Update hello-world example

Author: ije

examples/hello-world/style/index.css

@@ -1,18 +1,4 @@
-* {
-  margin: 0;
-  padding: 0;
-  border: none;
-  outline: none;
-  font: inherit;
-  font-size: 100%;
-  vertical-align: baseline;
-  background: transparent;
-}
-
-body {
-  font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
-  font-size: 16px;
-}
+@import url('./reset.css');
 
 main {
   display: flex;

examples/hello-world/style/reset.css

@@ -0,0 +1,15 @@
+* {
+  margin: 0;
+  padding: 0;
+  border: none;
+  outline: none;
+  font: inherit;
+  font-size: 100%;
+  vertical-align: baseline;
+  background: transparent;
+}
+
+body {
+  font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
+  font-size: 16px;
+}