Bootstrap 4.0 - responsive header with image + nav

I am building a responsive page with bootstrap 4 which has a heading/title section with an image of the client's logo, their name and a navbar. All these elements are responsive, i.e. the image shrinks according to screen size and the navbar minimizes on small screens.

Now I would like to have the body also in a responsive way. i.e.: fill the remaining height of the screen with content, use a scrollbar to display all the content if necessary.
But for some reason I cannot figure out how to span the remaining part of the page over the whole height. It is either too large on some larger screens, when it fits perfectly for mobile devices, or it fits perfectly on large screens, but has only half the height it should have on mobile devices.

The page is roughly build with this structure:

<!DOCTYPE html>
<html lang="de" style="height:100%">

<head>
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
  <title>Client Name</title>
</head>

<body class="main" style="height:100%">
  <div class="container">
    <div class="text-center">
    <!-- Client image goes here -->
    <h1 style="display:inline;margin-left:0.6em;color:#8b7d7b">Client Name</h1>
   </div>
  </div>
  <nav class="navbar navbar-expand-lg navbar-light" style="background-color:#e0eee0">
    <button class="navbar-toggler collapsed" type="button" data-toggle="collapse" data-target="#mainnavbar" aria-controls="mainnavbar" aria-expanded="false" aria-label="Toggle Navigation">
  <span class="navbar-toggler-icon"></span>
</button>
<div id="mainnavbar" class="navbar-collapse collapse justify-content-md-center">
  <ul class="navbar-nav">
    <li class="nav-item nav-link active">Page A</li>
  </ul>
</div>
</nav>
<div class="container" style="height:70vh">
<div class="row" style="height:100%">
  <!-- Main body of page -->
  <div class="col-sm-1 col-md-9" style="height:100%">
    <p class="col-scrol">
      <!-- Main part of the page. Content should have full height and scroll vertically if necessary -->
    </p>
  </div>
  <!-- Comment section (scrolling) -->
  <div class="d-none d-md-block col-md-3 comment-section">
        <!-- Comment section at the left hand side of the page -->      
  </div>
 </div>
 </div>
</body>

</html>

I created a plunkr which actually shows the whole page:
https://plnkr.co/edit/GQHoephQyx3hoejgkT4k?p=preview

What is the correct way, with bootstrap 4.0, to display the page as desired, i.e. use the full remaining height which is left when the image shrinks/grows depending on screen size?

EDIT for clarification:
The content itself should have a scrollbar, but not the whole page. I.e. the header with the image and the menu bar should always stay visible, while the content which comes afterwards should have a scrollbar, if necessary.

Instead of setting defined heights, use flexbox to make the content area fill the height of it's parent container (which in this case is the body).

body {
    display:flex;
    flex-direction:column;
}

.flex-fill {
    flex: 1 1 auto;
}

.flex-shrink {
    flex-shrink: 0;
}

https://www.codeply.com/go/fKNRvG0Hak

Note: The flex-fill utility class will be included in the next Bootstrap 4 release: https://github.com/twbs/bootstrap/commit/2137d61eacbd962ea41e16a492da8b1d1597d3d9

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