diff --git a/profile/base_html.nbcv b/profile/base_html.nbcv
index 571da49..db1c9d1 100644
--- a/profile/base_html.nbcv
+++ b/profile/base_html.nbcv
@@ -5,4 +5,6 @@ c.ConverterTemplate.extract_figures=False
 c.ConverterTemplate.template_file='basichtml'
 c.ConverterTemplate.tex_environement=False
 
+c.NbconvertApp.fileext='html'
+
 c.ExtractFigureTransformer.enabled = False
diff --git a/profile/full_html.nbcv b/profile/full_html.nbcv
index a07445e..ab3ec71 100644
--- a/profile/full_html.nbcv
+++ b/profile/full_html.nbcv
@@ -5,4 +5,6 @@ c.ConverterTemplate.extract_figures=False
 c.ConverterTemplate.template_file='fullhtml'
 c.ConverterTemplate.tex_environement=False
 
+c.NbconvertApp.fileext='html'
+
 c.ExtractFigureTransformer.enabled = False
diff --git a/profile/latex_base.nbcv b/profile/latex_base.nbcv
index 37fad42..cf41f30 100644
--- a/profile/latex_base.nbcv
+++ b/profile/latex_base.nbcv
@@ -5,6 +5,7 @@ c.ConverterTemplate.template_file='latex_base'
 c.ConverterTemplate.tex_environement=True
 c.ConverterTemplate.display_data_priority=['latex', 'svg', 'png', 'jpg', 'jpeg' , 'text']
 c.ExtractFigureTransformer.display_data_priority=['latex', 'svg', 'png', 'jpg', 'jpeg']
+c.NbconvertApp.fileext='tex'
 
 c.ExtractFigureTransformer.extra_ext_map={'svg':'pdf'}
 c.ExtractFigureTransformer.enabled=True
diff --git a/profile/python.nbcv b/profile/python.nbcv
index c00416c..75d5b2d 100644
--- a/profile/python.nbcv
+++ b/profile/python.nbcv
@@ -3,3 +3,5 @@ c = get_config()
 c.ConverterTemplate.extract_figures=False
 c.ConverterTemplate.template_file='python'
 c.ConverterTemplate.tex_environement=False
+
+c.NbconvertApp.fileext='py'
diff --git a/runme.py b/runme.py
index 6a6c09b..c5d892c 100755
--- a/runme.py
+++ b/runme.py
@@ -38,6 +38,8 @@ class NbconvertApp(Application):
     stdout = Bool(True, config=True)
     write = Bool(False, config=True)
 
+    fileext = Unicode('txt', config=True)
+
     aliases = {
             'stdout':'NbconvertApp.stdout',
             'write':'NbconvertApp.write',
@@ -98,7 +100,7 @@ class NbconvertApp(Application):
 
         keys = resources.keys()
         if self.write :
-            with io.open(os.path.join(out_root+'.'+'ext'),'w') as f:
+            with io.open(os.path.join(out_root+'.'+self.fileext),'w') as f:
                         f.write(output)
         if keys :
             if self.write and not os.path.exists(out_root+'_files'):
diff --git a/templates/basichtml.tpl b/templates/basichtml.tpl
index 693901e..dd86998 100644
--- a/templates/basichtml.tpl
+++ b/templates/basichtml.tpl
@@ -14,13 +14,11 @@
 {% endblock input_group %}
 
 {% block output_group -%}
-<div class="vbox output_wrapper">
+<div class="output_wrapper">
 <div class="output vbox">
-<div class="hbox output_area">
 {{ super() }}
 </div>
 </div>
-</div>
 {% endblock output_group %}
 
 
@@ -30,10 +28,12 @@
 
 {% block output_prompt -%}
 <div class="prompt output_prompt">
+<div class="output vbox">
 {%- if cell.haspyout -%}
 Out[{{cell.prompt_number}}]:
 {%- endif -%}
 </div>
+</div>
 {% endblock output_prompt %}
 
 {% block input %}
@@ -67,21 +67,30 @@ unknown type  {{cell.type}}
 
 
 {% block pyout -%}
-<div class="output_subarea output_pyout">
+<div class="hbox output_area">
+<div class="prompt"></div>
+<div class="box-flex1 output_subarea output_pyout">
 {% block data_priority scoped %}{{ super()}}{% endblock %}
 </div>
+</div>
 {%- endblock pyout %}
 
 {% block stream_stdout -%}
-<div class="output_subarea output_stream output_stdout">
+<div class="hbox output_area">
+<div class="prompt"></div>
+<div class="box-flex1 output_subarea output_stream output_stdout">
 <pre>{{output.text |ansi2html}}</pre>
 </div>
+</div>
 {%- endblock stream_stdout %}
 
 {% block stream_stderr -%}
-<div class="output_subarea output_stream output_stderr">
+<div class="hbox output_area">
+<div class="prompt"></div>
+<div class="box-flex1 output_subarea output_stream output_stderr">
 <pre>{{output.text |ansi2html}}</pre>
 </div>
+</div>
 {%- endblock stream_stderr %}
 
 {% block data_svg -%}
@@ -110,9 +119,12 @@ unknown type  {{cell.type}}
 {%- endblock data_latex %}
 
 {% block pyerr -%}
-<div class="output_subarea output_pyerr">
+<div class="hbox output_area">
+<div class="prompt"></div>
+<div class="box-flex1 output_subarea output_pyerr">
 <pre>{{super()}}</pre>
 </div>
+</div>
 {%- endblock pyerr %}
 
 {%- block traceback_line %}
@@ -126,7 +138,10 @@ unknown type  {{cell.type}}
 
 
 {%- block display_data scoped -%}
-<div class="output_subarea output_display_data">
+<div class="hbox output_area">
+<div class="prompt"></div>
+<div class="box-flex1 output_subarea output_display_data">
 {{super()}}
 </div>
+</div>
 {%- endblock display_data -%}