Код IT Загрузка примера кода…

HTML main.html 
<!DOCTYPE html>
<html lang="ru">
<head>
  <meta charset="UTF-8">
  <title>Квадрат SVG</title>
  <style>
    body { margin: 0; display: grid; place-items: center; min-height: 100dvh; background: #f1f5f9; }
  </style>
</head>
<body>
  <svg width="240" height="240" viewBox="0 0 240 240" role="img" aria-label="Квадрат">
    <rect x="70" y="70" width="100" height="100"
          fill="none" stroke="#1e293b" stroke-width="3"/>
  </svg>
</body>
</html>
<!DOCTYPE html>
<html lang="ru">
<head>
  <meta charset="UTF-8">
  <title>Квадрат SVG</title>
  <style>
    body { margin: 0; display: grid; place-items: center; min-height: 100dvh; background: #f1f5f9; }
  </style>
</head>
<body>
  <svg width="240" height="240" viewBox="0 0 240 240" role="img" aria-label="Квадрат">
    <rect x="70" y="70" width="100" height="100"
          fill="none" stroke="#1e293b" stroke-width="3"/>
  </svg>
</body>
</html>