html,body{
  margin:0px;
  padding:0px;
  background:black;
  overflow:hidden;
}

.sound{
  position: fixed;
  bottom: 0px;
  left: 18px;
  width: 60px;
  height: 30px;
  padding-top: 5px; 
  text-align: center;
  font-size: 14px;
  font-weight: 700;
  font-family: monospace;
  background-color: #e3e0e0;
  color: black;
  display: none;
  cursor: pointer;
}