Create app.css

app.css

@@ -0,0 +1,63 @@
+body {
+  font-family: 'HelveticaNeue-UltraLight',
+               'Helvetica Neue UltraLight', 
+               'Helvetica Neue', 
+                Helvetica, 
+                Arial, 
+                sans-serif;
+  margin: 0;
+  background-color: #efeff5;
+}
+
+.stopwatch {text-align: center }
+
+.stopwatch-timer {
+  font-size: 76px;
+  font-weight: 100;
+  line-height: 160px;
+  margin: 0;
+  border: solid #c3cfd0;
+  border-width: 1px 0;
+  background-color: white;
+}
+
+
+.stopwatch-laps {
+  padding: 0 0 0 20px;
+  list-style-type: none;
+}
+
+.stopwatch-lap{
+  font-size: 20px;
+  line-height: 60px;
+  padding-right: 20px;
+  text-align: right;
+  border-bottom: 1px solid #d9dae0;
+}
+
+.stopwatch-lap strong {
+  float: left;
+  color: #7f8083;
+  font-weight: 100;
+}
+
+.stopwatch-lap strong::before {content: 'Lap '}
+
+.btn {
+  font-family: inherit;
+  font-size: 20px;
+  display: inline-block;
+  width: 72px;
+  height:72px;
+  margin:24px;
+  padding: 0;
+  cursor: pointer;
+  letter-spacing: 1px;
+  border: 0;
+  border-radius:50%;
+  outline: none;
+  background: white;
+}
+
+.start-btn {color: #4bd761}
+.stop-btn {color: #fd3d2a}