How can I make my website look more like the second image presented below? (Notice the left margin in the second image, versus no margin in the first one.)

<http://fotografcim-2.hosting.parking.ru/> (This is a demo site.)

No margin: 
![Before](https://i.stack.imgur.com/QreBK.jpg)

Margin:
![After](https://i.stack.imgur.com/rVhyg.jpg)