Update style.css

style.css

@@ -1,28 +1,71 @@
 body {
-	padding: 2rem;
-	font-family: -apple-system, BlinkMacSystemFont, "Arial", sans-serif;
+  font-family: Arial, sans-serif;
+  margin: 0;
 }
 
-h1 {
-	font-size: 16px;
-	margin-top: 0;
+header {
+  background-color: #333;
+  color: #fff;
+  padding: 20px;
+  text-align: center;
 }
 
-p {
-	color: rgb(107, 114, 128);
-	font-size: 15px;
-	margin-bottom: 10px;
-	margin-top: 5px;
+header h1 {
+  margin: 0;
 }
 
-.card {
-	max-width: 620px;
-	margin: 0 auto;
-	padding: 16px;
-	border: 1px solid lightgray;
-	border-radius: 16px;
+nav {
+  background-color: #f1f1f1;
+  overflow: hidden;
 }
 
-.card p:last-child {
-	margin-bottom: 0;
+nav ul {
+  list-style-type: none;
+  margin: 0;
+  padding: 0;
+  overflow: hidden;
+  background-color: #f1f1f1;
+}
+
+nav li {
+  float: left;
+}
+
+nav a {
+  display: block;
+  color: black;
+  text-align: center;
+  padding: 14px 16px;
+  text-decoration: none;
+}
+
+nav a:hover {
+  background-color: #ddd;
+  color: black;
+}
+
+#main-content {
+  padding: 20px;
+}
+
+#main-content article {
+  margin-bottom: 20px;
+}
+
+#main-content article img {
+  max-width: 100%;
+}
+
+aside {
+  float: right;
+  width: 25%;
+  padding: 20px;
+  background-color: #f1f1f1;
+}
+
+footer {
+  background-color: #333;
+  color: #fff;
+  text-align: center;
+  padding: 20px;
 }