body {
    background-color: black;
	justify-content: center;
	align-items: center;
	width: 100%;
	height: 100%;
}
#controls {
	width: 500px;
	height: 55px;
	display: flex;
	margin: auto auto;
	justify-content: center
}
.control_buttons {
	padding: 0% 5%;
	align-items: center;
}
.btn {
  -webkit-border-radius: 13;
  -moz-border-radius: 13;
  border-radius: 13px;
  color: #FFFFFF;
  background: #000000;
  padding: 10px 20px 10px 20px;
  border: solid #ffffff 2px;
  text-decoration: none;
}

.btn:hover {
  background: #575757;
  background-image: -webkit-linear-gradient(top, #575757, #000000);
  background-image: -moz-linear-gradient(top, #575757, #000000);
  background-image: -ms-linear-gradient(top, #575757, #000000);
  background-image: -o-linear-gradient(top, #575757, #000000);
  background-image: linear-gradient(to bottom, #575757, #000000);
  text-decoration: none;
}