div takes 100% width tailwind css react app

Hi I'm trying to have an easy app takes 100% of my screen width so that it is can be centered horizontally. But right now my app keeps only using like 1/5 of my screen width starting on the left.

My app component calling my only other component ProfileSection

function App() {
  return (
    <main className="flex h-screen justify-center items-center bg-gray-100">
      <ProfileSection
        profilePicUrl={pp}
        currentFollowers={137}
        goalFollowers={200}
      />
    </main>
  );
}

export default App;

    return (
        <section className="bg-black w-full">
            <div className="max-w-4xl mx-auto flex flex-col items-center gap-6">
                <img
                    src={profilePicUrl}
                    alt="Profile"
                    className="w-32 h-32 rounded-full border-4 border-blue-500 shadow"
                />

                <div className="w-full px-4">
                    <div className="flex justify-between text-sm text-gray-600 font-medium mb-1">
                        <span>{currentFollowers} followers</span>
                        <span>Goal: {goalFollowers}</span>
                    </div>
                    <div className="w-full bg-gray-200 h-4 rounded-full">
                        <div
                            className="h-4 bg-blue-500 rounded-full transition-all duration-500"
                            style={{ width: `${progressPercent}%` }}
                        ></div>
                    </div>
                </div>
            </div>
        </section>

    );

EDIT: Added index.css content

: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 {
  margin: 0;
  display: flex;
  place-items: center;
  width: 100%;
  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;
  }
}

@import "tailwindcss"

There are two ways to make it work.

I have created base Vite project, so I guess your setup is same.

1. As you have <div id="root"></div> in your index.html, one way could be to add

#root {
  width: 100%;
}

2. Or simply add w-screen to your main element in App.jsx

<main className="flex w-screen h-screen justify-center items-center bg-gray-100">