first commit

modules/mailchimppro/views/css/spinner.css

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+.spinner {
+    width: 40px;
+    height: 40px;
+
+    position: relative;
+    margin: 100px auto;
+}
+
+.double-bounce1, .double-bounce2 {
+    width: 100%;
+    height: 100%;
+    border-radius: 50%;
+    background-color: #FFE01B;
+    opacity: 0.5;
+    position: absolute;
+    top: 0;
+    left: 0;
+
+    -webkit-animation: sk-bounce 2.0s infinite ease-in-out;
+    animation: sk-bounce 2.0s infinite ease-in-out;
+}
+
+.double-bounce2 {
+    -webkit-animation-delay: -1.0s;
+    animation-delay: -1.0s;
+}
+
+@-webkit-keyframes sk-bounce {
+    0%, 100% { -webkit-transform: scale(0.0) }
+    50% { -webkit-transform: scale(1.0) }
+}
+
+@keyframes sk-bounce {
+    0%, 100% {
+        transform: scale(0.0);
+        -webkit-transform: scale(0.0);
+    } 50% {
+          transform: scale(1.0);
+          -webkit-transform: scale(1.0);
+      }
+}