Nested panels #63
Description
Is your feature request related to a problem? Please describe.
I'm trying to migrate a website to sphinx and sphinx-panels has been incredible helpful so far to create the bootstrap layouts we have previously written directly in HTML/CSS. Now I'm trying to nest columns inside a grid layout as described in the bootstrap documentation here, but without success to far. Nested panels are not described in the sphinx-panels documentation, therefore this seems more like a feature request than an actual bug report to me.
The following myst markdown
````{panels}
:column: col-lg-12
```{panels}
First
---
Second
```
---
```{panels}
Third
---
Forth
```
````
Currently yields separate and ill-formatted columns:
Describe the solution you'd like
Eventually, I want to produce a layout like this, using two columns and cards with headers inside the columns for the individual entries:
Using nested panels seems like the easiest way to make this work.
Describe alternatives you've considered
Trying to build the layout myself using the .. div:: directives, but this would be the last resort.
Additional context
Conda environment used (sorry for the pip/conda-forge mix):
conda list
_libgcc_mutex 0.1 conda_forge conda-forge
_openmp_mutex 4.5 1_gnu conda-forge
ablog 0.10.13 pypi_0 pypi
alabaster 0.7.12 py_0 conda-forge
attrs 20.3.0 pypi_0 pypi
babel 2.9.0 pyhd3deb0d_0 conda-forge
beautifulsoup4 4.9.3 pyhb0f4dca_0 conda-forge
brotlipy 0.7.0 py39h3811e60_1001 conda-forge
ca-certificates 2020.12.5 ha878542_0 conda-forge
certifi 2020.12.5 py39hf3d152e_1 conda-forge
cffi 1.14.5 py39he32792d_0 conda-forge
chardet 4.0.0 py39hf3d152e_1 conda-forge
click 7.1.2 pyh9f0ad1d_0 conda-forge
colorama 0.4.4 pyh9f0ad1d_0 conda-forge
cryptography 3.4.4 py39h95dcef6_0 conda-forge
docutils 0.16 py39hf3d152e_3 conda-forge
feedgen 0.9.0 pypi_0 pypi
idna 2.10 pyh9f0ad1d_0 conda-forge
imagesize 1.2.0 py_0 conda-forge
invoke 1.5.0 pypi_0 pypi
jinja2 2.11.3 pyh44b312d_0 conda-forge
latexcodec 2.0.1 pypi_0 pypi
ld_impl_linux-64 2.35.1 hea4e1c9_2 conda-forge
libffi 3.3 h58526e2_2 conda-forge
libgcc-ng 9.3.0 h2828fa1_18 conda-forge
libgomp 9.3.0 h2828fa1_18 conda-forge
libstdcxx-ng 9.3.0 h6de172a_18 conda-forge
lxml 4.6.2 pypi_0 pypi
markdown-it-py 0.6.2 pypi_0 pypi
markupsafe 1.1.1 py39h3811e60_3 conda-forge
mdit-py-plugins 0.2.5 pypi_0 pypi
myst-parser 0.13.5 pypi_0 pypi
ncurses 6.2 h58526e2_4 conda-forge
openssl 1.1.1k h7f98852_0 conda-forge
packaging 20.9 pyh44b312d_0 conda-forge
pip 21.0.1 pyhd8ed1ab_0 conda-forge
pybtex 0.24.0 pypi_0 pypi
pybtex-docutils 1.0.0 pypi_0 pypi
pycparser 2.20 pyh9f0ad1d_2 conda-forge
pydata-sphinx-theme 0.6.3 pypi_0 pypi
pygments 2.8.0 pyhd8ed1ab_0 conda-forge
pyopenssl 20.0.1 pyhd8ed1ab_0 conda-forge
pyparsing 2.4.7 pyh9f0ad1d_0 conda-forge
pysocks 1.7.1 py39hf3d152e_3 conda-forge
python 3.9.2 hffdb5ce_0_cpython conda-forge
python-dateutil 2.8.1 pypi_0 pypi
python_abi 3.9 1_cp39 conda-forge
pytz 2021.1 pyhd8ed1ab_0 conda-forge
pyyaml 5.4.1 pypi_0 pypi
readline 8.0 he28a2e2_2 conda-forge
requests 2.25.1 pyhd3deb0d_0 conda-forge
setuptools 49.6.0 py39hf3d152e_3 conda-forge
six 1.15.0 pyh9f0ad1d_0 conda-forge
snowballstemmer 2.1.0 pyhd8ed1ab_0 conda-forge
soupsieve 2.2 pypi_0 pypi
sphinx 3.5.1 pyhd8ed1ab_0 conda-forge
sphinx-book-theme 0.1.0 pypi_0 pypi
sphinx-copybutton 0.3.1 pypi_0 pypi
sphinx-panels 0.5.2 pypi_0 pypi
sphinx-togglebutton 0.2.3 pypi_0 pypi
sphinx_rtd_theme 0.5.1 pyhd3deb0d_0 conda-forge
sphinxcontrib-applehelp 1.0.2 py_0 conda-forge
sphinxcontrib-bibtex 2.2.0 pypi_0 pypi
sphinxcontrib-devhelp 1.0.2 py_0 conda-forge
sphinxcontrib-htmlhelp 1.0.3 py_0 conda-forge
sphinxcontrib-jsmath 1.0.1 py_0 conda-forge
sphinxcontrib-qthelp 1.0.3 py_0 conda-forge
sphinxcontrib-serializinghtml 1.1.4 py_0 conda-forge
sqlite 3.34.0 h74cdb3f_0 conda-forge
tk 8.6.10 hed695b0_1 conda-forge
tzdata 2021a he74cb21_0 conda-forge
urllib3 1.26.3 pyhd8ed1ab_0 conda-forge
watchdog 2.0.2 pypi_0 pypi
wheel 0.36.2 pyhd3deb0d_0 conda-forge
xz 5.2.5 h516909a_1 conda-forge
yaml 0.2.5 h516909a_0 conda-forge
zlib 1.2.11 h516909a_1010 conda-forge