<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <style>
        body,
        html {
            margin: 0;
        }

        body {
            height: 100vh;
            height: 100dvh;
            display: flex;
            justify-content: center;
            align-items: center;
        }
    </style>

    <script>
        const bodyColor = localStorage.getItem('naive-body-bg