body{
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  color: black;
  margin:0
}



article,aside,details,figcaption,figure,footer,header,hgroup,main,menu,nav,section,summary
{
display:block
}

p{
    color: black;
	font-size: 150%
}

/* unvisited link */
a:link {
  color: red;
}

/* visited link */
a:visited {
  color: green;
}

/* mouse over link */
a:hover {
  color: hotpink;
}

/* selected link */
a:active {
  color: blue;
}

h1 {
  color: yellow;
  background: #add8e6;
  padding: 2px;
  text-align: center;
  }

#article01{
  box-sizing: border-box;
  width: 40%;
  padding: 5px;
  border: 4px solid black;
  background-color: antiquewhite;
 
}
#article02{
  margin-top: 30px;
  box-sizing: border-box;
  padding: 10px;
  border: 1px solid black;
  width: 60%;
  background-color:aquamarine;
}


#rcorners3 {
  border-radius: 25px;
  background: #73AD21;
  padding: 20px; 
  width: 170px;
  height: 150px; 
}


#rcorners4 {
  border-radius: 25px;
  border: 10px solid #73AD21;
background: #add8e6;
  padding: 35px; 
  width: 350px;
  height: 300px; 
}