```html
body {
fontfamily: Arial, sansserif;
margin: 0;
padding: 0;
backgroundcolor: f9f9f9;
}
.container {
maxwidth: 800px;
margin: 20px auto;
backgroundcolor: fff;
padding: 20px;
borderradius: 5px;
boxshadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
h1 {
textalign: center;
color: 333;
}
img {
display: block;
maxwidth: 100%;
margin: 20px auto;
borderradius: 5px;
}