HTML checks

<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>A little idea, out in the world</title>
  <style>
    body { font-family: system-ui; background: #fff; color: #0b0b0c; padding: 12vw 8vw; }
    h1 { font-size: clamp(36px, 6vw, 72px); letter-spacing: -0.045em; line-height: 1.05; max-width: 700px; }
    p { color: #6e6e76; font-size: 18px; line-height: 1.7; }
    button { background: #0b0b0c; color: white; border: 0; padding: 14px 24px; border-radius: 999px; cursor: pointer; }
  </style>
</head>
<body>
  <p>A SMALL BEGINNING</p>
  <h1>A little idea,<br>out in the world.</h1>
  <p>Every good thing starts somewhere. This one starts here.</p>
  <button onclick="this.textContent='Hello, world!'">Say hello ↗</button>
</body>
</html>