- Removed unnecessary CSS properties from `base.scss`
- Added `class="h-100"` to the `<html>` tag in `base.html.twig` for full height
- Added `class="d-flex flex-column h-100"` to the `<body>` tag in `base.html.twig` for flexbox layout
- Updated footer styling in `base.html.twig` with additional classes
- Added `class="flex-shrink-0"` to the `<main>` tag in `page.html.twig`
