Change CSS For Post Title

I am trying to change the css of the title of the post (can see here http://nuttyhiker.com under Latest Blog Post)

I have gone in and changed the line to:

<h2 class="posts-in-page-title"><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>

and added this to the css file:

h2 a.posts-in-page-title {
text-shadow: 1px 1px 1px rgba(59,59,59,1);
font-weight: bold;
color: #000000;
letter-spacing: 1pt;
word-spacing: 2pt;
font-size: 20px !important;
text-align: left;
line-height: 1;
margin: 0;
padding: 0;
}

But it is not reflecting the changes.

Here is the complete code of my php file that I copied over into my theme file (so I could add a featured image):

<!-- NOTE: If you need to make changes to this file, copy it to your current theme's main
	directory so your changes won't be overwritten when the plugin is upgraded. -->

<!-- Start of Post Wrap -->
<div class="post hentry ivycat-post">
	<!-- This is the output of the post TITLE -->
	<h2 class="posts-in-page-title"><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>

	<!-- This is the output of the excerpt -->
	<div class="entry-summary">
	<!-- This will output of the featured image thumbnail  -->
		<div class="featured-image">
			<?php the_post_thumbnail( array(180,9999), array('class' => 'alignleft')); ?>
		</div>
		<?php the_excerpt(); ?>
	</div>

	<!-- This is the output of the META information -->
	<div class="entry-utility">
		<?php if ( count( get_the_category() ) ) : ?>
			<span class="cat-links">
				<?php printf( __( '<span class="%1$s">Posted in</span> %2$s', 'zerogravity-pro' ), 'entry-utility-prep entry-utility-prep-cat-links', get_the_category_list( ', ' ) ); ?>
			</span>
			<span class="meta-sep">|</span>
		<?php endif; ?>
		<?php
			$tags_list = get_the_tag_list( '', ', ' );
			if ( $tags_list ):
		?>
			<span class="tag-links">
				<?php printf( __( '<span class="%1$s">Tagged</span> %2$s', 'zerogravity-pro' ), 'entry-utility-prep entry-utility-prep-tag-links', $tags_list ); ?>
			</span>
			<span class="meta-sep">|</span>
		<?php endif; ?>
		<span class="comments-link"><?php comments_popup_link( __( 'Leave a comment', 'zerogravity-pro' ), __( '1 Comment', 'zerogravity-pro' ), __( '% Comments', 'zerogravity-pro' ) ); ?></span>
		<?php edit_post_link( __( 'Edit', 'zerogravity-pro' ), '<span class="meta-sep">|</span> <span class="edit-link">', '</span>' ); ?>
	</div>
</div>
<!-- // End of Post Wrap -->

What am I missing for it to not work?

https://ww.wp.xz.cn/plugins/posts-in-page/