diff --git a/Dockerfile b/Dockerfile
index 0e68381..bc3dbe6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,10 +2,9 @@ ARG PYTHON_VERSION=3.10
 FROM python:$PYTHON_VERSION-slim
 
 ARG USER=pydfy-user
-ENTRYPOINT ["poetry", "run", "python"]
 
 RUN apt-get update && apt-get install -y chromium chromium-driver curl
-RUN curl -sLO https://github.com/tailwindlabs/tailwindcss/releases/latest/download/tailwindcss-linux-x64 && \
+RUN curl -sLO https://github.com/tailwindlabs/tailwindcss/releases/download/v3.4.3/tailwindcss-linux-x64 && \
     chmod +x tailwindcss-linux-x64 && \
     mv tailwindcss-linux-x64 /usr/local/bin/tailwindcss
 RUN groupadd --gid 1000 $USER && adduser --disabled-password --gecos '' --uid 1000 --gid 1000 $USER
@@ -16,7 +15,7 @@ ENV PATH="/home/$USER/.local/bin:/home/$USER/pydfy/.venv/bin:${PATH}" \
     PYTHONUNBUFFERED=1 \
     POETRY_NO_INTERACTION=1 \
     POETRY_VIRTUALENVS_IN_PROJECT=true\
-    PYDFY_BUILD_DIR=/data
+    PYDFY_OUT=/dev/stdout
 
 RUN --mount=type=cache,target=/root/.cache pip install --user poetry==1.4.2
 
@@ -25,3 +24,7 @@ RUN --mount=type=cache,target=/root/.cache poetry install --with dev --all-extra
 
 COPY --chown=$USER:$USER ./ ./
 RUN --mount=type=cache,target=/root/.cache poetry install --with dev --all-extras
+
+WORKDIR /pydfy
+ENTRYPOINT ["python"]
+CMD ["main.py"]
diff --git a/README.md b/README.md
index 6a2080d..04c161e 100644
--- a/README.md
+++ b/README.md
@@ -89,9 +89,9 @@ pdf.render(out="report.pdf", build_dir="/build")
 # Save everything in the /data directory
 pdf.render(out="/data/report.pdf", build_dir="/data")
 
-# Equivalent to the previous line
-os.environ["PYDFY_BUILD_DIR"] = "/data"
-pdf.render(out="/data/report.pdf")
+# Only save the pdf in the /data directory
+os.environ["PYDFY_OUT"] = "/data/report.pdf"
+pdf.render()
 ```
 
 ### Custom Components
@@ -133,9 +133,14 @@ You can add custom CSS to the compilation step:
 pdf.render(css="blue.css")
 ```
 
-Content of `my.css`, where the path should point to your pydfy install:
+Content of `my.css`, where we need to copy the contents of `base.css` first:
 ```css
-@import "../../pydfy/template/src/base.css";
+/* Tailwind setup */
+@tailwind base;  @tailwind components; @tailwind utilities;
+@media print { body { -webkit-print-color-adjust: exact; } }
+@media print {  html, body { width: 210mm; height: 297mm; font-size: 8pt; } }
+@media print { thead {display: table-row-group;} }
+@page { size: A4; margin: 1cm; }
 
 .pf-number-content {
     color: blue;
@@ -151,7 +156,7 @@ You could use Docker in the development process as follows:
 ```shell
 docker build -t pydfy .
 cd examples/iris
-docker run -v $PWD/:/data pydfy /data/main.py  # The docker image is configured with PYDFY_BUILD_DIR=/data
+docker run -v $PWD:/pydfy pydfy > out.pdf  # The docker image is configured to run main.py and write to stdout
 ```
 
 ## Contributing
diff --git a/examples/custom/out.pdf b/examples/custom/out.pdf
index 269d57a..bb4f7af 100644
Binary files a/examples/custom/out.pdf and b/examples/custom/out.pdf differ
diff --git a/examples/iris/blue.css b/examples/iris/blue.css
index 50495ff..cace9c6 100644
--- a/examples/iris/blue.css
+++ b/examples/iris/blue.css
@@ -1,4 +1,8 @@
-@import "../../pydfy/template/src/base.css";
+@tailwind base;  @tailwind components; @tailwind utilities;
+@media print { body { -webkit-print-color-adjust: exact; } }
+@media print {  html, body { width: 210mm; height: 297mm; font-size: 8pt; } }
+@media print { thead {display: table-row-group;} }
+@page { size: A4; margin: 1cm; }
 
 .pf-number-content {
     color: blue;
diff --git a/examples/iris/main.py b/examples/iris/main.py
index e4f0da9..cae4232 100644
--- a/examples/iris/main.py
+++ b/examples/iris/main.py
@@ -22,7 +22,7 @@ def main():
 
     pf.PDF(
         [
-            pf.Title("My Beautiful Report with a very long title that I'd really like to keep", col_span=2),
+            pf.Title("My Report Title Spanning Multiple Columns", col_span=2),
             pf.Image(Path(__file__).parent / "logo.png"),
         ],
         pf.Section("Documentation"),
diff --git a/examples/iris/out.pdf b/examples/iris/out.pdf
index 95b985b..a3f8587 100644
Binary files a/examples/iris/out.pdf and b/examples/iris/out.pdf differ
diff --git a/pydfy/renderer.py b/pydfy/renderer.py
index ee22300..579351e 100644
--- a/pydfy/renderer.py
+++ b/pydfy/renderer.py
@@ -26,7 +26,7 @@ def render(
         build_dir.mkdir(exist_ok=True, parents=True)
 
     if not out:
-        out = Path(os.getenv("PYDFY_BUILD_DIR", ".")) / Path("out.pdf")
+        out = Path(os.getenv("PYDFY_OUT", "./out.pdf"))
 
     out = Path(out)
 
@@ -61,21 +61,20 @@ def _render_template(template_file: Path, out: Path, pdf_arguments: _PDF) -> Non
 
 
 def _compile_css(build_dir: Path, css: Path | str | None) -> None:
-    base = str(BASE_DIR / "pydfy" / "template" / "src" / "base.css")
-    out = str(build_dir / "out.css")
+    base = str((BASE_DIR / "pydfy" / "template" / "src" / "base.css").absolute())
+    out = str((build_dir / "out.css").absolute())
 
-    args = [
+    tailwind_args = [
         "tailwindcss",
         "-i",
         base if not css else str(Path(css)),
         "-o",
         out,
         "--content",
-        str(relative_to(build_dir, Path().absolute())) + "/*.html",
+        str(build_dir.absolute()) + "/*.html",
     ]
-    # if css:
 
-    subprocess.run(args, capture_output=True)
+    subprocess.run(tailwind_args, capture_output=True)
 
 
 def _print_to_pdf(rendered_template_file: Path, output_path: Path) -> None:
diff --git a/pydfy/template/src/base.css b/pydfy/template/src/base.css
index b60e30b..7604a63 100644
--- a/pydfy/template/src/base.css
+++ b/pydfy/template/src/base.css
@@ -1,21 +1,5 @@
-@tailwind base;
-@tailwind components;
-@tailwind utilities;
-
+@tailwind base;  @tailwind components; @tailwind utilities;
 @media print { body { -webkit-print-color-adjust: exact; } }
-
-@page {
-    size: A4;
-    margin: 1cm;
-}
-@media print {
-    html, body {
-        width: 210mm;
-        height: 297mm;
-        font-size: 8pt;
-    }
-}
-
-@media print {
-    thead {display: table-row-group;}
-}
+@media print {  html, body { width: 210mm; height: 297mm; font-size: 8pt; } }
+@media print { thead {display: table-row-group;} }
+@page { size: A4; margin: 1cm; }