section {
    border-top: 1px solid gray;
}
footer {
    color: gray;
    border-top: 1px solid gray;
}
footer > h1 {
   color: gray;
}
.highlight {
    color: #660000;
    background-color: #DDD;
    font-size: 12px;
    padding: 1em;
}
.highlight:hover{
   background-color: gray;
}
#selectors {
    padding: 1em;
    border: 1px solid gray;
    border-radius: 10px;
}