html {
  background-color: #f7f7f7;
}

body {
  color: #333;
  font-family: "Open Sans", sans-serif;
  font-weight: 300;
  line-height: 1.6;
  margin: 40px auto;
  max-width: 650px;
  padding: 0 10px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: inherit;
}

header {
  text-align: center;
}

header,
section p {
  cursor: default;
}

nav ul {
  display: table;
  list-style: none;
  margin-left: auto;
  margin-right: auto;
  padding: 0;
}
nav ul li {
  display: inline-block;
}
nav ul li a {
  font-size: 90%;
  padding-left: 10px;
  padding-right: 10px;
}

a {
  color: #646464;
  padding: 7px 3px;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

a.external {
    background-position: center right;
    background-repeat: no-repeat;
    padding-right: 13px !important;
    /* external links */
}

p,
ul {
  margin-top: 40px;
}

p span {
  padding: 1px 2px;
}
p span:hover {
  background-color: #e9e9e9;
}