row-1
row-2
row-3

code
Exported from Notepad++
<!DOCTYPR html> <html lang="en"> <head> <meta charset="UTF-8"> <title>BootStrap</title> <link rel="stylesheet" type="text/css" href="./myheading.css"> <style> .container{ border:2px solid black; } .row{ border:2px solid blue; } </style> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-9ndCyUaIbzAi2FUVXJi0CjmCapSmO7SnpJef0486qhLnuZ2cdeRhO02iuK6FUUVM" crossorigin="anonymous"> <link rel="stylesheet" href="style.css"> </head> <body> <div class="container"> <div class="row"> row-1</div> <div class="row"> row-2</div> <div class="row"> row-3</div> </div> </body> </html>