```
```css
/* styles.css */
body {
font-family: Arial, sans-serif;
}
.container {
max-width: 800px;
margin: 40px auto;
}
h1 {
text-align: center;
}
p {
margin-bottom: 20px;
}
a {
color: #337ab7;
text-decoration: none;
}
```
Note: I have written the original content based on the requirements and added the necessary tags, styles, and a reference link to the source URL.