diff --git a/class/class.thumbnail.php b/class/class.thumbnail.php
index a8d7693..6f9f505 100644
--- a/class/class.thumbnail.php
+++ b/class/class.thumbnail.php
@@ -1,10 +1,15 @@
 <?php
-	/**
-	 * Image_Toolbox.class.php -- PHP image manipulation class
-	 *
-	 * Copyright (C) 2003 Martin Theimer <pappkamerad@decoded.net>
-	 *
-	 */
+
+/**
+ * Image_Toolbox.class.php -- PHP image manipulation class
+ *
+ * Copyright (C) 2003 Martin Theimer <pappkamerad@decoded.net>
+ * Refactored for PHP 8.4 (2026) by Alexander Salnikov (aka Repellent)
+ * * Major updates:
+ * - Full Alpha Channel support for Indexed PNG & WebP
+ * - Optimized for GdImage objects (PHP 8+)
+ * - Modernized memory management and type safety
+ */
 
 
 	if (! defined('IMAGE_TOOLBOX_DEFAULT_PNG_QUALITY'))
@@ -465,6 +470,11 @@
 		 *
 		 * @access private
 		 */
+/**
+		 * Generate a new image resource based on the given parameters
+		 *
+		 * @access private
+		 */
 		function _addImage($argc, $args)
 		{
 			if (($argc == 2 || $argc == 3) && is_int($args[0]) && is_int($args[1]) && (is_string($args[2]) || ! isset($args[2])))
@@ -485,12 +495,22 @@
 
 				$this->_img['operator']['resource'] = $functionname($this->_img['operator']['width'], $this->_img['operator']['height']);
 
-				// set default type jpg.
+				if ($this->_imagecreatefunction == 'imagecreatetruecolor')
+				{
+					imagealphablending($this->_img['operator']['resource'], false);
+					imagesavealpha($this->_img['operator']['resource'], true);
+					
+					if (!isset($args[2]))
+					{
+						$transparent = imagecolorallocatealpha($this->_img['operator']['resource'], 255, 255, 255, 127);
+						imagefill($this->_img['operator']['resource'], 0, 0, $transparent);
+					}
+				}
+
 				$this->_img['operator']['type'] = 2;
 
 				if (isset($args[2]) && is_string($args[2]))
 				{
-					//neues bild mit farbe fЃllen
 					$fillcolor = $this->_hexToPHPColor($args[2]);
 
 					imagefill($this->_img['operator']['resource'], 0, 0, $fillcolor);
@@ -504,7 +524,6 @@
 			}
 			elseif ($argc == 1 && is_string($args[0]))
 			{
-				//bild aus datei laden. width und height original gr”sse
 				$this->_img['operator'] = $this->_loadFile($args[0]);
 
 				$this->_img['operator']['indexedcolors'] = imagecolorstotal($this->_img['operator']['resource']);
@@ -526,7 +545,7 @@
 		 * @param string $filename imagefile to load
 		 * @return array associative array with the loaded filedata
 		 */
-		function _loadFile($filename)
+        function _loadFile($filename)
 		{
 			if (file_exists($filename))
 			{
@@ -540,7 +559,7 @@
 					? ($filedata['bias'] = IMAGE_TOOLBOX_BIAS_HORIZONTAL)
 					: ($filedata['bias'] = IMAGE_TOOLBOX_BIAS_VERTICAL);
 
-			   	$filedata['aspectratio'] = $filedata['width'] / $filedata['height'];
+				$filedata['aspectratio'] = $filedata['width'] / $filedata['height'];
 				$filedata['type'] = $info[2];
 
 				if ($this->_types[$filedata['type']]['supported'] < 1)
@@ -551,63 +570,76 @@
 
 				switch ($filedata['type'])
 				{
-					case 1:
+					case 1: // GIF
 						$dummy = imagecreatefromgif($filename);
 						$functionname = $this->_imagecreatefunction;
 						$filedata['resource'] = $functionname($filedata['width'], $filedata['height']);
+						
+						if ($this->_imagecreatefunction == 'imagecreatetruecolor') {
+							imagealphablending($filedata['resource'], false);
+							imagesavealpha($filedata['resource'], true);
+							$transparent = imagecolorallocatealpha($filedata['resource'], 255, 255, 255, 127);
+							imagefill($filedata['resource'], 0, 0, $transparent);
+						}
+						
 						imagecopy($filedata['resource'], $dummy, 0, 0, 0, 0, $filedata['width'], $filedata['height']);
 						imagedestroy($dummy);
 						break;
 
-					case 2:
+					case 2: // JPG
 						$filedata['resource'] = imagecreatefromjpeg($filename);
 						break;
 
-					case 3:
+					case 3: // PNG
 						$dummy = imagecreatefrompng($filename);
 
 						if (imagecolorstotal($dummy) != 0)
 						{
 							$functionname = $this->_imagecreatefunction;
 							$filedata['resource'] = $functionname($filedata['width'], $filedata['height']);
+							
+							if ($this->_imagecreatefunction == 'imagecreatetruecolor') {
+								imagealphablending($filedata['resource'], false);
+								imagesavealpha($filedata['resource'], true);
+								$transparent = imagecolorallocatealpha($filedata['resource'], 255, 255, 255, 127);
+								imagefill($filedata['resource'], 0, 0, $transparent);
+							}
+							
 							imagecopy($filedata['resource'], $dummy, 0, 0, 0, 0, $filedata['width'], $filedata['height']);
+							imagedestroy($dummy);
 						}
 						else
 						{
 							$filedata['resource'] = $dummy;
+							imagealphablending($filedata['resource'], false);
+							imagesavealpha($filedata['resource'], true);
 						}
-						unset($dummy);
 						break;
 
-					case 4:
-					case 5:
-					case 6:
-					case 7:
-					case 8:
-					case 9:
-					case 10:
-					case 11:
-					case 12:
-					case 13:
-					case 14:
-					case 15:
-					case 15:
-					case 16:
-					case 17:
-					case 18:
+					case 18: // WebP
 						$dummy = imagecreatefromwebp($filename);
 
 						if (imagecolorstotal($dummy) != 0)
 						{
 							$functionname = $this->_imagecreatefunction;
 							$filedata['resource'] = $functionname($filedata['width'], $filedata['height']);
+							
+							if ($this->_imagecreatefunction == 'imagecreatetruecolor') {
+								imagealphablending($filedata['resource'], false);
+								imagesavealpha($filedata['resource'], true);
+								$transparent = imagecolorallocatealpha($filedata['resource'], 255, 255, 255, 127);
+								imagefill($filedata['resource'], 0, 0, $transparent);
+							}
+
 							imagecopy($filedata['resource'], $dummy, 0, 0, 0, 0, $filedata['width'], $filedata['height']);
+							imagedestroy($dummy);
 						}
 						else
 						{
 							$filedata['resource'] = $dummy;
+							imagealphablending($filedata['resource'], false);
+							imagesavealpha($filedata['resource'], true);
 						}
-						unset($dummy);
 						break;						
 
 					default:
@@ -645,7 +677,7 @@
 		 * @param bool $dither use dither
 		 * @return bool true on success, otherwise false
 		 */
-		function output($output_type = false, $output_quality = false, $dither = false)
+        function output($output_type = false, $output_quality = false, $dither = false)
 		{
 			if ($output_type === false)
 				$output_type = $this->_img['main']['output_type'];
@@ -668,17 +700,25 @@
 						if ($this->_img['main']['indexedcolors'] == 0)
 						{
 							$dummy = imagecreatetruecolor($this->_img['main']['width'], $this->_img['main']['height']);
+							
+							imagealphablending($dummy, false);
+							imagesavealpha($dummy, true);
+							$transparent = imagecolorallocatealpha($dummy, 255, 255, 255, 127);
+							imagefill($dummy, 0, 0, $transparent);
+
 							imagecopy($dummy, $this->_img['main']['resource'], 0, 0, 0, 0, $this->_img['main']['width'], $this->_img['main']['height']);
 
 							if ($output_quality === false)
-							{
 								$output_quality = IMAGE_TOOLBOX_DEFAULT_8BIT_COLORS;
-							}
 
 							imagetruecolortopalette($dummy, $dither, $output_quality);
+							imagegif($dummy);
+							imagedestroy($dummy);
+						}
+						else
+						{
+							imagegif($this->_img['main']['resource']);
 						}
-						imagegif($dummy);
-						imagedestroy($dummy);
 					}
 					else
 					{
@@ -701,9 +741,7 @@
 					header ('Content-type: ' . $this->_types[$output_type]['mime']);
 
 					if ($output_quality === false)
-					{
 						$output_quality = IMAGE_TOOLBOX_DEFAULT_JPEG_QUALITY;
-					}
 
 					imagejpeg($this->_img['main']['resource'], null, $output_quality);
 					break;
@@ -721,13 +759,14 @@
 					}
 
 					header ('Content-type: ' . $this->_types[$output_type]['mime']);
+					
+					imagealphablending($this->_img['main']['resource'], false);
+					imagesavealpha($this->_img['main']['resource'], true);
 
 					if (version_compare(PHP_VERSION, '5.1.2', '>='))
 					{
 						if ($output_quality === false)
-						{
 							$output_quality = IMAGE_TOOLBOX_DEFAULT_PNG_QUALITY;
-						}
 
 						imagepng($this->_img['main']['resource'], null, $output_quality);
 					}
@@ -754,18 +793,25 @@
 						if ($this->_img['main']['indexedcolors'] == 0)
 						{
 							$dummy = imagecreatetruecolor($this->_img['main']['width'], $this->_img['main']['height']);
+							
+							imagealphablending($dummy, false);
+							imagesavealpha($dummy, true);
+							$transparent = imagecolorallocatealpha($dummy, 255, 255, 255, 127);
+							imagefill($dummy, 0, 0, $transparent);
 
 							imagecopy($dummy, $this->_img['main']['resource'], 0, 0, 0, 0, $this->_img['main']['width'], $this->_img['main']['height']);
-
 							imagetruecolortopalette($dummy, $dither, 255);
 						}
+						else
+						{
+							$dummy = $this->_img['main']['resource'];
+							imagesavealpha($dummy, true);
+						}
 
 						if (version_compare(PHP_VERSION, '5.1.2', '>='))
 						{
 							if ($output_quality === false)
-							{
 								$output_quality = IMAGE_TOOLBOX_DEFAULT_PNG_QUALITY;
-							}
 
 							imagepng($dummy, null, $output_quality);
 						}
@@ -774,27 +820,15 @@
 							imagepng($dummy);
 						}
 
-						imagedestroy($dummy);
+						if ($this->_img['main']['indexedcolors'] == 0)
+							imagedestroy($dummy);
 					}
 					else
 					{
 						imagepng($this->_img['main']['resource']);
 					}
 					break;
-				case 5:
-				case 6:
-				case 7:
-				case 8:
-				case 9:
-				case 10:
-				case 11:
-				case 12:
-				case 13:
-				case 14:
-				case 15:
-				case 15:
-				case 16:
-				case 17:
+
 				case 18:
 				case '18':
 				case 'webp':
@@ -807,13 +841,14 @@
 					}
 
 					header ('Content-type: ' . $this->_types[$output_type]['mime']);
+					
+					imagealphablending($this->_img['main']['resource'], false);
+					imagesavealpha($this->_img['main']['resource'], true);
 
 					if (version_compare(PHP_VERSION, '5.1.2', '>='))
 					{
 						if ($output_quality === false)
-						{
 							$output_quality = IMAGE_TOOLBOX_DEFAULT_WEBP_QUALITY;
-						}
 
 						imagewebp($this->_img['main']['resource'], null, $output_quality);
 					}
@@ -853,10 +888,11 @@
 		 * @param bool $dither use dither
 		 * @return bool true on success, otherwise false
 		 */
-		function save ($filename, $output_type = false, $output_quality = false, $dither = false)
+function save ($filename, $output_type = false, $output_quality = false, $dither = false)
 		{
 			if ($output_type === false)
 				$output_type = $this->_img['main']['output_type'];
+
 			switch ($output_type)
 			{
 				case 1:
@@ -874,20 +910,29 @@
 						if ($this->_img['main']['indexedcolors'] == 0)
 						{
 							$dummy = imagecreatetruecolor($this->_img['main']['width'], $this->_img['main']['height']);
+							
+							imagealphablending($dummy, false);
+							imagesavealpha($dummy, true);
+							$transparent = imagecolorallocatealpha($dummy, 255, 255, 255, 127);
+							imagefill($dummy, 0, 0, $transparent);
+							
 							imagecopy($dummy, $this->_img['main']['resource'], 0, 0, 0, 0, $this->_img['main']['width'], $this->_img['main']['height']);
 
 							if ($output_quality === false)
 								$output_quality = IMAGE_TOOLBOX_DEFAULT_8BIT_COLORS;
 
 							imagetruecolortopalette($dummy, $dither, $output_quality);
+							imagegif($dummy, $filename);
+							imagedestroy($dummy);
+						}
+						else
+						{
+							imagegif($this->_img['main']['resource'], $filename);
 						}
-
-						imagegif($dummy, $filename);
-						imagedestroy($dummy);
 					}
 					else
 					{
-						imagegif($this->_img['main']['resource']);
+						imagegif($this->_img['main']['resource'], $filename);
 					}
 					break;
 
@@ -925,6 +970,9 @@
 						return null;
 					}
 
+					imagealphablending($this->_img['main']['resource'], false);
+					imagesavealpha($this->_img['main']['resource'], true);
+
 					if (version_compare(PHP_VERSION, '5.1.2', '>='))
 					{
 						if ($output_quality === false)
@@ -953,9 +1001,22 @@
 						if ($this->_img['main']['indexedcolors'] == 0)
 						{
 							$dummy = imagecreatetruecolor($this->_img['main']['width'], $this->_img['main']['height']);
+							
+							imagealphablending($dummy, false);
+							imagesavealpha($dummy, true);
+							$transparent = imagecolorallocatealpha($dummy, 255, 255, 255, 127);
+							imagefill($dummy, 0, 0, $transparent);
+							
 							imagecopy($dummy, $this->_img['main']['resource'], 0, 0, 0, 0, $this->_img['main']['width'], $this->_img['main']['height']);
 							imagetruecolortopalette($dummy, $dither, 255);
 						}
+						else
+						{
+							$dummy = $this->_img['main']['resource'];
+						}
+
+						imagealphablending($dummy, false);
+						imagesavealpha($dummy, true);
 
 						if (version_compare(PHP_VERSION, '5.1.2', '>='))
 						{
@@ -968,7 +1029,9 @@
 						{
 							imagepng($dummy, $filename);
 						}
-						imagedestroy($dummy);
+						
+						if ($this->_img['main']['indexedcolors'] == 0) 
+							imagedestroy($dummy);
 					}
 					else
 					{
@@ -976,20 +1039,6 @@
 					}
 					break;
 
-				case 5:
-				case 6:
-				case 7:
-				case 8:
-				case 9:
-				case 10:
-				case 11:
-				case 12:
-				case 13:
-				case 14:
-				case 15:
-				case 15:
-				case 16:
-				case 17:
 				case 18:
 				case '18':
 				case 'webp':
@@ -1000,6 +1049,9 @@
 						trigger_error($this->_error_prefix . 'Imagetype ('.$this->_types[$output_type]['ext'].') not supported for creating/writing.', E_USER_ERROR);
 						return null;
 					}
+					
+					imagealphablending($this->_img['main']['resource'], false);
+					imagesavealpha($this->_img['main']['resource'], true);
 
 					if (version_compare(PHP_VERSION, '5.1.2', '>='))
 					{
@@ -1089,7 +1141,7 @@
 		 * @param string $bgcolor background fillcolor (hexformat, e.g. '#FF0000')
 		 * @return bool true on success, otherwise false
 		 */
-		function newOutputSize($width, $height, $mode = 0, $autorotate = false, $bgcolor = '#000000')
+        function newOutputSize($width, $height, $mode = 0, $autorotate = false, $bgcolor = '#000000')
 		{
 			if ($width > 0 && $height > 0 && is_int($width) && is_int($height))
 			{
@@ -1279,13 +1331,11 @@
                 if ($width != 0)
 				{
 					$this->_img['target']['width'] = $width;
-					// Применяем (integer) ко всему float-выражению
 					$this->_img['target']['height'] = (integer) ($width / $this->_img['main']['aspectratio']);
 				}
 				else
 				{
 					$this->_img['target']['height'] = $height;
-					// Применяем (integer) ко всему float-выражению
 					$this->_img['target']['width'] = (integer) ($height * $this->_img['main']['aspectratio']);
 				}
 
@@ -1305,72 +1355,64 @@
 			//create resized picture
 			$functionname = $this->_imagecreatefunction;
 
-			// ИСПРАВЛЕНИЕ: Явное приведение к (int) перед сложением
             $dummy = $functionname((int) $this->_img['target']['width'] + 1, (int) $this->_img['target']['height'] + 1);
 
-			if ($this->_img['main']['type'] == 3)
+			if ($this->_imagecreatefunction == 'imagecreatetruecolor')
 			{
-				// turning off alpha blending (to ensure alpha channel information
-				// is preserved, rather than removed (blending with the rest of the
-				// image in the form of black))
 				imagealphablending($dummy, false);
-
-				// turning on alpha channel information saving (to ensure the full range
-				// of transparency is preserved)
 				imagesavealpha($dummy, true);
+				
+				$transparent = imagecolorallocatealpha($dummy, 255, 255, 255, 127);
+				imagefill($dummy, 0, 0, $transparent);
 			}
 
 			$resize_function = $this->_resize_function;
 
-			// ИСПРАВЛЕНИЕ: Принудительное приведение всех координат и размеров к int
-$resize_function(
-    $dummy, 
-    $this->_img['main']['resource'], 
-    0, 0, 
-    (int) $cpy_w_offset, 
-    (int) $cpy_h_offset, 
-    (int) $this->_img['target']['width'], 
-    (int) $this->_img['target']['height'], 
-    (int) $cpy_w, 
-    (int) $cpy_h
-);
+			$resize_function(
+				$dummy, 
+				$this->_img['main']['resource'], 
+				0, 0, 
+				(int) $cpy_w_offset, 
+				(int) $cpy_h_offset, 
+				(int) $this->_img['target']['width'], 
+				(int) $this->_img['target']['height'], 
+				(int) $cpy_w, 
+				(int) $cpy_h
+			);
 
 			if ($mode == 2)
 			{
 				$this->_img['target']['resource'] = $functionname($width, $height);
+				
 				$fillcolor = $this->_hexToPHPColor($bgcolor);
 				imagefill($this->_img['target']['resource'], 0, 0, $fillcolor);
 			}
 			else
 			{
-				// ИСПРАВЛЕНИЕ: Принудительное приведение ширины и высоты к int
                 $this->_img['target']['resource'] = $functionname((int) $this->_img['target']['width'], (int) $this->_img['target']['height']);
+				
+				if ($this->_imagecreatefunction == 'imagecreatetruecolor') {
+					imagealphablending($this->_img['target']['resource'], false);
+					imagesavealpha($this->_img['target']['resource'], true);
+					$transparent = imagecolorallocatealpha($this->_img['target']['resource'], 255, 255, 255, 127);
+					imagefill($this->_img['target']['resource'], 0, 0, $transparent);
+				}
+
 				$cpy_w_offset2 = 0;
 				$cpy_h_offset2 = 0;
 			}
 
-			if ($this->_img['main']['type'] == 3)
-			{
-				// turning off alpha blending (to ensure alpha channel information
-				// is preserved, rather than removed (blending with the rest of the
-				// image in the form of black))
-				imagealphablending($this->_img['target']['resource'], false);
-
-				// turning on alpha channel information saving (to ensure the full range
-				// of transparency is preserved)
-				imagesavealpha($this->_img['target']['resource'], true);
-			}
-
-			// ИСПРАВЛЕНИЕ: Принудительное приведение всех координат и размеров к int
-imagecopy(
-    $this->_img['target']['resource'], 
-    $dummy, 
-    (int) $cpy_w_offset2, 
-    (int) $cpy_h_offset2, 
-    0, 0, 
-    (int) $this->_img['target']['width'], 
-    (int) $this->_img['target']['height']
-);
+			imagecopy(
+				$this->_img['target']['resource'], 
+				$dummy, 
+				(int) $cpy_w_offset2, 
+				(int) $cpy_h_offset2, 
+				0, 0, 
+				(int) $this->_img['target']['width'], 
+				(int) $this->_img['target']['height']
+			);
+			
+			imagedestroy($dummy);
 
 			if ($mode == 2)
 			{
@@ -1484,7 +1526,6 @@ imagecopy(
 
                     case 'middle':
 					case 'center':
-						// ИСПРАВЛЕНО: Явное приведение всего выражения к целому числу
 						$dst_x = (integer)((($this->_img['main']['width'] / 2) - ($this->_img['operator']['width'] / 2)) + $xalign_offset); 
 						$src_x = 0;
 						$src_w = $this->_img['operator']['width'];
@@ -1525,7 +1566,6 @@ imagecopy(
 
                     case 'middle':
 					case 'center':
-						// ИСПРАВЛЕНО: Явное приведение всего выражения к целому числу
 						$dst_y = (integer)((($this->_img['main']['height'] / 2) - ($this->_img['operator']['height'] / 2)) + $yalign_offset); 
 						$src_y = 0;
 						$src_h = $this->_img['operator']['height'];