Can’t login to admin after moving WordPress to its own directory

My site keeps getting hacked, so I decided to move WordPress to its own directory so that I can generate and use static pages in the main directory with Simply Static.

I am trying to move WordPress to its own directory, using “Method II” here: https://codex.www.ads-software.com/Giving_WordPress_Its_Own_Directory

Here’s what I did:

1. Create the new location for the core WordPress files to be stored (https://subvariant.com/wordpress/)
2-5. In “wp_options” via PHPMyAdmin I set “home” to “https://subvariant.com”
And “siteurl” to “https://subvariant.com/wordpress”
6. Now move your WordPress core files (from root directory) to the subdirectory (https://subvariant.com/wordpress/).
7. Copy (NOT MOVE!) the index.php and .htaccess files from the WordPress directory into the root directory of your site (https://subvariant.com).

Here is the .htaccess at https://subvariant.com

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

AddHandler application/x-httpd-php70 .php .php5 .php4 .php3

Here is the .htaccess at https://subvariant.com/wordpress

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress

AddHandler application/x-httpd-php70 .php .php5 .php4 .php3

8. Open your root directory’s index.php file in a text editor
9. Change the following and save the file. Change the line that says:
require( dirname( __FILE__ ) . ‘/wp-blog-header.php’ );
to the following, using your directory name for the WordPress core files:
require( dirname( __FILE__ ) . ‘/wordpress/wp-blog-header.php’ );
10. Login to the new location: https://subvariant.com/wordpress/wp-admin/

And here where it doesn’t work.

The url goes to: https://subvariant.com/wordpress/wp-login.php?redirect_to=https%3A%2F%2Fsubvariant.com%2Fwordpress%2Fwp-admin%2F&reauth=1

The css is not working, and using a correct login doesn’t do anything–it stays on the same page.

The page I need help with: [log in to see the link]