Page specific CSS questions

[Topic changed to be useful]

Greetings all, I am in the current process of making a political hypocrisy site. Hence why my username is political.

What I have so far on the index page looks great! https://hypocrisy-now.com/

However, I want to use a different theme on various pages. For instance if you go to https://hypocrisy-now.com/libertarians.php The right and left hand columns are still there. I would like them gone. Also I would like

I want the four pages {libertarians.php, conspiracies.php, conservatives.php, and liberals.php} to add the following .css code

<style type="text/css">
.content2 {

	padding:10px 0;
	width: 1000px;
	float: right;
}

.rows {
display: block;
	margin-bottom:5px;
	padding:10px 0;
	color: #059BD8;
	background-color: #EFEFEF;
	font-size: 18px;
}
</style>

This style will change the homepage style to make it look like more of a grid layout where the posts are smaller and you can see all the articles based on whatever category you clicked on. I had it set up perfect in HTML, and now I’m just trying to convert it to wordpress, but I’ve run into some issues.

I’ve been reading the documentations and I know that I can use two different themes, but since my header.php uses the get_template_part method to extract different parts of the CSS code the sidebars are all still there no matter what changes I make to various css files. I am not sure how to fix this mess.