Removed boilerplate. Set css breakpoints.

src/App.module.css

@@ -1,8 +1,35 @@
-.card {
-  padding: 2em;
-  --main-text-color: lightblue;
+.appContainer {
+  height: 100vh;
+  width: 100%;
 }
 
-.test {
-  color: var(--main-text-color);
+.mainContent {
+}
+
+/* Large - Landscape Tablets / Desktops */
+/* Medium - Portrait Tablets */
+/* Horizontal layout, vertically scrolling picker and palette content */
+@media (min-width: 992px),
+  (min-width: 568px) and (max-width: 991px) and (orientation: portrait) {
+  .appContainer {
+    max-width: 1200px;
+    margin: 0 auto;
+    background-color: blue;
+  }
+}
+
+/* Medium - Landscape Phones */
+/* Horizontal layout, side menu, vertical tabbed picker */
+@media (min-width: 568px) and (max-width: 991px) and (orientation: landscape) {
+  .appContainer {
+    background-color: yellow;
+  }
+}
+
+/* Small - Portrait Phones*/
+/* Vertical layout, side menu, horizontal tabbed picker */
+@media (max-width: 567px) {
+  .appContainer {
+    background-color: red;
+  }
 }

src/App.tsx

@@ -1,40 +1,7 @@
-import { useState } from "react";
-import reactLogo from "./assets/react.svg";
-import viteLogo from "/vite.svg";
-import * as colorlib from "colorlib";
-import "./App.css";
-import style from "./App.module.css";
-import clsx from "clsx";
+import styles from "./App.module.css";
 
 function App() {
-  const [count, setCount] = useState(0);
-  const color = colorlib.Color.from_hex("123123");
-
-  return (
-    <>
-      <div>
-        <a href="https://vite.dev" target="_blank">
-          <img src={viteLogo} className="logo" alt="Vite logo" />
-        </a>
-        <a href="https://react.dev" target="_blank">
-          <img src={reactLogo} className="logo react" alt="React logo" />
-        </a>
-      </div>
-      <h1>Vite + React</h1>
-      <div className={clsx(style.card)}>
-        <button onClick={() => setCount((count) => count + 1)}>
-          count is {count}
-        </button>
-        <p className={clsx(style.test)}>
-          Edit <code>src/App.tsx</code> and save to test HMR
-        </p>
-        <p>The color is: {color.hex.to_code()}</p>
-      </div>
-      <p className="read-the-docs">
-        Click on the Vite and React logos to learn more
-      </p>
-    </>
-  );
+  return <div className={styles.appContainer}></div>;
 }
 
 export default App;

src/index.css

@@ -1,68 +1,11 @@
 :root {
-  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
-  line-height: 1.5;
-  font-weight: 400;
-
-  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;
-}
-
-a {
-  font-weight: 500;
-  color: #646cff;
-  text-decoration: inherit;
-}
-a:hover {
-  color: #535bf2;
 }
 
 body {
+  font-family:
+    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
   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;
-}
-
-@media (prefers-color-scheme: light) {
-  :root {
-    color: #213547;
-    background-color: #ffffff;
-  }
-  a:hover {
-    color: #747bff;
-  }
-  button {
-    background-color: #f9f9f9;
-  }
 }