CSS style works (as far as I can see) for all elements except the container div.
I can't get it to work, I have tried everything. It should have width and height and a black background color. This is the code that doesn't apply :

```
#container {
    width: 588px;
    height: 617px;
    background-color:#000;
    margin: auto;    
}

```

The code seems right. Both CSS and HTML have passed the w3c validators.

Please help, I'm clueless. Thank you.