<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <style>
    body {
      width: 280px;
      padding: 24px;
      margin: 0;
      background: #1a1a1a;
      color: #ffffff;
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      box-sizing: border-box;
    }
    
    button {
      width: 100%;
      padding: 12px 16px;
      margin-bottom: 12px;
      font-size: 14px;
      font-weight: 500;
      cursor: pointer;
      border: none;
      border-radius: 8px;
 