* {
  margin: 0;
  padding: 0;
  list-style: none;
  border: 0;
}

body {
  background: #333;
  color: #fff;
  margin-top: 50px;
  margin-bottom: 50px;
}

a {color: #fff;
  text-decoration: none;}
a:active {color: #fff}
a:visited {color: #777}

ul {
  margin-left: 5%;
  margin-right: auto;
}

li {
  display: inline;
  text-align: left;
  float: left;
  width: 100%;
  background: #333;
  margin-top: 6px;
  margin-bottom: 6px;
}

span {
  display: block;
  float: none;
  padding-top: 1px;
  padding-bottom: 1px;
}

.mtytle{
  margin-top: 100px;
  margin-bottom: 30px;
}