {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 180px;
  }
  
  .word-display {
    font-size: 3rem;
    letter-spacing: 1px;
    text-align: center;
    margin-bottom: 16px;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .word-display.dyslexic-font {
    font-family: 'OpenDyslexicRegular', sans-serif !important;
  }
  
  .bionic-highlight {
    color: var(--accent-color);
    font-weight: 800;
  }
  
  .placeholder {
    font-size: 1.2rem;
    color: var(--text-muted);
  }
  
  .progress-container {
    width: 100%;
    height: 6px;
    background-color: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
  }
  
  .progress-bar {
    height: 100%;
    width: 0%;
    background-color: var(--accent-color);
    transition: width 0.1s linear;
  }
  
  .stats-bar {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 8px;
  }
  
  .stats-bar strong {
    color: var(--text-main);
  }
  
  .controls {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: space-between;
    align-items: center;
    background-color: var(--card-bg);
    padding: 16px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
  }
  
  .control-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }
  
  .checkbox-group {
    flex-direction: row;
    align-items: center;
    gap: 8px;
  }
  
  .checkbox-group label {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
  }
  
  select {
    background-color: var(--bg-color);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.95rem;
    cursor: pointer;
  }
  
  .btn-group {
    display: flex;
    gap: 8px;
  }
  
  button {
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
  }
  
  button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
  }
  
  .shortcuts-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
  }
  
  .shortcuts-hint code {
    background-color: var(--card-bg);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    color: var(--text-main);
  }
  
  .file-upload-box {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 16px;
    text-align: center;
    background-color: var(--card-bg);
    cursor: pointer;
    margin-bottom: 12px;
    transition: border-color 0.2s ease, background-color 0.2s ease;
  }
  
  .file-upload-box:hover,
  .file-upload-box.drag-over {
    border-color: var(--accent-color);
  }
  
  .file-label {
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.95rem;
  }
  
  .file-label strong {
    color: var(--accent-color);
  }
  
  textarea {
    width: 100%;
    height: 150px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 8px;
    padding: 12px;
    font-size: 1rem;
    box-sizing: border-box;
  }


  :root {
    --bg-color: #0d0e12;
    --card-bg: #16181f;
    --accent-color: #ff6b00;
    --text-main: #f0f0f0;
    --text-muted: #8a8f9d;
    --border-color: #2a2d38;
  }
  
  [data-theme="light"] {
    --bg-color: #f4f5f8;
    --card-bg: #ffffff;
    --accent-color: #e65100;
    --text-main: #1a1a1a;
    --text-muted: #666666;
    --border-color: #e0e0e0;
  }
  
  body {
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: system-ui, -apple-system, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    transition: background-color 0.2s ease, color 0.2s ease;
  }
  
  .container {
    width: 90%;
    max-width: 680px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px 0;
  }
  
  header .header-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  header h1 {
    margin: 0;
    color: var(--accent-color);
  }
  
  header p {
    margin: 4px 0 0;
    color: var(--text-muted);
  }
  
  .theme-btn {
    background-color: var(--card-bg);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
  }
  
  .reader-box {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 180px;
  }
  
  .word-display {
    font-size: 3rem;
    letter-spacing: 1px;
    text-align: center;
    margin-bottom: 16px;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .word-display.dyslexic-font {
    font-family: 'OpenDyslexicRegular', sans-serif !important;
  }
  
  .bionic-highlight {
    color: var(--accent-color);
    font-weight: 800;
  }
  
  .placeholder {
    font-size: 1.2rem;
    color: var(--text-muted);
  }
  
  .progress-container {
    width: 100%;
    height: 6px;
    background-color: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
  }
  
  .progress-bar {
    height: 100%;
    width: 0%;
    background-color: var(--accent-color);
    transition: width 0.1s linear;
  }
  
  .stats-bar {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 8px;
  }
  
  .stats-bar strong {
    color: var(--text-main);
  }
  
  .controls {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: space-between;
    align-items: center;
    background-color: var(--card-bg);
    padding: 16px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
  }
  
  .control-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }
  
  .checkbox-group {
    flex-direction: row;
    align-items: center;
    gap: 8px;
  }
  
  .checkbox-group label {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
  }
  
  select {
    background-color: var(--bg-color);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.95rem;
    cursor: pointer;
  }
  
  .btn-group {
    display: flex;
    gap: 8px;
  }
  
  button {
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
  }
  
  button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
  }
  
  .shortcuts-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
  }
  
  .shortcuts-hint code {
    background-color: var(--card-bg);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    color: var(--text-main);
  }
  
  .input-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  
  .url-fetch-box {
    display: flex;
    gap: 8px;
  }
  
  .url-fetch-box input {
    flex: 1;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 0.95rem;
  }
  
  .url-fetch-box button {
    white-space: nowrap;
  }
  
  .file-upload-box {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 14px;
    text-align: center;
    background-color: var(--card-bg);
    cursor: pointer;
    transition: border-color 0.2s ease, background-color 0.2s ease;
  }
  
  .file-upload-box:hover,
  .file-upload-box.drag-over {
    border-color: var(--accent-color);
  }
  
  .file-label {
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.95rem;
  }
  
  .file-label strong {
    color: var(--accent-color);
  }
  
  textarea {
    width: 100%;
    height: 140px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 8px;
    padding: 12px;
    font-size: 1rem;
    box-sizing: border-box;
  }

  :root {
    --bg-color: #0d0e12;
    --card-bg: #16181f;
    --accent-color: #ff6b00;
    --text-main: #f0f0f0;
    --text-muted: #8a8f9d;
    --border-color: #2a2d38;
  }
  
  [data-theme="light"] {
    --bg-color: #f4f5f8;
    --card-bg: #ffffff;
    --accent-color: #e65100;
    --text-main: #1a1a1a;
    --text-muted: #666666;
    --border-color: #e0e0e0;
  }
  
  body {
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: system-ui, -apple-system, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    transition: background-color 0.2s ease, color 0.2s ease;
  }
  
  .container {
    width: 90%;
    max-width: 680px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 20px 0;
  }
  
  header .header-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  header h1 {
    margin: 0;
    color: var(--accent-color);
  }
  
  header p {
    margin: 4px 0 0;
    color: var(--text-muted);
  }
  
  .theme-btn {
    background-color: var(--card-bg);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
  }
  
  /* Statistics Dashboard */
  .stats-dashboard {
    display: flex;
    justify-content: space-between;
    gap: 12px;
  }
  
  .stat-card {
    flex: 1;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 2px;
  }
  
  .stat-value {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--accent-color);
  }
  
  .stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }
  
  .reader-box {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 180px;
  }
  
  .word-display {
    font-size: 3rem;
    letter-spacing: 1px;
    text-align: center;
    margin-bottom: 16px;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .word-display.dyslexic-font {
    font-family: 'OpenDyslexicRegular', sans-serif !important;
  }
  
  .bionic-highlight {
    color: var(--accent-color);
    font-weight: 800;
  }
  
  .placeholder {
    font-size: 1.1rem;
    color: var(--text-muted);
  }
  
  /* Scrub Bar & Paragraph Markers */
  .scrub-container {
    position: relative;
    width: 100%;
    height: 10px;
    background-color: var(--border-color);
    border-radius: 5px;
    cursor: pointer;
    overflow: hidden;
  }
  
  .progress-bar {
    height: 100%;
    width: 0%;
    background-color: var(--accent-color);
    transition: width 0.1s linear;
  }
  
  .paragraph-markers {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
  }
  
  .marker {
    position: absolute;
    top: 0;
    width: 2px;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.4);
    z-index: 2;
  }
  
  .stats-bar {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 10px;
  }
  
  .stats-bar strong {
    color: var(--text-main);
  }
  
  .controls {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: space-between;
    align-items: center;
    background-color: var(--card-bg);
    padding: 16px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
  }
  
  .control-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }
  
  .checkbox-group {
    flex-direction: row;
    align-items: center;
    gap: 8px;
  }
  
  .checkbox-group label {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
  }
  
  select {
    background-color: var(--bg-color);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
  }
  
  .btn-group {
    display: flex;
    gap: 6px;
  }
  
  button {
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    padding: 8px 14px;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
  }
  
  button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
  }
  
  #rewind-btn {
    background-color: var(--border-color);
    color: var(--text-main);
  }
  
  .shortcuts-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
  }
  
  .shortcuts-hint code {
    background-color: var(--card-bg);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    color: var(--text-main);
  }
  
  .input-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  
  .input-row {
    display: flex;
    gap: 8px;
  }
  
  .input-row input {
    flex: 1;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.9rem;
  }
  
  .file-upload-box {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 12px;
    text-align: center;
    background-color: var(--card-bg);
    cursor: pointer;
    transition: border-color 0.2s ease;
  }
  
  .file-upload-box:hover,
  .file-upload-box.drag-over {
    border-color: var(--accent-color);
  }
  
  .file-label {
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.9rem;
  }
  
  .file-label strong {
    color: var(--accent-color);
  }
  
  textarea {
    width: 100%;
    height: 120px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 8px;
    padding: 10px;
    font-size: 0.95rem;
    box-sizing: border-box;
  }

  :root {
    --bg-color: #0d0e12;
    --card-bg: #16181f;
    --accent-color: #ff6b00;
    --text-main: #f0f0f0;
    --text-muted: #8a8f9d;
    --border-color: #2a2d38;
  }
  
  [data-theme="light"] {
    --bg-color: #f4f5f8;
    --card-bg: #ffffff;
    --accent-color: #e65100;
    --text-main: #1a1a1a;
    --text-muted: #666666;
    --border-color: #e0e0e0;
  }
  
  body {
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: system-ui, -apple-system, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    transition: background-color 0.2s ease, color 0.2s ease;
    overflow-x: hidden;
  }
  
  .container {
    width: 90%;
    max-width: 680px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 20px 0;
  }
  
  header .header-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  header h1 {
    margin: 0;
    color: var(--accent-color);
  }
  
  header p {
    margin: 4px 0 0;
    color: var(--text-muted);
  }
  
  .header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  
  .theme-btn {
    background-color: var(--card-bg);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
  }
  
  /* Auth Component & Profile Dropdown */
  .auth-container {
    position: relative;
  }
  
  .auth-btn {
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    padding: 6px 14px;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
  }
  
  .profile-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 20px;
    cursor: pointer;
  }
  
  .avatar {
    width: 24px;
    height: 24px;
    background-color: var(--accent-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: bold;
  }
  
  .profile-email {
    font-size: 0.85rem;
    max-width: 120px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  
  .auth-dropdown {
    position: absolute;
    top: 110%;
    right: 0;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    display: none;
    flex-direction: column;
    width: 160px;
    z-index: 100;
  }
  
  .auth-dropdown.active {
    display: flex;
  }
  
  .dropdown-item {
    background: none;
    border: none;
    color: var(--text-main);
    padding: 10px 14px;
    text-align: left;
    font-size: 0.85rem;
    cursor: pointer;
    width: 100%;
  }
  
  .dropdown-item:hover {
    background-color: var(--border-color);
  }
  
  /* Slide-Out History Drawer */
  .drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 998;
  }
  
  .drawer-overlay.active {
    opacity: 1;
    visibility: visible;
  }
  
  .history-drawer {
    position: fixed;
    top: 0;
    right: -360px;
    width: 320px;
    height: 100vh;
    background-color: var(--card-bg);
    border-left: 1px solid var(--border-color);
    box-shadow: -4px 0 16px rgba(0, 0, 0, 0.2);
    transition: right 0.3s ease;
    z-index: 999;
    display: flex;
    flex-direction: column;
  }
  
  .history-drawer.active {
    right: 0;
  }
  
  .drawer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
  }
  
  .drawer-header h3 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-main);
  }
  
  .icon-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
  }
  
  .history-list {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  
  .history-card {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  
  .history-card-title {
    font-size: 0.9rem;
    font-weight: bold;
    color: var(--text-main);
    line-height: 1.3;
  }
  
  .history-card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
  }
  
  .load-session-btn {
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: bold;
    cursor: pointer;
    align-self: flex-start;
  }
  
  .empty-history {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 40px;
  }
  
  /* Statistics Dashboard */
  .stats-dashboard {
    display: flex;
    justify-content: space-between;
    gap: 12px;
  }
  
  .stat-card {
    flex: 1;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 2px;
  }
  
  .stat-value {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--accent-color);
  }
  
  .stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }
  
  .reader-box {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 180px;
  }
  
  .word-display {
    font-size: 3rem;
    letter-spacing: 1px;
    text-align: center;
    margin-bottom: 16px;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .word-display.dyslexic-font {
    font-family: 'OpenDyslexicRegular', sans-serif !important;
  }
  
  .bionic-highlight {
    color: var(--accent-color);
    font-weight: 800;
  }
  
  .placeholder {
    font-size: 1.1rem;
    color: var(--text-muted);
  }
  
  /* Scrub Bar & Paragraph Markers */
  .scrub-container {
    position: relative;
    width: 100%;
    height: 10px;
    background-color: var(--border-color);
    border-radius: 5px;
    cursor: pointer;
    overflow: hidden;
  }
  
  .progress-bar {
    height: 100%;
    width: 0%;
    background-color: var(--accent-color);
    transition: width 0.1s linear;
  }
  
  .paragraph-markers {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
  }
  
  .marker {
    position: absolute;
    top: 0;
    width: 2px;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.4);
    z-index: 2;
  }
  
  .stats-bar {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 10px;
  }
  
  .stats-bar strong {
    color: var(--text-main);
  }
  
  .controls {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: space-between;
    align-items: center;
    background-color: var(--card-bg);
    padding: 16px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
  }
  
  .control-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }
  
  .checkbox-group {
    flex-direction: row;
    align-items: center;
    gap: 8px;
  }
  
  .checkbox-group label {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
  }
  
  select {
    background-color: var(--bg-color);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
  }
  
  .btn-group {
    display: flex;
    gap: 6px;
  }
  
  button {
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    padding: 8px 14px;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
  }
  
  button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
  }
  
  #rewind-btn {
    background-color: var(--border-color);
    color: var(--text-main);
  }
  
  .shortcuts-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
  }
  
  .shortcuts-hint code {
    background-color: var(--card-bg);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    color: var(--text-main);
  }
  
  .input-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  
  .input-row {
    display: flex;
    gap: 8px;
  }
  
  .input-row input {
    flex: 1;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.9rem;
  }
  
  .file-upload-box {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 12px;
    text-align: center;
    background-color: var(--card-bg);
    cursor: pointer;
    transition: border-color 0.2s ease;
  }
  
  .file-upload-box:hover,
  .file-upload-box.drag-over {
    border-color: var(--accent-color);
  }
  
  .file-label {
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.9rem;
  }
  
  .file-label strong {
    color: var(--accent-color);
  }
  
  textarea {
    width: 100%;
    height: 120px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 8px;
    padding: 10px;
    font-size: 0.95rem;
    box-sizing: border-box;
  }


  /* Custom Auth Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  width: 90%;
  max-width: 400px;
  padding: 24px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
  transform: translateY(10px);
  transition: transform 0.25s ease;
}

.modal-overlay.active .modal-card {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--text-main);
}

.modal-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 8px 0 20px 0;
  line-height: 1.4;
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-group label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.input-group input {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.input-group input:focus {
  border-color: var(--accent-color);
}

.modal-submit-btn {
  background-color: var(--accent-color);
  color: #fff;
  border: none;
  padding: 12px;
  border-radius: 6px;
  font-weight: bold;
  font-size: 0.95rem;
  cursor: pointer;
  margin-top: 6px;
  transition: opacity 0.2s ease;
}

.modal-submit-btn:hover {
  opacity: 0.9;
}

.google-auth-box {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 12px 0 8px 0;
  width: 100%;
}