RWD Grid View

<!DOCTYPE html>
<html>
<head>
    <style>
        * { box-sizing: border-box; }
        .col-6 { width: 50%; float: left; padding: 15px; }
        .col-12 { width: 100%; float: left; padding: 15px; }
        .kotak { background: #e0f2fe; padding: 20px; text-align: center; border-radius: 6px; font-family: sans-serif; }
    </style>
</head>
<body>
    <div class="col-6"><div class="kotak">Kolom Kiri 50%</div></div>
    <div class="col-6"><div class="kotak">Kolom Kanan 50%</div></div>
</body>
</html>