diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..43506da
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,48 @@
+# Node.js
+node_modules/
+npm-debug.log
+yarn-debug.log
+yarn-error.log
+
+# Nix
+result/
+*.drv
+*.out
+*.gcno
+.nix-gc*
+.nix-channels
+.nix-defexpr
+.nix-profile
+.nix-store
+
+# VS Code
+.vscode/
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Python (if any)
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+
+# Misc
+*.swp
+*.swo
+*~
+
+# Build
+/dist/
+/build/
+
+# Environment
+.env
+.env.*
+
+# Jupyter
+.ipynb_checkpoints/
+
+# Local flake lock
+flake.lock
diff --git a/pensum/HTML-CSS/HTML-CSS.md b/pensum/HTML-CSS/HTML-CSS.md
new file mode 100644
index 0000000..e69de29