html {
    background: #e6e9e9;
    
}

.fact, .sound{
    text-align: center;
    background: transparent;
    border: 5px solid rgba(0, 0, 0, 0.12);
    border-radius: 4px;
    display: block;
     width:50%; 
    padding:10px;
    margin: 1.3em auto;    
}

ul {
  list-style-type: none;
  margin: 0;
  padding: 20px 0 20px 50px;
  overflow: hidden;
  background-color: #333333;
color: white;

}

ul p{
    text-align: center;
}

li {
  float: left;
}

li a {
  display: block;
  color: white;
  text-align: center;
  padding: 16px;
  text-decoration: none;
}

li a:hover {
  color: #ccc;
}


body {
    background: #e6e9e9;
    color: #545454;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    margin: 0 auto;
    padding:0;
    min-width:100%; 
    
}

h1, h2, h3, h4, h5, h6 {
    color: #333;
    text-align: center;
    font-weight: 600;
    line-height: 1.3;
}

h2{
    padding:50px 0 0 0;
}

a {
    color: #f00;
    text-decoration: none;
}



img {
    background: transparent;
    border: 5px solid rgba(0, 0, 0, 0.12);
    border-radius: 4px;
    display: block;
    margin: 1.3em auto;
    max-width: 50%;
}