added new parent page + minor css/js improvements

templates/import.html

@@ -1,12 +1,19 @@
 {% extends "base.html" %}
+{% load static %}
 {% block title %}Import tasks{% endblock %}
+{% block head %}
+    <link rel="stylesheet" href="{% static "form.css" %}">
+{% endblock %}
 {% block main %}
-    <form action="" method="POST" enctype="multipart/form-data">
-        {% csrf_token %}
-        <div>
-            <label for="file">File</label>
-            <input type="file" name="file" id="file">
-        </div>
-        <button type="submit">Import</button>
-    </form>
+    <div class="container">
+        <h1>Import tasks</h1>
+        <form action="" method="POST" enctype="multipart/form-data">
+            {% csrf_token %}
+            <div>
+                <label for="file">File</label>
+                <input type="file" name="file" id="file">
+            </div>
+            <button type="submit">Import</button>
+        </form>
+    </div>
 {% endblock %}