Css for my site : [![Site][1]][1]


  [1]: https://i.stack.imgur.com/EBDC3.png

In blue there are my div,
I would like with css make sure that the space between the div and the image there is and the button over the black top bar but I do not know how to do, any ideas?

my css

    .login_reg{
       float: right;
       color: #e0e0ba;
       width: 200px;
       height: 200px;
    }
    
    .login_reg button{
        color: #FFF;
        font-weight: bold;
        background-color: Transparent;
        background-repeat:no-repeat;
        border: none;
        cursor:pointer;
        overflow: hidden;
        outline:none;
    }