diff --git a/rendercv/__main__.py b/rendercv/__main__.py
index 6f4e9f9..9f34256 100644
--- a/rendercv/__main__.py
+++ b/rendercv/__main__.py
@@ -29,9 +29,7 @@ def main(args=sys.argv[1:]):
     file_path = os.path.join(os.getcwd(), input_file_path)
     data = read_input_file(file_path)
     output_latex_file = render_template(data)
-    output_pdf_file = run_latex(output_latex_file)
-    logger.info(f"RenderCV: PDF file generated at {output_pdf_file}")
-
+    run_latex(output_latex_file)
 
 if __name__ == "__main__":
     main(args=["tests/inputs/personal.yaml"])
diff --git a/rendercv/data_model.py b/rendercv/data_model.py
index 89346fc..d458bb7 100644
--- a/rendercv/data_model.py
+++ b/rendercv/data_model.py
@@ -403,7 +403,7 @@ class ClassicThemeOptions(BaseModel):
 class Design(BaseModel):
     """This class stores the theme name of the CV and the theme's options."""
 
-    theme: Literal["classic", "awesome-cv"] = Field(
+    theme: Literal["classic"] = Field(
         default="classic",
         title="Theme name",
         description='The only option is "Classic" for now.',
@@ -426,12 +426,31 @@ class Design(BaseModel):
         description="The page size of the CV. It can be a4paper or letterpaper.",
         examples=["a4paper", "letterpaper"],
     )
-    options: ClassicThemeOptions = Field(
-        default=ClassicThemeOptions(),
+    options: Optional[ClassicThemeOptions] = Field(
+        default=None,
         title="Theme Options",
         description="The options of the theme.",
     )
 
+    @model_validator(mode="after")
+    @classmethod
+    def check_theme_options(cls, model):
+        if model.options is None:
+            if model.theme == "classic":
+                model.options = ClassicThemeOptions()
+            else:
+                raise RuntimeError("Unknown theme!")
+        else:
+            if model.theme == "classic":
+                if not isinstance(model.options, ClassicThemeOptions):
+                    raise ValueError(
+                        "Theme is classic but options is not classic theme options!"
+                    )
+            else:
+                raise RuntimeError("Theme is neither classic nor awesome-cv!")
+
+        return model
+
     @field_validator("font")
     @classmethod
     def check_font(cls, font: str) -> str:
diff --git a/rendercv/rendering.py b/rendercv/rendering.py
index ead3c5c..d0014c3 100644
--- a/rendercv/rendering.py
+++ b/rendercv/rendering.py
@@ -331,8 +331,8 @@ def render_template(data: RenderCVDataModel, output_path: Optional[str] = None)
     file_name = data.cv.name.replace(" ", "_") + "_CV.tex"
     output_file_path = os.path.join(output_folder, file_name)
     os.makedirs(os.path.dirname(output_file_path), exist_ok=True)
-    with open(output_file_path, "w") as file:
-        file.write(output_latex_file)
+    with open(output_file_path, "wb") as file:
+        file.write(output_latex_file.encode("utf-8"))
 
     # Copy the fonts directory to the output directory:
     # Remove the old fonts directory if it exists:
@@ -347,6 +347,16 @@ def render_template(data: RenderCVDataModel, output_path: Optional[str] = None)
         dirs_exist_ok=True,
     )
 
+    # Copy auxiliary files to the output directory (if there is any):
+    output_directory = os.path.dirname(output_file_path)
+    theme_directory = os.path.join(os.path.dirname(__file__), "templates", theme)
+    for file_name in os.listdir(theme_directory):
+        if file_name.endswith(".cls"):
+            shutil.copy(
+                os.path.join(theme_directory, file_name),
+                output_directory,
+            )
+
     end_time = time.time()
     time_taken = end_time - start_time
     logger.info(