html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
  margin: 0;
  padding: 0;
  border: 0;
  font: inherit;
  font-size: 100%;
  vertical-align: baseline;
}

html {
  line-height: 1;
}

ol, ul {
  list-style: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

caption, th, td {
  text-align: left;
  font-weight: normal;
  vertical-align: middle;
}

q, blockquote {
  quotes: none;
}
q:before, q:after, blockquote:before, blockquote:after {
  content: "";
  content: none;
}

a img {
  border: none;
}

article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section, summary {
  display: block;
}
html, body {
  background: #999;
  width: 100%;
  height: 100%;
  font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
  font-weight: 300;
}

.wrapper {
  width: 100%;
  height: 100%;
}
.wrapper .menu-icon span {
  -webkit-transition: background 0.4s ease-out, margin-bottom 0.2s, margin-top 0.2s, opacity 0.4s ease-out;
  -webkit-transition-delay: 0.2s, 0s, 0s, 0s;
  -moz-transition: background 0.4s ease-out 0.2s, margin-bottom 0.2s, margin-top 0.2s, opacity 0.4s ease-out;
  -o-transition: background 0.4s ease-out 0.2s, margin-bottom 0.2s, margin-top 0.2s, opacity 0.4s ease-out;
  transition: background 0.4s ease-out 0.2s, margin-bottom 0.2s, margin-top 0.2s, opacity 0.4s ease-out;
}
.wrapper.active .menu-icon span {
  -webkit-transition: background 0.4s ease-out, opacity 0.4s ease-out;
  -webkit-transition-delay: 0.6s, 0.6s;
  -moz-transition: background 0.4s ease-out 0.6s, opacity 0.4s ease-out 0.6s;
  -o-transition: background 0.4s ease-out 0.6s, opacity 0.4s ease-out 0.6s;
  transition: background 0.4s ease-out 0.6s, opacity 0.4s ease-out 0.6s;
  background: #ffffff;
}
.wrapper.active nav {
  top: 0;
  height: 100%;
}
.wrapper.active nav .menu-list-container {
  opacity: 1;
}
.wrapper.active .main-container {
  -webkit-transform: scale(0.8, 0.8);
  -moz-transform: scale(0.8, 0.8);
  -ms-transform: scale(0.8, 0.8);
  -o-transform: scale(0.8, 0.8);
  transform: scale(0.8, 0.8);
}

.main-container {
  width: 100%;
  height: 100%;
  background: url("http://placeimg.com/640/480/any") no-repeat center center fixed white;
  -moz-background-size: cover;
  -webkit-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  -webkit-transition: all 0.3s ease-out;
  -moz-transition: all 0.3s ease-out;
  -o-transition: all 0.3s ease-out;
  transition: all 0.3s ease-out;
}
.main-container .content {
  position: relative;
  width: 100%;
  height: 100%;
}
.main-container .content .text {
  padding: 10px 20px;
  font-size: 32px;
  letter-spacing: 3px;
  background: #333333;
  color: #ffffff;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  -moz-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  -o-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
}

.menu-icon-container {
  position: absolute;
  top: 20px;
  right: 10%;
  z-index: 9999;
}

nav {
  background: rgba(33, 33, 33, 0.9);
  color: #ffffff;
  position: absolute;
  top: 100%;
  width: 100%;
  height: 0;
  left: 0;
  z-index: 1000;
  overflow: hidden;
  -webkit-transform: translate(0, 0);
  -moz-transform: translate(0, 0);
  -ms-transform: translate(0, 0);
  -o-transform: translate(0, 0);
  transform: translate(0, 0);
  -webkit-transition: all 0.4s ease-out;
  -webkit-transition-delay: 0.3s;
  -moz-transition: all 0.4s ease-out 0.3s;
  -o-transition: all 0.4s ease-out 0.3s;
  transition: all 0.4s ease-out 0.3s;
}
nav .menu-list-container {
  position: absolute;
  top: 50%;
  width: 100%;
  opacity: 0;
  -webkit-transition: opacity 0.4s ease-out;
  -webkit-transition-delay: 0.3s;
  -moz-transition: opacity 0.4s ease-out 0.3s;
  -o-transition: opacity 0.4s ease-out 0.3s;
  transition: opacity 0.4s ease-out 0.3s;
}
nav .menu-list-container ul {
  -webkit-transform: translate(0, -50%);
  -moz-transform: translate(0, -50%);
  -ms-transform: translate(0, -50%);
  -o-transform: translate(0, -50%);
  transform: translate(0, -50%);
  width: 100%;
}
nav .menu-list-container ul li {
  width: 100%;
  text-align: center;
  font-size: 24px;
  margin-bottom: 20px;
}
.demo {
  margin: auto;
  margin-top: 60px;
  padding: 75px 0 10px;
  width: 22px;
}

.menu-icon {
  display: block;
  float: left;
  cursor: pointer;
  -webkit-transition: all 0.2s ease-in;
  -moz-transition: all 0.2s ease-in;
  -o-transition: all 0.2s ease-in;
  transition: all 0.2s ease-in;
}
.menu-icon span {
  display: block;
  width: 22px;
  height: 4px;
  background: #333333;
  margin-bottom: 2px;
  border-radius: 1px;
  -webkit-transition: all 0.4s ease-out;
  -moz-transition: all 0.4s ease-out;
  -o-transition: all 0.4s ease-out;
  transition: all 0.4s ease-out;
}
.menu-icon span.bar1 {
  margin-top: 2px;
}
.menu-icon:hover span {
  margin-bottom: 4px;
}
.menu-icon:hover span.bar1 {
  margin-top: 0px;
}
.menu-icon.active {
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  transform: rotate(-45deg);
}
.menu-icon.active:hover span {
  margin-top: 2px;
  margin-bottom: 2px;
}
.menu-icon.active .bar1 {
  -webkit-transform: rotate(0deg) translateY(6px);
  -moz-transform: rotate(0deg) translateY(6px);
  -ms-transform: rotate(0deg) translateY(6px);
  -o-transform: rotate(0deg) translateY(6px);
  transform: rotate(0deg) translateY(6px);
}
.menu-icon.active .bar2 {
  opacity: 0;
}
.menu-icon.active .bar3 {
  -webkit-transform: rotate(-90deg) translateX(5px);
  -moz-transform: rotate(-90deg) translateX(5px);
  -ms-transform: rotate(-90deg) translateX(5px);
  -o-transform: rotate(-90deg) translateX(5px);
  transform: rotate(-90deg) translateX(5px);
}