body {
margin:40px auto;
max-width:650px;
line-height:1.6;
font-size:18px;
color:#444;
padding:0 10px;
}
h1,h2,h3 {
line-height:1.2;
.navbar {
display:flex;
justify-content: space-around;
a {
text-decoration: none;
color: inherit;
a:hover {
text-decoration: underline;