html,
body {
  overflow: hidden;
  height: 100%;
}

body {
  position: relative;
  overflow: hidden;
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  font-family: "Helvetica Neue", Helvetica, "Lucida Grande", Arial,
    "Hiragino Sans GB", "\5FAE\8F6F\96C5\9ED1", "WenQuanYi Micro Hei", STHeiti,
    SimSun, sans-serif;

  background: #e9e9e9 url(bg.jpg) 50% 0;
  -webkit-animation: flow 16s linear infinite;
  -moz-animation: flow 16s linear infinite;
  animation: flow 16s linear infinite;
}

#wrapper {
  position: absolute;
  top: 50%;
  left: 50%;
  margin-top: -60px;
  margin-left: -250px;
  width: 500px;
  height: 120px;
  text-align: center;
}

/* April fools! */
/*
* {
    text-shadow: -3px 0 1px cyan, 3px 0 1px red;
}
*/

input[type="button"],
input[type="submit"],
input[type="reset"],
input[type="text"],
input[type="password"] {
  -webkit-appearance: none;
}
textarea {
  -webkit-appearance: none;
}

#wrapper h1 {
  margin: 0 0 20px;
  padding: 0;
  font-weight: 400;
  font-size: 40px;
}

#start {
  width: 150px;
  height: 50px;
  vertical-align: middle;
  cursor: pointer;
  font-size: 30px;

  border: none;
  border-radius: 3px;
  color: white;
  display: inline-block;
  background-color: #008cba;
}

.temp {
  position: absolute;
  z-index: -1;
  color: #777;
}

@-webkit-keyframes flow {
  0% {
    background-position: 0% 0;
  }
  100% {
    background-position: 50% -250px;
  }
}
@-moz-keyframes flow {
  0% {
    background-position: 0% 0;
  }
  100% {
    background-position: 50% -250px;
  }
}
@keyframes flow {
  0% {
    background-position: 0% 0;
  }
  100% {
    background-position: 50% -250px;
  }
}