html {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 62.5%;
}

body {
  height: 100%;
  background: rgb(255, 255, 255) url('../images/bg@2x.png') repeat-x left top;
  background-size: 60px 290px;
  font: 100% Helvetica;
  color: rgb(0, 0, 0);
}

header {
  width: 100%;
  margin: 0 auto;
  border-bottom: 1px solid #c0c0c0;
}

header .header-center {
  position: relative;
  width: 820px;
  height: 68px;
  margin: 0 auto;
}

header .nav-logo {
  display: block;
  position: absolute;
  top: 0;
  bottom: 0;
  right: 708px;
  z-index: 31;
  width: 92px;
  height: auto;
  margin: auto 0;
  overflow: hidden;
}

header nav {
  position: absolute;
  top: 0;
  left: 146px;
  z-index: 30;
  width: 654px;
  height: 68px;
}

header nav .section {
  display: block;
  float: left;
  height: 67px;
  min-height: 20px;
  padding-top: 21px;
  padding-right: 15px;
  padding-left: 15px;
  border-top: 6px solid rgb(161, 159, 159);
  font-size: 1.4rem;
  font-weight: 400;
  line-height: 1.38;
  text-align: center;
  color: rgb(80, 80, 80);
  text-transform: uppercase;
}

header nav .section.active {
  border-top: 6px solid rgb(0, 0, 0);
  color: rgb(0, 0, 0);
}

header nav a:hover {
  border-top-color: #858585;
}

header nav .fork-us {
  display: block;
  float: right;
  height: 67px;
  min-height: 20px;
  padding-top: 21px;
  padding-left: 22px;
  border-top: 6px solid rgb(161, 159, 159);
  background: url('../images/fork@2x.png') no-repeat left center;
  background-size: 15px 20px;
  font-size: 1.4rem;
  font-weight: 400;
  line-height: 1.38;
  text-align: right;
  color: rgb(80, 80, 80);
  text-transform: uppercase;
}

.page {
  width: 820px;
  margin: 0 auto;
}

footer {
  width: 100%;
  margin: 80px auto 0;
  border-top: 1px solid rgb(192, 192, 192);
}

footer .footer-center {
  position: relative;
  width: 820px;
  height: 50px;
  margin: 0 auto;
}

footer .github {
  display: block;
  position: absolute;
  top: 0;
  bottom: 0;
  right: 75px;
  z-index: 1;
  width: 30px;
  height: 30px;
  margin: auto 0;
  background: url('../images/github@2x.png') no-repeat center center;
  background-size: 30px 26px;
}

footer .twitter {
  display: block;
  position: absolute;
  top: 0;
  bottom: 0;
  right: 20px;
  width: 30px;
  height: 30px;
  margin: auto 0;
  background: url('../images/twitter@2x.png') no-repeat center center;
  background-size: 30px 25px;
}

footer .copyright {
  display: block;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 20px;
  z-index: 2;
  width: 400px;
  height: 22px;
  margin: auto 0;
  font-size: 1.3em;
  font-weight: 400;
  line-height: 1.38;
  color: rgb(192, 192, 192);
}