Update the style of the template

src/HelloWorld.elm

@@ -1,7 +1,7 @@
 module HelloWorld exposing (helloWorld)
 
 import Html exposing (Html, a, button, code, div, h1, p, text)
-import Html.Attributes exposing (href)
+import Html.Attributes exposing (href, style)
 import Html.Events exposing (onClick)
 import Msg exposing (Msg(..))
 
@@ -15,9 +15,16 @@ helloWorld model =
             , text " | "
             , a [ href "https://guide.elm-lang.org/" ] [ text "Elm Documentation" ]
             ]
-        , button [ onClick Increment ] [ text "+" ]
-        , text <| "Count is: " ++ String.fromInt model
-        , button [ onClick Decrement ] [ text "-" ]
+        , div
+            [ style "display" "flex"
+            , style "justify-content" "center"
+            , style "align-items" "center"
+            , style "gap" "1rem"
+            ]
+            [ button [ onClick Increment ] [ text "+" ]
+            , text <| "Count is: " ++ String.fromInt model
+            , button [ onClick Decrement ] [ text "-" ]
+            ]
         , p []
             [ text "Edit "
             , code [] [ text "src/Main.elm" ]

style.css

@@ -1,13 +1,84 @@
-#app {
-  font-family: Avenir, Helvetica, Arial, sans-serif;
+:root {
+  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+  position: fixed;
+  overflow: hidden;
+  height: 100svh;
+  width: 100vw;
+
+  color-scheme: light dark;
+  color: rgba(255, 255, 255, 0.87);
+  background-color: #242424;
+
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
-  text-align: center;
-  color: #2c3e50;
-  margin: 0 auto;
-  margin-top: 60px;
+  -webkit-text-size-adjust: 100%;
 }
 
 a {
-  color: #60b5cc;
-}
+  font-weight: 500;
+  color: #646cff;
+  text-decoration: inherit;
+}
+a:hover {
+  color: #535bf2;
+}
+
+body {
+  margin: 0;
+  display: flex;
+  place-items: center;
+  min-width: 320px;
+  min-height: 100vh;
+}
+
+h1 {
+  font-size: 3.2em;
+  line-height: 1.1;
+}
+
+button {
+  border-radius: 8px;
+  border: 1px solid transparent;
+  padding: 0.6em 1.2em;
+  font-size: 1em;
+  font-weight: 500;
+  font-family: inherit;
+  background-color: #1a1a1a;
+  cursor: pointer;
+  transition: border-color 0.25s;
+}
+button:hover {
+  border-color: #646cff;
+}
+button:focus,
+button:focus-visible {
+  outline: 4px auto -webkit-focus-ring-color;
+}
+
+.card {
+  padding: 2em;
+}
+
+#app {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: 2rem;
+  text-align: center;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #213547;
+    background-color: #ffffff;
+  }
+  a:hover {
+    color: #747bff;
+  }
+  button {
+    background-color: #f9f9f9;
+  }
+}