I can say that, after these weeks, I have learned different things about the XHTML and the web pages creation.
I learned about new tabs like <blockquoted></blockquoted>, <span></span>, and new rules to create good, nice, and formal web pages. I want to follow the W3C standard to generate web pages based on quality. 
I learned about tools used in CSS like "lang" to specify the language and other characteristics of the HTML content.
body {
 margin:0;
 padding:0;
 width:100%;
 color:#8a8a8a;
 font:normal 12px/1.5em "Liberation sans", Arial, Helvetica, sans-serif;
 background:#242424 url(../images/main_bg.gif) repeat center top;
}
html, .main {
 padding:0;
 margin:0;
}
.main {
}
.clr {
 clear:both;
 padding:0;
 margin:0;
 width:100%;
 font-size:0;
 line-height:0;
}
h2 {
 margin:8px 0;
 padding:8px 0;
 font-size:25px;
 font-weight:normal;
 color:#3f3f3f;
}
Buen día chicos!!
ResponderBorrarQue padre su blog, seguiré revisando sus avances.
Saludos