calender media css

app/vkk/templates/vkk/workhours/contributor/calendar.html

 {% load i18n l10n %}
+{{ form.media }}
 {{ form.non_field_errors }}
 <div class="calendar">
     {% for month in fields_more %}

app/vkk/templates/vkk/workhours/contributor/workhours.html

 {% extends 'base.html' %}
 {% load i18n customtags static %}
-{% block head_extra %}<link rel="stylesheet" type="text/css" href="{% static 'styles/calendar.css' %}">{% endblock head_extra %}
 {% block title %}{% translate "Workhours" %}{% endblock title %}
 {% block main %}
     <h1>{% blocktranslate with name=project.name number=project.invoice_number %}Project: {{ name }} (Invoice number: {{ number }})</h1>{% endblocktranslate %}

app/vkk/workhours/contributor/forms.py

@@ -6,6 +6,9 @@ from vkk.workhours.forms import date_iterator
 # Forms
 
 class WorkhourCalendarForm(forms.Form):
+    class Media:
+        css = { 'all': ('styles/calendar.css',) }
+
     template_name_calendar = 'vkk/workhours/contributor/calendar.html'
 
     def __init__(self, *args, period_pk=None, assignment_pk=None, **kwargs):