<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Cap demo</title>

    <style>
      body {
        padding: 0px;
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 100vh;
        margin: 0px;
        flex-direction: column;
      }

      button {
        margin-top: 10px;
        font-family: system, -apple-system, "BlinkMacSystemFont",
       