style.css

* {
	padding:0;
	margin:0;
  text-align: left;
  font-family: Helvetica;
	color:#fff;
  list-style-type: none;
}

body {
margin: 0;
text-align: left;
font-family: sans-serif;
display: grid;
grid-gap: 0;
grid-template-columns:1fr 1fr 1fr 1fr 1fr ;
grid-template-rows: 1fr 1fr 1fr 1fr;
background-image: url(back.gif);
background-size: cover;
height: 100vh;
letter-spacing: normal;
margin: 0;
overflow: hidden;
justify-content: center;
align-items: center;
}
label, input {
  font-size: large;
  margin: 5px;
}
input[type=range], input[type=checkbox] {
  accent-color: #eee;
}
#controls {
  grid-area:1/1/6/1;
  z-index: 9999;
  margin-bottom: 20px;
  background-color: rgba(0, 0, 0, 0.7);
  border-radius: 10px;
}

#controls > div {
  z-index: 9999;
  display: block;
  margin: 10px;
}
aside{
  grid-area:2/6/3/1;
  width: 100%;
  padding: 0  0 3% 0;
  text-align: center;
}

nav{
  z-index: 9999;
  grid-area:2/3/3/3;
  justify-content: center;
  align-items: center;
}

main{
  z-index: 9999;
  grid-area:3/3/3/3;
  justify-content: center;
  align-items: center;
}

#piano-keyboard {
display: flex;
align-items: flex-start;
height: 200px;
}

.white-key, .black-key {
  border: 1px solid black;
  cursor: pointer;
  user-select: none;
}

.white-key {
  width: 40px;
  height: 200px;
  background: white;
}

.black-key {
  width: 25px;
  height: 120px;
  background: black;
  margin-left: -12.5px;
  margin-right: -12.5px;
  z-index: 1;
}

h1 {
  font: normal 7em georgia;
  letter-spacing: 0.2px; 
  font-weight: lighter;
  text-align: center;
}
p { 
  font-family: helvetica;
  text-align: center;
  letter-spacing: 0.2px; 
  font-weight: lighter;
	}

@media screen and (max-width: 500px) {
}