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Static Files
============
The authentication views and templates work, but they look very plain
right now. Some `CSS`_ can be added to add style to the HTML layout you
constructed. The style won't change, so it's a *static* file rather than
a template.
Flask automatically adds a ``static`` view that takes a path relative
to the ``flaskr/static`` directory and serves it. The ``base.html``
template already has a link to the ``style.css`` file:
.. code-block:: html+jinja
{{ url_for('static', filename='style.css') }}
Besides CSS, other types of static files might be files with JavaScript
functions, or a logo image. They are all placed under the
``flaskr/static`` directory and referenced with
``url_for('static', filename='...')``.
This tutorial isn't focused on how to write CSS, so you can just copy
the following into the ``flaskr/static/style.css`` file:
.. code-block:: css
:caption: ``flaskr/static/style.css``
html { font-family: sans-serif; background: #eee; padding: 1rem; }
body { max-width: 960px; margin: 0 auto; background: white; }
h1 { font-family: serif; color: #377ba8; margin: 1rem 0; }
a { color: #377ba8; }
hr { border: none; border-top: 1px solid lightgray; }
nav { background: lightgray; display: flex; align-items: center; padding: 0 0.5rem; }
nav h1 { flex: auto; margin: 0; }
nav h1 a { text-decoration: none; padding: 0.25rem 0.5rem; }
nav ul { display: flex; list-style: none; margin: 0; padding: 0; }
nav ul li a, nav ul li span, header .action { display: block; padding: 0.5rem; }
.content { padding: 0 1rem 1rem; }
.content > header { border-bottom: 1px solid lightgray; display: flex; align-items: flex-end; }
.content > header h1 { flex: auto; margin: 1rem 0 0.25rem 0; }
.flash { margin: 1em 0; padding: 1em; background: #cae6f6; border: 1px solid #377ba8; }
.post > header { display: flex; align-items: flex-end; font-size: 0.85em; }
.post > header > div:first-of-type { flex: auto; }
.post > header h1 { font-size: 1.5em; margin-bottom: 0; }
.post .about { color: slategray; font-style: italic; }
.post .body { white-space: pre-line; }
.content:last-child { margin-bottom: 0; }
.content form { margin: 1em 0; display: flex; flex-direction: column; }
.content label { font-weight: bold; margin-bottom: 0.5em; }
.content input, .content textarea { margin-bottom: 1em; }
.content textarea { min-height: 12em; resize: vertical; }
input.danger { color: #cc2f2e; }
input[type=submit] { align-self: start; min-width: 10em; }
You can find a less compact version of ``style.css`` in the
:gh:`example code <examples/tutorial/flaskr/static/style.css>`.
Go to http://127.0.0.1/auth/login and the page should look like the
screenshot below.
.. image:: flaskr_login.png
:align: center
:class: screenshot
:alt: screenshot of login page
You can read more about CSS from `Mozilla's documentation <CSS_>`_. If
you change a static file, refresh the browser page. If the change
doesn't show up, try clearing your browser's cache.
.. _CSS: https://developer.mozilla.org/docs/Web/CSS
Continue to :doc:`blog`.