html, body{
     max-width:100%;
     max-height:100%;
     overflow-x:hidden;
     font-family: verdana, Geneva, Tahoma, sans-serif;
     font-size: 14px;
}

audio{
  width: 100%;
}

article{
  padding: 0 10px;
}

h1{
  text-align: center;
}