Edited the templates so that they use styles.css

lance_santuyo_reading/bookshelf/templates/bookshelf/author_details.html

 {%  extends 'base.html' %}
 
 {% block title %} {{ author.first_name }} {{ author.last_name }} {% endblock %}
+
 {% block header %} {{ author.first_name }} {{ author.last_name }} {% endblock %}
+
 {% block content %}
     <p>
         {{ author.age }} <br>
@@ -12,11 +14,13 @@
     <ul>
         {% for work in author.works.all %}
             <li>
-                <a href="{{ work.get_absolute_url }}">{{ work.title }}</a> <br>
+                <a href="{{ work.get_absolute_url }}" class = "item">{{ work.title }}</a> <br>
             </li>
         {% endfor %}
     </ul>
+{% endblock %}
 
+{% block navbar %}
     <a href="http://localhost:8000/home/">Home</a>
     &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
     <a href="http://localhost:8000/books/">Books</a>

lance_santuyo_reading/bookshelf/templates/bookshelf/authors.html

 {%  extends 'base.html' %}
 
 {% block title %} My Favorite Authors {% endblock %}
+
 {% block header %} Lance's Favorite Authors: {% endblock %}
+
 {% block content %}
-    <ul>
+    <div id = "object_bar">
+        <ul id = "object_list">
             {% for author in author_list %}
                 <li>
-                <a href="{{ author.get_absolute_url }}">{{ author.first_name }} {{ author.last_name }}</a> <br>
+                    <a href="{{ author.get_absolute_url }}" class = "item">{{ author.first_name }} {{ author.last_name }}</a> <br>
                 </li>
             {% endfor %}
         </ul>
+    </div>
+{% endblock %}
 
+{% block navbar %}
     <a href="http://localhost:8000/home/">Home</a>
     &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
     <a href="http://localhost:8000/books/">Books</a>

lance_santuyo_reading/bookshelf/templates/bookshelf/book_details.html

 {%  extends 'base.html' %}
 
 {% block title %} {{ books.title }} {% endblock %}
+
 {% block header %} {{ books.title }} {% endblock %}
+
 {% block content %}
     <p>
-        <a href="{{ books.author.get_absolute_url }}">
+        <li>
+        <a href="{{ books.author.get_absolute_url }}" class = "item">
             {{ books.author.first_name }} {{ books.author.last_name }}
         </a> <br>
+        </li>
+
         {{ books.publisher }} <br>
         {{ books.year_published }} <br>
         {{ books.ISBN }} <br>
         {{ books.blurb }} <br>
     </p>
+{% endblock %}
 
+{% block navbar %}
     <a href="http://localhost:8000/home/">Home</a>
     &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
     <a href="http://localhost:8000/books/">Books</a>

lance_santuyo_reading/bookshelf/templates/bookshelf/books.html

 {%  extends 'base.html' %}
 
 {% block title %} My Favorite Books {% endblock %}
+
 {% block header %} Lance's Favorite Books: {% endblock %}
+
 {% block content %}
-    <ul>
+    <div id = "object_container">
+         <ul id = "object_list">
             {% for book in book_list %}
                 <li>
-                <a href="{{ book.get_absolute_url }}">{{ book.title }}</a> <br>
+                    <a href="{{ book.get_absolute_url }}" class = "item">{{ book.title }}</a> <br>
                 </li>
             {% endfor %}
         </ul>
+    </div>
+
+{% endblock %}
 
+{% block navbar %}
     <a href="http://localhost:8000/home/">Home</a>
     &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
     <a href="http://localhost:8000/authors/">Authors</a>

lance_santuyo_reading/bookshelf/templates/bookshelf/home.html

 {%  extends 'base.html' %}
 
 {% block title %} My Favorite Books & Authors {% endblock %}
+
 {% block header %} Welcome to Lance's Database of Favorite Books and Authors! {% endblock %}
+
 {% block content %}
     <p>
         Hello, I'm Lance! This is a short collection of my favorite books and authors. While I'm open to most types
         of books, I particularly enjoy fantasy books, especially those with magic!
     </p>
+{% endblock %}
+
+{% block navbar %}
     <a href="http://localhost:8000/books/">Books</a>
     &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
     <a href="http://localhost:8000/authors/">Authors</a>

lance_santuyo_reading/templates/base.html

 <!DOCTYPE html>
+{% load static %}
 <html lang="en">
+    <link rel="stylesheet" href="{% static 'styles.css' %}">
+
     <head>
         <title> {% block title %} Title {% endblock %}</title>
     </head>
-
+    <div id = "main">
+        <body>
             <h1>
                 {% block header %} Header {% endblock %}
             </h1>
 
-    <body>
+            <div id = "content">
                 {% block content %} Content {% endblock %}
+            </div>
+            <div id = "navbar">
+                {% block navbar %} Navigation bar {% endblock %}
+            </div>
         </body>
+    </div>
 </html>
\ No newline at end of file