Структура страницы html5
<!DOCTYPE html><html lang="ru-RU">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<head>
<title> </title>
<link rel="stylesheet" href="style.css">
</head>
<body>
</body>
</html>
<html lang="ru-RU">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<head>
<title> </title>
<link rel="stylesheet" href="style.css">
</head>
<body>
</body>
</html>