* { transition: all 170ms ease-out; }

body {
    background-color: #F5F5F5;
    max-width: 700px;
    margin: 0 auto;
}

header h1 {
    text-align: center;
}

nav {
    display: block;
    list-style: none;
}

ul {
    display: flex;
    margin: 0 0 32px 0;
    padding: 0;
    justify-content: center;
}

li {
    display: inline;
    background-color: #fcfafa;
    margin: 2px;
    padding: 3px 6px;
    border-radius: 3px;
    box-shadow: 0 0 4px rgba(15, 15, 15, 0.08);
}

li:hover {
    background-color: #212121;
    box-shadow: 0 1px 5px rgba(15, 15, 15, 0.16);
}

li:hover a { color: #DDE1E7; }

a { text-decoration: none; }

.content {
    font-family: sans-serif;
    font-size: 1em;
    color: #212121;
}

#thumbnail {
    width: 200px;
    height: 150px;
}