diff --git a/node_modules/material-design-lite/src/tooltip/_tooltip.scss b/node_modules/material-design-lite/src/tooltip/_tooltip.scss
new file mode 100644
index 0000000..bec1cd5
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+++ b/node_modules/material-design-lite/src/tooltip/_tooltip.scss
@@ -0,0 +1,65 @@
+/**
+ * Copyright 2015 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+@import "../variables";
+
+.mdl-tooltip {
+  transform: scale(0);
+  transform-origin: top center;
+  z-index: 999;
+  background: $tooltip-background-color;
+  border-radius: 2px;
+  color: $tooltip-text-color;
+  display: inline-block;
+  font-size: $tooltip-font-size;
+  font-weight: 500;
+  line-height: 14px;
+  max-width: 170px;
+  position: fixed;
+  top: -500px;
+  left: -500px;
+  padding: 8px;
+  text-align: center;
+}
+.mdl-tooltip.is-active {
+  animation: pulse 200ms $animation-curve-linear-out-slow-in forwards;
+}
+
+.mdl-tooltip--large {
+  line-height: 14px;
+  font-size: $tooltip-font-size-large;
+  padding: 16px;
+}
+
+@keyframes pulse {
+  0% {
+    transform: scale(0);
+    opacity: 0;
+  }
+  50% {
+    // Fixes a weird bug with the interaction between Safari and the result of
+    // the SASS compilation for the animation.
+    // Essentially, we need to make sure that "50%" and "100%" don't get merged
+    // into a single "50%, 100%" entry, so we need to avoid them having any
+    // matching properties.
+    transform: scale(0.99);
+  }
+  100% {
+    transform: scale(1);
+    opacity: 1;
+    visibility: visible;
+  }
+}