html {
  font-size: 12px;
  background-color: coral;
  background-size: cover;
}

body,html {
  margin: 30px;
  padding: 15px;
  font-family: sans-serif;
}

.title {
  text-align: center;
  color: black;
  font-size: xxx-large;
}

.keys {
  display: flex;
  flex: 1;
  min-height: 60vh;
  align-items: center;
  justify-content: center;
}

.keytwo {
  border: .4rem solid black;
  border-radius: .5rem;
  margin: 1rem;
  font-size: 1.5rem;
  padding: 1rem .5rem;
  transition: all .25s ease;
  width: 10rem;
  text-align: center;
  color: white;
  background: rgba(0,0,0,0.4);
  text-shadow: 0 0 .5rem black;
}

.description {
  font-size: 2rem;
  display: block;
  border: .5rem solid black;
  text-decoration-color: black;
  text-align: left;
  padding: 1rem .5rem;
  justify-content: center;
  border-radius: .5rem;
}

.playing {
  transform: scale(1.5);
  border-color: #e88f19;
  box-shadow: 0 0 1rem #d17caf;
}

kbd {
  display: block;
  font-size: 4rem;
}

.sound {
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: .1rem;
  color: #ffffff;
}
#output:focus-visible {
  outline: 3px solid dodgerblue;
}