style.css

/**
 * Add your custom styles below
 * 
 * Remember: 
 * - Be organised, use comments and separate your styles into meaningful chunks
 *    for example: General styles, Navigation styles, Hero styles, Footer etc.
 * 
 */

* {
  box-sizing: border-box;
}

body {
  background-color: #4586de;
  margin: 20px 80px;
}

.wrapper {
  width: 800px;
  margin: 0 auto;
  border-radius: 10px;
  background-color: white;
}
header {
  padding: 50px 50px 50px 50px;
}
/*Navigation Style*/
nav {
  font-weight: bold;
}
header > #logo {
  font-size: 2em;
}

main {
  padding: 50px;
  overflow: hidden;
}

section {
  float: left;
  width: 60%;
}
aside {
  float: right;
  width: 30%;
  background-color: rgba(255, 255, 128, 0.5);
  padding: 10px;
}

footer {
  padding: 20px;
  border-top: 1px solid blue;
  text-align: center;
}

h3 {
  margin: 10px;
  background-color: rgb(145, 145, 49);
  color: rgb(182, 12, 12);
}
/*First Article's style*/

.articles:first-child {
  background-color: gray;
  border: 1px solid rgb(7, 7, 14);
  padding: 20px 20px 20px 20px;
}

/*general article styles*/
article {
  border-bottom: 1px solid blue;
}