diff --git a/src/FastExcelWriter/Excel.php b/src/FastExcelWriter/Excel.php
index ef1e5e3..4d12c0b 100644
--- a/src/FastExcelWriter/Excel.php
+++ b/src/FastExcelWriter/Excel.php
@@ -1642,6 +1642,62 @@ public function output(string $name = null)
     {
         $this->download($name);
     }
+
+    public function getDefaultStyle(): array
+    {
+        return $this->style->getDefaultStyle();
+    }
+
+    public function getHyperlinkStyle(): array
+    {
+        return $this->style->getHyperlinkStyle();
+    }
+
+    public function getDefaultFormatStyles(): array
+    {
+        return $this->style->getDefaultFormatStyles();
+    }
+
+    public function getStyleLocaleSettings(): array
+    {
+        return $this->style->getLocaleSettings();
+    }
+
+    public function getStyleFonts(): array
+    {
+        return $this->style->getStyleFonts();
+    }
+
+    public function getStyleFills(): array
+    {
+        return $this->style->getStyleFonts();
+    }
+
+    public function getStyleBorders(): array
+    {
+        return $this->style->getStyleBorders();
+    }
+
+    public function getStyleCellXfs(): array
+    {
+        return $this->style->getStyleCellXfs();
+    }
+
+    public function getStyleIndexedColors(): array
+    {
+        return $this->style->getIndexedColors();
+    }
+
+    public function addStyle($cellStyle, &$resultStyle): array
+    {
+        return $this->style->addStyle($cellStyle, $resultStyle);
+    }
+
+    public function getStyleNumberFormats(): array
+    {
+        return $this->style->_getNumberFormats();
+    }
+
 }
 
  // EOF
diff --git a/src/FastExcelWriter/Sheet.php b/src/FastExcelWriter/Sheet.php
index 5af9f3d..ee05e07 100644
--- a/src/FastExcelWriter/Sheet.php
+++ b/src/FastExcelWriter/Sheet.php
@@ -1472,14 +1472,14 @@ protected function _writeRow(?Writer $writer, array $row = [], array $rowOptions
             if (empty($this->sheetStylesSummary)) {
                 if ($this->defaultStyle) {
                     $this->sheetStylesSummary = [
-                        'general_style' => Style::mergeStyles([$this->excel->style->defaultStyle, $this->defaultStyle]),
-                        'hyperlink_style' => Style::mergeStyles([$this->excel->style->hyperlinkStyle, $this->defaultStyle]),
+                        'general_style' => Style::mergeStyles([$this->excel->getDefaultStyle(), $this->defaultStyle]),
+                        'hyperlink_style' => Style::mergeStyles([$this->excel->getHyperlinkStyle(), $this->defaultStyle]),
                     ];
                 }
                 else {
                     $this->sheetStylesSummary = [
-                        'general_style' => $this->excel->style->defaultStyle,
-                        'hyperlink_style' => $this->excel->style->hyperlinkStyle,
+                        'general_style' => $this->excel->getDefaultStyle(),
+                        'hyperlink_style' => $this->excel->getHyperlinkStyle(),
                     ];
                 }
             }
@@ -1534,8 +1534,8 @@ protected function _writeRow(?Writer $writer, array $row = [], array $rowOptions
                         else {
                             $cellStyle = $styleStack ? $styleStack[0] : [];
                         }
-                        if (!empty($cellStyle['format']['format-pattern']) && !empty($this->excel->style->defaultFormatStyles[$cellStyle['format']['format-pattern']])) {
-                            $cellStyle = Style::mergeStyles([$this->excel->style->defaultFormatStyles[$cellStyle['format']['format-pattern']], $cellStyle]);
+                        if (!empty($cellStyle['format']['format-pattern']) && !empty($this->excel->getDefaultFormatStyles()[$cellStyle['format']['format-pattern']])) {
+                            $cellStyle = Style::mergeStyles([$this->excel->getDefaultFormatStyles()[$cellStyle['format']['format-pattern']], $cellStyle]);
                         }
 
                         if (isset($cellStyle['hyperlink'])) {
@@ -1551,8 +1551,8 @@ protected function _writeRow(?Writer $writer, array $row = [], array $rowOptions
                                     'shared_index' => $this->excel->addSharedString($cellValue),
                                 ];
                                 $this->_addExternalLink(Excel::cellAddress($rowIdx + 1, $colIdx + 1), $link);
-                                if (!empty($this->excel->style->hyperlinkStyle)) {
-                                    $cellStyle = Style::mergeStyles([$this->excel->style->hyperlinkStyle, $cellStyle]);
+                                if (!empty($this->excel->getHyperlinkStyle())) {
+                                    $cellStyle = Style::mergeStyles([$this->excel->getHyperlinkStyle(), $cellStyle]);
                                 }
                             }
                             unset($cellStyle['hyperlink']);
@@ -1560,7 +1560,7 @@ protected function _writeRow(?Writer $writer, array $row = [], array $rowOptions
 
                         $styleHash = $cellStyle ? json_encode($cellStyle) : '';
                         if (!isset($_styleCache[$styleHash])) {
-                            $cellStyleIdx = $this->excel->style->addStyle($cellStyle, $resultStyle);
+                            $cellStyleIdx = $this->excel->addStyle($cellStyle, $resultStyle);
                             $_styleCache[$styleHash] = ['cell_style' => $cellStyle, 'result_style' => $resultStyle, 'style_idx' => $cellStyleIdx];
                         }
                         else {
diff --git a/src/FastExcelWriter/Style.php b/src/FastExcelWriter/Style.php
index 2fe4746..6d5ea70 100644
--- a/src/FastExcelWriter/Style.php
+++ b/src/FastExcelWriter/Style.php
@@ -86,20 +86,20 @@ class Style
 
     protected static $instance;
 
-    public array $localeSettings = [];
+    protected array $localeSettings = [];
 
     public array $defaultFont = [];
     protected int $defaultFontId = -1;
 
-    public array $defaultStyle = [];
+    protected array $defaultStyle = [];
 
     /** @var array Specified styles for hyperlinks */
-    public array $hyperlinkStyle = [];
+    protected array $hyperlinkStyle = [];
 
     /** @var array Specified styles for formats '@...'  */
-    public array $defaultFormatStyles = [];
+    protected array $defaultFormatStyles = [];
 
-    public array $indexedColors = ['00000000',
+    protected array $indexedColors = ['00000000',
         '00FFFFFF', '00FF0000', '0000FF00', '000000FF', '00FFFF00', '00FF00FF', '0000FFFF', '00000000', '00FFFFFF',
         '00FF0000', '0000FF00', '000000FF', '00FFFF00', '00FF00FF', '0000FFFF', '00800000', '00008000', '00000080',
         '00808000', '00800080', '00008080', '00C0C0C0', '00808080', '009999FF', '00993366', '00FFFFCC', '00CCFFFF',
@@ -1606,6 +1606,30 @@ public function _getNumberFormats(): array
         }
         return [];
     }
+
+    public function getDefaultStyle(): array
+    {
+        return $this->defaultStyle;
+    }
+    public function getHyperlinkStyle(): array
+    {
+        return $this->hyperlinkStyle;
+    }
+
+    public function getDefaultFormatStyles(): array
+    {
+        return $this->defaultFormatStyles;
+    }
+
+    public function getLocaleSettings(): array
+    {
+        return $this->localeSettings;
+    }
+
+    public function getIndexedColors(): array
+    {
+        return $this->indexedColors;
+    }
 }
 
 // EOF
diff --git a/src/FastExcelWriter/Writer/Writer.php b/src/FastExcelWriter/Writer/Writer.php
index 4684e39..64ace0f 100644
--- a/src/FastExcelWriter/Writer/Writer.php
+++ b/src/FastExcelWriter/Writer/Writer.php
@@ -1282,11 +1282,11 @@ protected function _convertFormula($formula, $baseAddress): string
             return $matches[0];
         }, $formula);
 
-        if (!empty($this->excel->style->localeSettings['functions']) && strpos($formula, '(')) {
+        if (!empty($this->excel->getStyleLocaleSettings()['functions']) && strpos($formula, '(')) {
             // replace national function names
             if (empty($functionNames)) {
                 $functionNames = [[], []];
-                foreach ($this->excel->style->localeSettings['functions'] as $name => $nameEn) {
+                foreach ($this->excel->getStyleLocaleSettings()['functions'] as $name => $nameEn) {
                     $functionNames[0][] = '/' . $name . '\s*\(/ui';
                     $functionNames[1][] = $nameEn . '(';
                     if ($nameEn === 'FALSE' || $nameEn === 'TRUE') {
@@ -1482,7 +1482,7 @@ protected function _writeStylesXML()
 
         //// +++++++++++
         //// <numFmts/>
-        $numberFormats = $this->excel->style->_getNumberFormats();
+        $numberFormats = $this->excel->getStyleNumberFormats();
         if (!$numberFormats) {
             $file->write('<numFmts count="0"/>');
         } else {
@@ -1495,7 +1495,7 @@ protected function _writeStylesXML()
 
         //// +++++++++++
         //// <fonts/>
-        $fonts = $this->excel->style->getStyleFonts();
+        $fonts = $this->excel->getStyleFonts();
         if (!$fonts) {
             $file->write('<fonts count="0"/>');
         }
@@ -1511,7 +1511,7 @@ protected function _writeStylesXML()
 
         //// +++++++++++
         //// <fills/>
-        $fills = $this->excel->style->getStyleFills();
+        $fills = $this->excel->getStyleFills();
         if (!$fills) {
             $file->write('<fills count="0"/>');
         }
@@ -1525,7 +1525,7 @@ protected function _writeStylesXML()
 
         //// +++++++++++
         // <borders/>
-        $borders = $this->excel->style->getStyleBorders();
+        $borders = $this->excel->getStyleBorders();
         if (!$borders) {
             $file->write('<borders count="0"/>');
         }
@@ -1550,7 +1550,7 @@ protected function _writeStylesXML()
 
         //// +++++++++++
         // <cellXfs/>
-        $cellXfs = $this->excel->style->getStyleCellXfs();
+        $cellXfs = $this->excel->getStyleCellXfs();
         if (!$cellXfs) {
             $file->write('<cellXfs count="1">');
             $file->write('<xf numFmtId="0" fontId="0" fillId="0" borderId="0" xfId="0"/>');
@@ -1640,9 +1640,9 @@ protected function _writeStylesXML()
         // <tableStyles/>
         $file->write('<tableStyles count="0"/>');
 
-        if ($this->excel->style->indexedColors) {
+        if ($this->excel->getStyleIndexedColors()) {
             $file->write('<colors><indexedColors>');
-            foreach ($this->excel->style->indexedColors as $color) {
+            foreach ($this->excel->getStyleIndexedColors() as $color) {
                 $file->write('<rgbColor rgb="' . $color . '"/>');
             }
             $file->write('</indexedColors></colors>');