diff --git a/tools/pack_resources/pack_resources.cpp b/tools/pack_resources/pack_resources.cpp
index e0e7800..50e0d09 100644
--- a/tools/pack_resources/pack_resources.cpp
+++ b/tools/pack_resources/pack_resources.cpp
@@ -1,104 +1,97 @@
 #include <filesystem>
 #include <iostream>
+#include <string>
 
 #include "core/resources/resource_pack.h"
 
-static constexpr const char* APP_NAME = "Coffee Crisis";
+namespace {
 
-void showHelp() {
-    std::cout << APP_NAME << " - Resource Packer" << '\n';
-    std::cout << "===============================================" << '\n';
-    std::cout << "Usage: pack_resources [options] [input_dir] [output_file]" << '\n';
-    std::cout << '\n';
-    std::cout << "Options:" << '\n';
-    std::cout << "  --help     Show this help message" << '\n';
-    std::cout << "  --list     List contents of an existing pack file" << '\n';
-    std::cout << '\n';
-    std::cout << "Arguments:" << '\n';
-    std::cout << "  input_dir  Directory to pack (default: data)" << '\n';
-    std::cout << "  output_file Pack file name (default: resources.pack)" << '\n';
-}
+    constexpr const char* APP_NAME = "Coffee Crisis";
 
-void listPackContents(const std::string& packFile) {
-    ResourcePack pack;
-    if (!pack.loadPack(packFile)) {
-        std::cerr << "Error: Cannot open pack file: " << packFile << '\n';
-        return;
+    void showHelp() {
+        std::cout << APP_NAME << " - Resource Packer\n";
+        std::cout << "===============================\n";
+        std::cout << "Usage: pack_resources [options] [input_dir] [output_file]\n\n";
+        std::cout << "Options:\n";
+        std::cout << "  --help    Show this help message\n";
+        std::cout << "  --list    List contents of an existing pack file\n\n";
+        std::cout << "Arguments:\n";
+        std::cout << "  input_dir   Directory to pack (default: data)\n";
+        std::cout << "  output_file Pack file name (default: resources.pack)\n";
     }
 
-    auto resources = pack.getResourceList();
-    std::cout << "Pack file: " << packFile << '\n';
-    std::cout << "Resources: " << resources.size() << '\n';
-    std::cout << "Contents:" << '\n';
-
-    for (const auto& resource : resources) {
-        std::cout << "  " << resource << '\n';
+    void listPackContents(const std::string& pack_file) {
+        ResourcePack pack;
+        if (!pack.loadPack(pack_file)) {
+            std::cerr << "Error: cannot open pack file: " << pack_file << '\n';
+            return;
+        }
+        auto resources = pack.getResourceList();
+        std::cout << "Pack file: " << pack_file << '\n';
+        std::cout << "Resources: " << resources.size() << '\n';
+        for (const auto& r : resources) { std::cout << "  " << r << '\n'; }
     }
-}
+
+}  // namespace
 
 int main(int argc, char* argv[]) {
-    std::string dataDir = "data";
-    std::string outputFile = "resources.pack";
-    bool listMode = false;
-    bool dataDirSet = false;
+    std::string data_dir = "data";
+    std::string output_file = "resources.pack";
+    bool list_mode = false;
+    bool data_dir_set = false;
 
-    for (int i = 1; i < argc; i++) {
+    for (int i = 1; i < argc; ++i) {
         std::string arg = argv[i];
         if (arg == "--help" || arg == "-h") {
             showHelp();
             return 0;
-        } else if (arg == "--list") {
-            listMode = true;
-            if (i + 1 < argc) {
-                outputFile = argv[++i];
-            }
-        } else if (!arg.empty() && arg[0] != '-') {
-            if (!dataDirSet) {
-                dataDir = arg;
-                dataDirSet = true;
+        }
+        if (arg == "--list") {
+            list_mode = true;
+            if (i + 1 < argc) { output_file = argv[++i]; }
+            continue;
+        }
+        if (!arg.empty() && arg[0] != '-') {
+            if (!data_dir_set) {
+                data_dir = arg;
+                data_dir_set = true;
             } else {
-                outputFile = arg;
+                output_file = arg;
             }
         }
     }
 
-    if (listMode) {
-        listPackContents(outputFile);
+    if (list_mode) {
+        listPackContents(output_file);
         return 0;
     }
 
-    std::cout << APP_NAME << " - Resource Packer" << '\n';
-    std::cout << "===============================================" << '\n';
-    std::cout << "Input directory: " << dataDir << '\n';
-    std::cout << "Output file: " << outputFile << '\n';
-    std::cout << '\n';
+    std::cout << APP_NAME << " - Resource Packer\n";
+    std::cout << "===============================\n";
+    std::cout << "Input directory: " << data_dir << '\n';
+    std::cout << "Output file: " << output_file << '\n';
 
-    if (!std::filesystem::exists(dataDir)) {
-        std::cerr << "Error: Input directory does not exist: " << dataDir << '\n';
+    if (!std::filesystem::exists(data_dir)) {
+        std::cerr << "Error: input directory does not exist: " << data_dir << '\n';
         return 1;
     }
 
     ResourcePack pack;
+    std::cout << "Scanning and packing resources...\n";
+    if (!pack.addDirectory(data_dir)) {
+        std::cerr << "Error: failed to add directory to pack\n";
+        return 1;
+    }
+    std::cout << "Found " << pack.getResourceCount() << " resources\n";
 
-    std::cout << "Scanning and packing resources..." << '\n';
-    if (!pack.addDirectory(dataDir)) {
-        std::cerr << "Error: Failed to add directory to pack" << '\n';
+    std::cout << "Saving pack file...\n";
+    if (!pack.savePack(output_file)) {
+        std::cerr << "Error: failed to save pack file\n";
         return 1;
     }
 
-    std::cout << "Found " << pack.getResourceCount() << " resources" << '\n';
-
-    std::cout << "Saving pack file..." << '\n';
-    if (!pack.savePack(outputFile)) {
-        std::cerr << "Error: Failed to save pack file" << '\n';
-        return 1;
-    }
-
-    std::filesystem::path packPath(outputFile);
-    auto fileSize = std::filesystem::file_size(packPath);
-
-    std::cout << "Pack file created successfully!" << '\n';
-    std::cout << "File size: " << (fileSize / 1024.0 / 1024.0) << " MB" << '\n';
-
+    auto file_size = std::filesystem::file_size(std::filesystem::path(output_file));
+    std::cout << "Pack file created: " << output_file << " ("
+              << (static_cast<double>(file_size) / 1024.0 / 1024.0) << " MB)\n";
     return 0;
 }