HdSusanto

Add this code in your child theme style.css

.site-description { color: white !important; }

Remove <?php get_sidebar(); ?> on index.php and page.php.

Update
Or replace if ( is_active_sidebar( 'sidebar-2' ) ) : ?> on siderbar.php with
if( is_single() && ( is_active_sidebar( 'sidebar-2' ) ) ) : ?>

Right click than see the resource. Or maybe you can use one of this to make your own https://www.google.com/#psj=1&q=css+button+generator

Try this:

function remove_more_link_scroll( $link ) {
	$link = preg_replace( '|#more-[0-9]+|', '', $link );
	return $link;
}
add_filter( 'the_content_more_link', 'remove_more_link_scroll' );