Converting

from Ext CSS

.post {
	font-size: 0.875em;
	p, ul, ol {
		margin: 0 0 14px;
	}
	ul, ol {
		padding: 0;
		li {
			display: list-item;
		}
	}
}

to simple CSS

.post {
	font-size: 0.875em;
}
.post p, .post ul, .post ol {
	margin: 0 0 14px;
}
.post ul, .post ol {
	padding: 0;
}
.post ul li, .post ol li {
	display: list-item;
}

Advantages

• Fast and lightweight
• Uses PHP for greater compatibility
• Support CSS Variables
• Cross-browser valid code