Customizing CSS on Standard Theme

I just switched from wordpress.com to www.remarpro.com and am having difficulty applying the CSS customizations that I used for Standard Theme on wordpress.com.

I have tried several CSS editor plug-ins including Jetpack, Simple Custom CSS, WP Add Custom CSS. None of them override the original stylesheet, except when I use Jetpack the title color does change, but that is all.

Reading in the forums it sounds like maybe the class names aren’t lining up? How do I change my CSS customizations to make them work in the plug-ins?

My site is not up and running yet because of this glitch.

Below is part, not all, of the customizations I used on wordpress.com.

Thanks!
Shannon

/* Header
—————————————————————- */
/* Header Text
———————————————- */
/* site title */
#site-title,
#site-title a {
color: #357FB5;
}

#site-title a:hover {
color: #357FB5;
}

/* tagline */
#site-description {
color: #2978a2;
}

#site-title {
text-align: center;
}

#site-description {
text-align: center;
}

#site-description {
position: inherit;
width: 100%;
top: 0;
display: block;
text-align: center;
}

.post .thumbnail {
background: transparent;
border: none;
-webkit-box-shadow: none;
-moz-box-shadow: none;
box-shadow: none;
}

.the-tags {
display: none;
}

#menu-under-header
.navbar-inner {
background: transparent;
-webkit-box-shadow: none;
-moz-box-shadow: none;
box-shadow: none;
filter: none;
}