I'm trying to create a responsive form for my website with the help of crispy forms.I'm not using bootstrap and I want to add custom CSS to the crispy form to match my whole website.

HTML:

```
<form method='POST' action=''>{% csrf_token %}

            {{ form|crispy }}

                    <input type='submit' value='Sign Up' />

            </form>

```

using inspect element it shows:

```
            <form method='POST' action=''><input type='hidden' name='csrfmiddlewaretoken' value='GLJMxnnDz1MGNFC46pjoofSlo6JMCD1IXu7X3n7LsRbQfdS38SYHJMs9IAXddcck' />

<div id="div_id_full_name" class="form-group"> <label for="id_full_name" class="control-label ">
                Full name
            </label> <div class="controls "> <input class="textinput textInput form-control" id="id_full_name" maxlength="120" name="full_name" type="text" /> </div> </div> <div id="div_id_email" class="form-group"> <label for="id_email" class="control-label  requiredField">
                Email<span class="asteriskField">*</span> </label> <div class="controls "> <input class="emailinput form-control" id="id_email" maxlength="254" name="email" type="email" required /> </div> </div>

        <!--    <input class='btn btn-primary' type='submit' value='Sign Up' />-->
                        <input type='submit' value='Sign Up' />

            </form>

```

forms.py:

```
from django import forms

from .models import SignUp

class ContactForm(forms.Form):
    full_name = forms.CharField(required=False)
    email = forms.EmailField()
    message = forms.CharField()

class SignUpForm(forms.ModelForm):
    class Meta:
        model = SignUp
        fields = ['full_name', 'email']

```

models.py:

```
from __future__ import unicode_literals

# Create your models here.
from django.db import models

# Create your models here.
class SignUp(models.Model):
    email = models.EmailField()
    full_name = models.CharField(max_length=120, blank=True, null=True)
    timestamp = models.DateTimeField(auto_now_add=True, auto_now=False)
    updated = models.DateTimeField(auto_now_add=False, auto_now=True)

    def __unicode__(self): #Python 3.3 is __str__
        return self.email

```