Hi Bro,
If you want both divs in the same row you can use style=" display: flex". This will default make both divs in a row. I you want to make both divs aligned in the column, then you can use, style=" display: flex; flex-direction: column".
If you want to center align row-wise then you can use, style="justify-content: center" and if you want to align column-wise, then you can use, style="align-item: center".

Hi

If you need to make two divs side by side you can use the style= display:flex ! important; inside your container.This important is giving to makes priority for your style.You can provide this style as inline.example:<div class="container"></div>
Or you can create a directory inside your module and provide this CSSexample:.container{ display:flex !important;}
and you can specify the path  in assets inside the manifest  like
'assets': {
        'web.assets_backend': [
               module_name/static/src/css/style.css        ]}

Hope it helps