html, body {
  margin: 0;
  padding: 0;
  background-color: #000;
  line-height: 1.4;
}
a:link, a:visited, a:hover {
  color: #fff;
  text-decoration: none;
}
.body {
  max-width: 800px;
  padding: 40px;
  margin: 0 auto;
}
body {
  font-family: 'Lato', sans-serif;
}
#demo-1 {
  position: relative; /* can either be relative, absolute or fixed. If position is not set (i.e. static), it would be set to "relative" by script */
  overflow: hidden; /* to bound the empty top space created by inner element's top margin */
  background-color: #000;
  width: 100%;
}
.tab {
  color: #000;
  background-color: #fff;
  -moz-border-radius: 5px;
  -webkit-border-radius: 5px;
  border-radius: 5px;
  padding: 20px;
  margin-top: 20px;
  margin-right: 100px;
  margin-left: 100px;
  margin-bottom: 20px;
  -webkit-box-shadow: 0px -100px 100px #000;
  box-shadow: 0px -100px 100px #000;
  max-width: 1000px;
}
.tabgris {
  background-color: #abb8c3;
  -moz-border-radius: 5px;
  -webkit-border-radius: 5px;
  border-radius: 5px;
  padding: 20px;
  margin-top: 20px;
  margin-right: 100px;
  margin-left: 100px;
  margin-bottom: 20px;
  opacity: 0.8;
}
.tabgris a:link, a:visited, a:hover {
  color: #000;
}
.blanc {
  color: #FFFFFF;
}