first commit

_static/global/Page.html

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+{{ extends "otree/Page.html" }}
+{{ load otree static }}
+
+{{ block global_styles }}
+    <link rel="stylesheet" href="{% static 'global/custom.css' %}">
+{{ endblock }}
+
+{{ block global_scripts  }}
+{{ endblock }}

_static/global/custom.css

@@ -0,0 +1,25 @@
+* {
+    margin: 0;
+    padding: 0;
+    border: 0;
+    outline: 0;
+}
+.center {
+    margin-left: auto;
+    margin-right: auto;
+}
+.otree-title {            
+    margin-top:-30px; 
+} 
+.container {
+    height: 50px;
+    position: relative;
+}
+.centering {
+    margin: 0;
+    position: absolute;
+    top: 50%;
+    left: 50%;
+    -ms-transform: translate(-50%, -50%);
+    transform: translate(-50%, -50%);
+}