Initial commit

This commit is contained in:
Pat McNeely
2026-03-20 15:09:41 -04:00
commit d1f7052a58
36 changed files with 3974 additions and 0 deletions

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backend/api/__init__.py Normal file
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"""
Management command to create the OAuth2 Application record and a demo user.
Usage:
python manage.py setup_oauth
"""
from django.core.management.base import BaseCommand
from django.contrib.auth import get_user_model
from oauth2_provider.models import Application
User = get_user_model()
CLIENT_ID = 'react-oauth-client'
REDIRECT_URI = 'http://localhost:5173/callback'
class Command(BaseCommand):
help = 'Create the OAuth2 Application and a demo superuser'
def handle(self, *args, **kwargs):
# ── Demo user ──────────────────────────────────────────────────────────
user, user_created = User.objects.get_or_create(
username='admin',
defaults={
'email': 'admin@example.com',
'is_staff': True,
'is_superuser': True,
},
)
if user_created:
user.set_password('admin123')
user.save()
self.stdout.write(self.style.SUCCESS('Created superuser: admin / admin123'))
else:
self.stdout.write('Superuser "admin" already exists — skipping.')
# ── OAuth2 Application ─────────────────────────────────────────────────
app, app_created = Application.objects.get_or_create(
client_id=CLIENT_ID,
defaults={
'name': 'React Frontend',
'user': user,
'client_type': Application.CLIENT_PUBLIC,
'authorization_grant_type': Application.GRANT_AUTHORIZATION_CODE,
'redirect_uris': REDIRECT_URI,
'skip_authorization': False,
},
)
if not app_created:
# Ensure redirect URI is current if re-running
if REDIRECT_URI not in app.redirect_uris.split():
app.redirect_uris = REDIRECT_URI
app.save()
self.stdout.write('OAuth2 Application already exists — skipping.')
else:
self.stdout.write(self.style.SUCCESS(f'Created OAuth2 Application: {app.name}'))
self.stdout.write('')
self.stdout.write(self.style.SUCCESS('── OAuth2 Application Details ──'))
self.stdout.write(f' Client ID : {app.client_id}')
self.stdout.write(f' Redirect URI : {app.redirect_uris}')
self.stdout.write(f' Grant type : {app.authorization_grant_type}')
self.stdout.write(f' PKCE required: True (enforced in settings)')

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# Generated by Django 4.2.11 on 2026-03-17 19:10
from django.conf import settings
from django.db import migrations, models
import django.db.models.deletion
class Migration(migrations.Migration):
initial = True
dependencies = [
migrations.swappable_dependency(settings.AUTH_USER_MODEL),
]
operations = [
migrations.CreateModel(
name='WebAuthnCredential',
fields=[
('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('credential_id', models.TextField(unique=True)),
('public_key', models.BinaryField()),
('sign_count', models.PositiveIntegerField(default=0)),
('created_at', models.DateTimeField(auto_now_add=True)),
('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='webauthn_credentials', to=settings.AUTH_USER_MODEL)),
],
),
migrations.CreateModel(
name='WebAuthnChallenge',
fields=[
('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('challenge', models.TextField()),
('created_at', models.DateTimeField(auto_now_add=True)),
('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='webauthn_challenges', to=settings.AUTH_USER_MODEL)),
],
options={
'indexes': [models.Index(fields=['user', 'created_at'], name='api_webauth_user_id_ed8a52_idx')],
},
),
]

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backend/api/models.py Normal file
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from django.db import models
from django.conf import settings
class WebAuthnCredential(models.Model):
"""Stores a registered WebAuthn (passkey/biometric) credential for a user."""
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='webauthn_credentials')
credential_id = models.TextField(unique=True) # base64url-encoded
public_key = models.BinaryField() # COSE-encoded public key bytes
sign_count = models.PositiveIntegerField(default=0)
created_at = models.DateTimeField(auto_now_add=True)
def __str__(self):
return f"WebAuthnCredential(user={self.user.username})"
class WebAuthnChallenge(models.Model):
"""Temporary storage for a pending WebAuthn challenge (expires after use)."""
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='webauthn_challenges')
challenge = models.TextField() # base64url-encoded random bytes
created_at = models.DateTimeField(auto_now_add=True)
class Meta:
indexes = [models.Index(fields=['user', 'created_at'])]

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backend/api/urls.py Normal file
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from django.urls import path
from .views import (
LoginView, MeView, PingView,
WebAuthnRegisterBeginView, WebAuthnRegisterCompleteView,
WebAuthnAuthBeginView, WebAuthnAuthCompleteView,
)
urlpatterns = [
path('login/', LoginView.as_view(), name='login'),
path('me/', MeView.as_view(), name='me'),
path('ping/', PingView.as_view(), name='ping'),
# WebAuthn (Touch ID) — registration (requires OAuth token)
path('webauthn/register/begin/', WebAuthnRegisterBeginView.as_view(), name='webauthn-register-begin'),
path('webauthn/register/complete/', WebAuthnRegisterCompleteView.as_view(), name='webauthn-register-complete'),
# WebAuthn (Touch ID) — authentication (public)
path('webauthn/auth/begin/', WebAuthnAuthBeginView.as_view(), name='webauthn-auth-begin'),
path('webauthn/auth/complete/', WebAuthnAuthCompleteView.as_view(), name='webauthn-auth-complete'),
]

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backend/api/views.py Normal file
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import json
from datetime import timedelta
from django.conf import settings
from django.contrib.auth import authenticate, get_user_model
from django.utils import timezone
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework.permissions import IsAuthenticated
from rest_framework import status
from oauth2_provider.contrib.rest_framework import TokenHasReadWriteScope
import webauthn
from webauthn.helpers.structs import (
AuthenticatorSelectionCriteria,
UserVerificationRequirement,
PublicKeyCredentialDescriptor,
RegistrationCredential,
AuthenticatorAttestationResponse,
AuthenticationCredential,
AuthenticatorAssertionResponse,
)
from webauthn.helpers import bytes_to_base64url, base64url_to_bytes
from webauthn.helpers.exceptions import InvalidCBORData, InvalidAuthenticatorDataStructure
from .models import WebAuthnCredential, WebAuthnChallenge
User = get_user_model()
RP_NAME = "OAuth2 Demo"
CHALLENGE_TTL = timedelta(minutes=5)
def _rp_id():
return settings.WEBAUTHN_RP_ID
def _origin():
return settings.WEBAUTHN_ORIGIN
class MeView(APIView):
"""Return the authenticated user's profile."""
permission_classes = [IsAuthenticated, TokenHasReadWriteScope]
required_scopes = ['read']
def get(self, request):
user = request.user
return Response({
'id': user.id,
'username': user.username,
'email': user.email,
'first_name': user.first_name,
'last_name': user.last_name,
'date_joined': user.date_joined.isoformat(),
'has_touch_id': user.webauthn_credentials.exists(),
})
class LoginView(APIView):
"""Validate username/password credentials (no session or token issued)."""
permission_classes = []
authentication_classes = []
def post(self, request):
username = request.data.get('username', '').strip()
password = request.data.get('password', '')
if not username or not password:
return Response({'detail': 'Username and password required.'}, status=status.HTTP_400_BAD_REQUEST)
user = authenticate(request, username=username, password=password)
if user is None:
return Response({'detail': 'Invalid credentials.'}, status=status.HTTP_401_UNAUTHORIZED)
return Response({'username': user.username}, status=status.HTTP_200_OK)
class PingView(APIView):
"""Health check — no auth required."""
permission_classes = []
authentication_classes = []
def get(self, request):
return Response({'status': 'ok'})
# ── WebAuthn Registration ───────────────────────────────────────────────────
class WebAuthnRegisterBeginView(APIView):
"""Begin WebAuthn credential registration (requires existing OAuth token)."""
permission_classes = [IsAuthenticated, TokenHasReadWriteScope]
required_scopes = ['read']
def post(self, request):
user = request.user
# Remove stale challenges for this user
WebAuthnChallenge.objects.filter(user=user).delete()
existing_creds = WebAuthnCredential.objects.filter(user=user)
options = webauthn.generate_registration_options(
rp_id=_rp_id(),
rp_name=RP_NAME,
user_id=str(user.pk).encode(),
user_name=user.username,
user_display_name=user.get_full_name() or user.username,
authenticator_selection=AuthenticatorSelectionCriteria(
user_verification=UserVerificationRequirement.REQUIRED,
),
exclude_credentials=[
PublicKeyCredentialDescriptor(id=base64url_to_bytes(c.credential_id))
for c in existing_creds
],
)
WebAuthnChallenge.objects.create(
user=user,
challenge=bytes_to_base64url(options.challenge),
)
return Response(json.loads(webauthn.options_to_json(options)))
class WebAuthnRegisterCompleteView(APIView):
"""Complete WebAuthn credential registration."""
permission_classes = [IsAuthenticated, TokenHasReadWriteScope]
required_scopes = ['read']
def post(self, request):
user = request.user
try:
challenge_obj = WebAuthnChallenge.objects.filter(user=user).latest('created_at')
except WebAuthnChallenge.DoesNotExist:
return Response({'detail': 'No pending challenge. Begin registration first.'}, status=status.HTTP_400_BAD_REQUEST)
if timezone.now() - challenge_obj.created_at > CHALLENGE_TTL:
challenge_obj.delete()
return Response({'detail': 'Challenge expired. Please try again.'}, status=status.HTTP_400_BAD_REQUEST)
data = request.data
try:
credential = RegistrationCredential(
id=data['id'],
raw_id=base64url_to_bytes(data['rawId']),
response=AuthenticatorAttestationResponse(
client_data_json=base64url_to_bytes(data['response']['clientDataJSON']),
attestation_object=base64url_to_bytes(data['response']['attestationObject']),
),
type=data['type'],
)
verified = webauthn.verify_registration_response(
credential=credential,
expected_challenge=base64url_to_bytes(challenge_obj.challenge),
expected_rp_id=_rp_id(),
expected_origin=_origin(),
require_user_verification=True,
)
except (KeyError, ValueError, InvalidCBORData, InvalidAuthenticatorDataStructure, Exception) as exc:
return Response({'detail': f'Verification failed: {exc}'}, status=status.HTTP_400_BAD_REQUEST)
finally:
challenge_obj.delete()
WebAuthnCredential.objects.update_or_create(
credential_id=bytes_to_base64url(verified.credential_id),
defaults={
'user': user,
'public_key': verified.credential_public_key,
'sign_count': verified.sign_count,
},
)
return Response({'detail': 'Touch ID registered successfully.'})
# ── WebAuthn Authentication ─────────────────────────────────────────────────
class WebAuthnAuthBeginView(APIView):
"""Begin WebAuthn authentication (no existing token required)."""
permission_classes = []
authentication_classes = []
def post(self, request):
username = request.data.get('username', '').strip()
if not username:
return Response({'detail': 'Username required.'}, status=status.HTTP_400_BAD_REQUEST)
try:
user = User.objects.get(username=username)
except User.DoesNotExist:
return Response({'detail': 'No Touch ID registered for this account.'}, status=status.HTTP_404_NOT_FOUND)
credentials = WebAuthnCredential.objects.filter(user=user)
if not credentials.exists():
return Response({'detail': 'No Touch ID registered for this account.'}, status=status.HTTP_404_NOT_FOUND)
# Remove stale challenges
WebAuthnChallenge.objects.filter(user=user).delete()
options = webauthn.generate_authentication_options(
rp_id=_rp_id(),
allow_credentials=[
PublicKeyCredentialDescriptor(id=base64url_to_bytes(c.credential_id))
for c in credentials
],
user_verification=UserVerificationRequirement.REQUIRED,
)
WebAuthnChallenge.objects.create(
user=user,
challenge=bytes_to_base64url(options.challenge),
)
return Response(json.loads(webauthn.options_to_json(options)))
class WebAuthnAuthCompleteView(APIView):
"""Complete WebAuthn authentication — returns username on success (same as /api/login/)."""
permission_classes = []
authentication_classes = []
def post(self, request):
username = request.data.get('username', '').strip()
if not username:
return Response({'detail': 'Username required.'}, status=status.HTTP_400_BAD_REQUEST)
try:
user = User.objects.get(username=username)
except User.DoesNotExist:
return Response({'detail': 'User not found.'}, status=status.HTTP_404_NOT_FOUND)
try:
challenge_obj = WebAuthnChallenge.objects.filter(user=user).latest('created_at')
except WebAuthnChallenge.DoesNotExist:
return Response({'detail': 'No pending challenge. Begin authentication first.'}, status=status.HTTP_400_BAD_REQUEST)
if timezone.now() - challenge_obj.created_at > CHALLENGE_TTL:
challenge_obj.delete()
return Response({'detail': 'Challenge expired. Please try again.'}, status=status.HTTP_400_BAD_REQUEST)
data = request.data
credential_id = data.get('id')
try:
stored_cred = WebAuthnCredential.objects.get(credential_id=credential_id, user=user)
except WebAuthnCredential.DoesNotExist:
return Response({'detail': 'Credential not found.'}, status=status.HTTP_400_BAD_REQUEST)
try:
credential = AuthenticationCredential(
id=data['id'],
raw_id=base64url_to_bytes(data['rawId']),
response=AuthenticatorAssertionResponse(
client_data_json=base64url_to_bytes(data['response']['clientDataJSON']),
authenticator_data=base64url_to_bytes(data['response']['authenticatorData']),
signature=base64url_to_bytes(data['response']['signature']),
user_handle=base64url_to_bytes(data['response']['userHandle']) if data['response'].get('userHandle') else None,
),
type=data['type'],
)
verified = webauthn.verify_authentication_response(
credential=credential,
expected_challenge=base64url_to_bytes(challenge_obj.challenge),
expected_rp_id=_rp_id(),
expected_origin=_origin(),
credential_public_key=bytes(stored_cred.public_key),
credential_current_sign_count=stored_cred.sign_count,
require_user_verification=True,
)
except Exception as exc:
return Response({'detail': f'Verification failed: {exc}'}, status=status.HTTP_401_UNAUTHORIZED)
finally:
challenge_obj.delete()
# Update replay-attack counter
stored_cred.sign_count = verified.new_sign_count
stored_cred.save(update_fields=['sign_count'])
return Response({'username': user.username}, status=status.HTTP_200_OK)

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backend/config/settings.py Normal file
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import os
from pathlib import Path
from datetime import timedelta
BASE_DIR = Path(__file__).resolve().parent.parent
# Load a .env file if present (development convenience; production uses real env vars)
try:
from dotenv import load_dotenv
load_dotenv(BASE_DIR / '.env')
except ImportError:
pass
# ── Core ───────────────────────────────────────────────────────────────────────
SECRET_KEY = os.environ.get(
'DJANGO_SECRET_KEY',
'django-insecure-dev-secret-key-change-in-production-xyz123',
)
DEBUG = os.environ.get('DJANGO_DEBUG', 'True').lower() in ('true', '1', 'yes')
ALLOWED_HOSTS = [
h.strip()
for h in os.environ.get('DJANGO_ALLOWED_HOSTS', 'localhost,127.0.0.1').split(',')
if h.strip()
]
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'rest_framework',
'oauth2_provider',
'corsheaders',
'api',
]
MIDDLEWARE = [
'corsheaders.middleware.CorsMiddleware',
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'oauth2_provider.middleware.OAuth2TokenMiddleware',
]
ROOT_URLCONF = 'config.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [BASE_DIR / 'templates'],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
WSGI_APPLICATION = 'config.wsgi.application'
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': BASE_DIR / 'db.sqlite3',
}
}
AUTH_PASSWORD_VALIDATORS = [
{'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator'},
{'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator'},
{'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator'},
{'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator'},
]
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_TZ = True
STATIC_URL = 'static/'
STATIC_ROOT = BASE_DIR / 'staticfiles'
DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
# ── Auth redirects ─────────────────────────────────────────────────────────────
LOGIN_URL = '/accounts/login/'
LOGIN_REDIRECT_URL = '/o/authorize/'
LOGOUT_REDIRECT_URL = os.environ.get('LOGOUT_REDIRECT_URL', 'http://localhost:5173/')
# ── Django REST Framework ──────────────────────────────────────────────────────
REST_FRAMEWORK = {
'DEFAULT_AUTHENTICATION_CLASSES': [
'oauth2_provider.contrib.rest_framework.OAuth2Authentication',
],
'DEFAULT_PERMISSION_CLASSES': [
'rest_framework.permissions.IsAuthenticated',
],
}
# ── Django OAuth Toolkit ───────────────────────────────────────────────────────
OAUTH2_PROVIDER = {
'PKCE_REQUIRED': True,
'ACCESS_TOKEN_EXPIRE_SECONDS': 3600,
'REFRESH_TOKEN_EXPIRE_SECONDS': 60 * 60 * 24 * 7,
'ROTATE_REFRESH_TOKEN': True,
'SCOPES': {
'read': 'Read access',
'write': 'Write access',
},
'DEFAULT_SCOPES': ['read'],
'ALLOWED_REDIRECT_URI_SCHEMES': ['http', 'https'],
}
AUTHENTICATION_BACKENDS = [
'oauth2_provider.backends.OAuth2Backend',
'django.contrib.auth.backends.ModelBackend',
]
# ── CORS ───────────────────────────────────────────────────────────────────────
# In production the frontend is co-located (same origin), so CORS isn't needed.
# Keep it configured here so the dev setup (Vite on :5173) still works.
CORS_ALLOWED_ORIGINS = [
o.strip()
for o in os.environ.get(
'CORS_ALLOWED_ORIGINS',
'http://localhost:5173,http://127.0.0.1:5173',
).split(',')
if o.strip()
]
CORS_ALLOW_CREDENTIALS = True
CORS_ALLOW_HEADERS = [
'accept',
'accept-encoding',
'authorization',
'content-type',
'dnt',
'origin',
'user-agent',
'x-csrftoken',
'x-requested-with',
]
# ── WebAuthn / Touch ID ────────────────────────────────────────────────────────
# RP_ID must be the effective domain of the origin (no port, no scheme).
# WEBAUTHN_ORIGIN must be the exact origin browsers will use to reach the app.
WEBAUTHN_RP_ID = os.environ.get('WEBAUTHN_RP_ID', 'localhost')
WEBAUTHN_ORIGIN = os.environ.get('WEBAUTHN_ORIGIN', 'http://localhost:5173')
# ── Production HTTPS hardening ─────────────────────────────────────────────────
# These only activate when DEBUG=False. Assumes nginx terminates TLS and sets
# the X-Forwarded-Proto header before proxying to Gunicorn/Django.
if not DEBUG:
SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')
SECURE_HSTS_SECONDS = 31536000
SECURE_HSTS_INCLUDE_SUBDOMAINS = True
SECURE_HSTS_PRELOAD = True
SESSION_COOKIE_SECURE = True
CSRF_COOKIE_SECURE = True

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from django.contrib import admin
from django.urls import path, include
urlpatterns = [
path('admin/', admin.site.urls),
# Django's built-in login/logout views — DOT redirects here when unauthenticated
path('accounts/', include('django.contrib.auth.urls')),
path('o/', include('oauth2_provider.urls', namespace='oauth2_provider')),
path('api/', include('api.urls')),
]

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import os
from django.core.wsgi import get_wsgi_application
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'config.settings')
application = get_wsgi_application()

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#!/usr/bin/env python
import os
import sys
def main():
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'config.settings')
try:
from django.core.management import execute_from_command_line
except ImportError as exc:
raise ImportError(
"Couldn't import Django. Are you sure it's installed and "
"available on your PYTHONPATH environment variable? Did you "
"forget to activate a virtual environment?"
) from exc
execute_from_command_line(sys.argv)
if __name__ == '__main__':
main()

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Django==4.2.11
djangorestframework==3.15.1
django-oauth-toolkit==2.4.0
django-cors-headers==4.3.1
webauthn>=2.0.0
python-dotenv>=1.0.0

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>{% block title %}OAuth2 Demo{% endblock %}</title>
<style>
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
background: #f0f2f5;
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
padding: 1rem;
}
.block-center {
background: #fff;
border-radius: 16px;
box-shadow: 0 4px 32px rgba(0,0,0,.1);
padding: 3rem 2.5rem;
width: 100%;
max-width: 420px;
}
.block-center-heading {
font-size: 1.4rem;
font-weight: 700;
color: #1a1a2e;
margin-bottom: 1rem;
text-align: center;
}
p { color: #6b7280; font-size: .95rem; margin-bottom: .75rem; }
ul {
list-style: none;
margin-bottom: 1.5rem;
}
ul li {
padding: .5rem .75rem;
background: #f9fafb;
border: 1px solid #e5e7eb;
border-radius: 6px;
margin-bottom: .375rem;
font-size: .9rem;
color: #374151;
}
ul li::before { content: "✓ "; color: #4f46e5; font-weight: 700; }
.controls {
display: flex;
gap: .75rem;
margin-top: 1.25rem;
}
.btn {
flex: 1;
padding: .75rem;
border-radius: 8px;
font-size: 1rem;
font-weight: 600;
cursor: pointer;
border: 1px solid #d1d5db;
background: #fff;
color: #374151;
transition: background .15s;
}
.btn:hover { background: #f9fafb; }
.btn-primary {
background: #4f46e5;
border-color: #4f46e5;
color: #fff;
}
.btn-primary:hover { background: #4338ca; border-color: #4338ca; }
.errorlist {
background: #fef2f2;
border: 1px solid #fecaca;
color: #dc2626;
border-radius: 8px;
padding: .75rem 1rem;
margin-bottom: 1rem;
font-size: .875rem;
list-style: none;
}
h2 { color: #dc2626; margin-bottom: .5rem; }
</style>
</head>
<body>
{% block content %}{% endblock %}
</body>
</html>

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Sign in OAuth2 Demo</title>
<style>
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
background: #f0f2f5;
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
}
.card {
background: #fff;
border-radius: 16px;
box-shadow: 0 4px 32px rgba(0,0,0,.1);
padding: 3rem 2.5rem;
width: 100%;
max-width: 400px;
text-align: center;
}
.logo { font-size: 3rem; margin-bottom: 1rem; }
h1 {
font-size: 1.75rem;
font-weight: 700;
color: #1a1a2e;
margin-bottom: .5rem;
}
.subtitle {
color: #6b7280;
font-size: .95rem;
margin-bottom: 2rem;
}
.errors {
background: #fef2f2;
border: 1px solid #fecaca;
color: #dc2626;
border-radius: 8px;
padding: .75rem 1rem;
margin-bottom: 1.25rem;
font-size: .875rem;
text-align: left;
}
.field { margin-bottom: 1rem; text-align: left; }
label {
display: block;
font-size: .875rem;
font-weight: 500;
color: #374151;
margin-bottom: .375rem;
}
input[type="text"],
input[type="password"] {
width: 100%;
padding: .65rem .875rem;
border: 1px solid #d1d5db;
border-radius: 8px;
font-size: 1rem;
color: #1a1a2e;
outline: none;
transition: border-color .15s;
}
input:focus { border-color: #4f46e5; box-shadow: 0 0 0 3px rgba(79,70,229,.15); }
button[type="submit"] {
width: 100%;
padding: .85rem;
background: #4f46e5;
color: #fff;
font-size: 1rem;
font-weight: 600;
border: none;
border-radius: 8px;
cursor: pointer;
margin-top: .5rem;
transition: background .2s;
}
button[type="submit"]:hover { background: #4338ca; }
.hint { margin-top: 1.5rem; font-size: .85rem; color: #9ca3af; }
.hint strong { color: #6b7280; }
</style>
</head>
<body>
<div class="card">
<div class="logo">🔐</div>
<h1>Sign in</h1>
<p class="subtitle">Enter your credentials to authorise the application</p>
{% if form.errors %}
<div class="errors">
Invalid username or password. Please try again.
</div>
{% endif %}
<form method="post">
{% csrf_token %}
<input type="hidden" name="next" value="{{ next }}" />
<div class="field">
<label for="id_username">Username</label>
<input type="text" id="id_username" name="username"
autofocus autocomplete="username" required />
</div>
<div class="field">
<label for="id_password">Password</label>
<input type="password" id="id_password" name="password"
autocomplete="current-password" required />
</div>
<button type="submit">Sign in</button>
</form>
<p class="hint">Demo: <strong>admin</strong> / <strong>admin123</strong></p>
</div>
</body>
</html>