body {
    color: #111111;
    margin: 0 auto;
    max-width: 700px;
    width: 80%;
}
header {
    text-align: center;
}
ul {
    background-color: #EFEFEF;
    padding: .5em;
    text-align: left;
}
li {
    background-color: #FFFFFF;
    list-style-type: none;
    margin: .25em;
    padding: 1em;
}
.horizontal {
    display: inline-block;
}