Added and included ol.css.

lostplaces/lostplaces_app/static/ol.css

@@ -0,0 +1,2 @@
+.ol-box{box-sizing:border-box;border-radius:2px;border:2px solid #00f}.ol-mouse-position{top:8px;right:8px;position:absolute}.ol-scale-line{background:rgba(0,60,136,.3);border-radius:4px;bottom:8px;left:8px;padding:2px;position:absolute}.ol-scale-line-inner{border:1px solid #eee;border-top:none;color:#eee;font-size:10px;text-align:center;margin:1px;will-change:contents,width;transition:all .25s}.ol-scale-bar{position:absolute;bottom:8px;left:8px}.ol-scale-step-marker{width:1px;height:15px;background-color:#000;float:right;z-Index:10}.ol-scale-step-text{position:absolute;bottom:-5px;font-size:12px;z-Index:11;color:#000;text-shadow:-2px 0 #fff,0 2px #fff,2px 0 #fff,0 -2px #fff}.ol-scale-text{position:absolute;font-size:14px;text-align:center;bottom:25px;color:#000;text-shadow:-2px 0 #fff,0 2px #fff,2px 0 #fff,0 -2px #fff}.ol-scale-singlebar{position:relative;height:10px;z-Index:9;border:1px solid #000}.ol-unsupported{display:none}.ol-unselectable,.ol-viewport{-webkit-touch-callout:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}.ol-overlaycontainer,.ol-overlaycontainer-stopevent{pointer-events:none}.ol-overlaycontainer-stopevent>*,.ol-overlaycontainer>*{pointer-events:auto}.ol-selectable{-webkit-touch-callout:default;-webkit-user-select:text;-moz-user-select:text;-ms-user-select:text;user-select:text}.ol-grabbing{cursor:-webkit-grabbing;cursor:-moz-grabbing;cursor:grabbing}.ol-grab{cursor:move;cursor:-webkit-grab;cursor:-moz-grab;cursor:grab}.ol-control{position:absolute;background-color:rgba(255,255,255,.4);border-radius:4px;padding:2px}.ol-control:hover{background-color:rgba(255,255,255,.6)}.ol-zoom{top:.5em;left:.5em}.ol-rotate{top:.5em;right:.5em;transition:opacity .25s linear,visibility 0s linear}.ol-rotate.ol-hidden{opacity:0;visibility:hidden;transition:opacity .25s linear,visibility 0s linear .25s}.ol-zoom-extent{top:4.643em;left:.5em}.ol-full-screen{right:.5em;top:.5em}.ol-control button{display:block;margin:1px;padding:0;color:#fff;font-size:1.14em;font-weight:700;text-decoration:none;text-align:center;height:1.375em;width:1.375em;line-height:.4em;background-color:rgba(0,60,136,.5);border:none;border-radius:2px}.ol-control button::-moz-focus-inner{border:none;padding:0}.ol-control button span{pointer-events:none}.ol-zoom-extent button{line-height:1.4em}.ol-compass{display:block;font-weight:400;font-size:1.2em;will-change:transform}.ol-touch .ol-control button{font-size:1.5em}.ol-touch .ol-zoom-extent{top:5.5em}.ol-control button:focus,.ol-control button:hover{text-decoration:none;background-color:rgba(0,60,136,.7)}.ol-zoom .ol-zoom-in{border-radius:2px 2px 0 0}.ol-zoom .ol-zoom-out{border-radius:0 0 2px 2px}.ol-attribution{text-align:right;bottom:.5em;right:.5em;max-width:calc(100% - 1.3em)}.ol-attribution ul{margin:0;padding:0 .5em;color:#000;text-shadow:0 0 2px #fff}.ol-attribution li{display:inline;list-style:none}.ol-attribution li:not(:last-child):after{content:" "}.ol-attribution img{max-height:2em;max-width:inherit;vertical-align:middle}.ol-attribution button,.ol-attribution ul{display:inline-block}.ol-attribution.ol-collapsed ul{display:none}.ol-attribution:not(.ol-collapsed){background:rgba(255,255,255,.8)}.ol-attribution.ol-uncollapsible{bottom:0;right:0;border-radius:4px 0 0}.ol-attribution.ol-uncollapsible img{margin-top:-.2em;max-height:1.6em}.ol-attribution.ol-uncollapsible button{display:none}.ol-zoomslider{top:4.5em;left:.5em;height:200px}.ol-zoomslider button{position:relative;height:10px}.ol-touch .ol-zoomslider{top:5.5em}.ol-overviewmap{left:.5em;bottom:.5em}.ol-overviewmap.ol-uncollapsible{bottom:0;left:0;border-radius:0 4px 0 0}.ol-overviewmap .ol-overviewmap-map,.ol-overviewmap button{display:inline-block}.ol-overviewmap .ol-overviewmap-map{border:1px solid #7b98bc;height:150px;margin:2px;width:150px}.ol-overviewmap:not(.ol-collapsed) button{bottom:1px;left:2px;position:absolute}.ol-overviewmap.ol-collapsed .ol-overviewmap-map,.ol-overviewmap.ol-uncollapsible button{display:none}.ol-overviewmap:not(.ol-collapsed){background:rgba(255,255,255,.8)}.ol-overviewmap-box{border:2px dotted rgba(0,60,136,.7)}.ol-overviewmap .ol-overviewmap-box:hover{cursor:move}
+/*# sourceMappingURL=ol.css.map */

lostplaces/lostplaces_app/templates/partials/osm_map.html

@@ -1,5 +1,9 @@
 {% load static %}
 
+{% block additional_head %}
+    <link rel="stylesheet" href="{% static 'ol.css' %}" type="text/css">
+{% endblock additional_head %}
+
 <div id="map" class="map"></div>
     <div id="info" class="map-popup"></div>
     <script src="{% static 'ol.js' %}"></script>