* { 
  margin: 0;
  padding:0;
}
.wrapper {
  margin: 5px auto;
  width: 960px;
}
.head_foot {
  border: 1px solid black;
  padding: 5px;
  text-align:center;
  background-color: sienna;
  color: white;
  font-size: 120%;
}
.mainnav {
  float: left;
  margin: 0;
  margin-top: 10px;
  padding: 2% 2%;
  border: 0;
  width: 16%;
}
.sidebar {
  float: right;
  margin: 0;
  margin-top: 10px;
  padding: 2% 2%;
  border: 0;
  width: 20%;
}
.main_part {
  float: left;
  padding:  0 2%;
  margin: 0;
  margin-top: 10px;
  border: 0;
  width: 52%;
}
.clear { clear: both; }
.article_img {
  float: left;
  margin-right: 10px;
  margin-bottom: 10px;
 }
.myarticle {
  padding: 5px;
  margin-bottom: 5px;
  width: 100%;
}
.article_h2 {
  background-color: burlywood;
  border: 1px solid black;
  font-size: 120%;
  padding: 3px;
}
.article_p {
  border: 1px solid black;
  border-top: 0px;
  padding: 6px;
}
.nav_h3 {
  background-color: sandybrown;
  border: 1px solid black;
  font-size: 120%;
  padding: 3px;
}
.nav_li {
  list-style-type: none;
}
.nav_ul {
  border: 1px solid black;
  border-top: 0px;
  padding: 5px;
}
.aside_h3 {
  background-color: sandybrown;
  border: 1px solid black;
  font-size: 120%;
  padding: 3px;
}
.aside_li {
  list-style-type: none;
}