Jumbotron Styles "From Boostrap to Wordpress"

In the stage one video "Add Bootstrap CSS via the functions.php File", we are supposed to have copied and pasted the source code for the Jumbotron Bootstrap example, separated the header and footer from the index.php file, and included them.

I have done that, and everything works perfectly up to the point when I am adding the styles. This is the one function I have written so far.

<?php

function theme_styles() {
    wp_enqueue_style('bootstrap_css', get_template_directory_uri() . '/css/bootstrap.min.css');
}
add_action('wp_enqueue_scripts', 'theme_styles');

?>

All files are in the correct folders, and the wp_head() function is in the correct spot. I've done this with other Bootstrap examples before, and they all worked perfectly. All styles were included properly. However, with Jumbotron, it's obvious the styles are being included, but not all of them. Buttons are formatted and colored, text is aligned differently, links have had decorations removed. However, other styles are very conspicuously missing. I've started over from scratch twice, and it always turns out the same. It's like I accidentally deleted some of the styles from the stylesheet, but I never even opened it since the last time I used it and I have downloaded a new copy from Bootstrap both times I started over. So I couldn't have changed any of the styling code.

I've spent hours on this one video trying to figure out what's wrong and am at the end of my rope. I even went all the way to including the JS IE10 Windows 8 workaround present in the original code, as I am working in Windows 8, with no luck.