update styles

templates/base.jinja2

@@ -7,3 +7,9 @@
     {% block content required %}
     {% endblock %}
 </body>
+
+<style>
+* {
+    font-family: sans-serif;
+}
+</style>

templates/index.jinja2

@@ -21,11 +21,11 @@
     <label for="exposure_time">Exposure Time <i>t</i></label>
     <input type="number" name="exposure_time" value="0.5" step="0.1"/>
     <br>
-    
+
     <label for="f_stop">F-stop <i>f</i></label>
     <input type="number" name="f_stop" value="2.4" step=0.1/>
     <br>
-    
+
     <h4>Temperature Settings</h4>
 
     <label for="min_temp">Min Temp (°C)</label>