HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Responsive</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <section class="main-section">
        <div class="container">
            <div class="row">
                <div class="col-2-3">
                    <h3>Lijeva stavka 1</h3>
                    <p>
                        Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s,
                    </p>
                </div>
                <div class="col-1-3">
                    <h3>Desna stavka 1</h3>
                    <p>bla bla bl...</p>
                </div>
            </div><!--red 1-->
            <div class="row">
                <div class="col-2-3">
                    <h3>Lijeva stavka 2</h3>
                    <p>
                     Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's                   standard dummy text ever since the 1500s,
                    </p>
                </div>
                <div class="col-1-3">
                    <h3>Desna stavka 2</h3>
                    <p>bla bla bl...</p>
                </div>
            </div><!--red 2-->
            <div class="row">
                <div class="col-2-3">
                    <h3>Lijeva stavka 3</h3>
                    <p>
                        Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s,
                    </p>
                </div>
                <div class="col-1-3">
                    <h3>Desna stavka 3</h3>
                    <p>bla bla bl...</p>
                </div>
            </div><!--red 3-->
        </div>
    </section>
</body>
</html>