Add loading spinner to the webpage

1 files changed, 37 insertions, 1 deletions

diff --git a/web/app.css b/web/app.css
index 897fd0cbc..3c4507e38 100644
--- a/web/app.css
+++ b/web/app.css
@@ -12,8 +12,44 @@
 }
 
 #attribution {
-    position: fixed;
+    position: absolute;
     bottom: 10px;
     right: 15px;
     font-size: x-small;
 }
+
+#spinner {
+    position: absolute;
+    top: 50%;
+    left: 50%;
+    height: 60px;
+    width: 60px;
+    margin-top: -30px;
+    margin-left: -30px;
+    -webkit-animation: rotation .8s infinite linear;
+    -moz-animation: rotation .8s infinite linear;
+    -o-animation: rotation .8s infinite linear;
+    animation: rotation .8s infinite linear;
+    border-left: 6px solid rgba(56, 146, 212, .15);
+    border-right: 6px solid rgba(56, 146, 212, .15);
+    border-bottom: 6px solid rgba(56, 146, 212, .15);
+    border-top: 6px solid rgba(56, 146, 212, .8);
+    border-radius: 100%;
+}
+
+@-webkit-keyframes rotation {
+    from { -webkit-transform: rotate(0deg); }
+    to { -webkit-transform: rotate(359deg); }
+}
+@-moz-keyframes rotation {
+    from { -moz-transform: rotate(0deg); }
+    to { -moz-transform: rotate(359deg); }
+}
+@-o-keyframes rotation {
+    from { -o-transform: rotate(0deg); }
+    to { -o-transform: rotate(359deg); }
+}
+@keyframes rotation {
+    from { transform: rotate(0deg); }
+    to { transform: rotate(359deg); }
+}