html {
  font-size: 10px;
  background-color:#f31478a8;
}

body,html {
  margin: 0;
  padding: 0,0.5rem;
  font-family: sans-serif;
}

.description {
  top: 0;
  left: 0;
  margin-right: auto;
  margin-left: auto;
  text-align: center;
  font-size: 2rem;
  color: white;
}

.keys {
  display: flex;
  flex: 1;
  flex-wrap: wrap;
  align-items:center;
  justify-content:space-evenly;
}

.key {
  border: .4rem solid black;
  border-radius: .5rem;
  margin: 1rem;
  font-size: 1.5rem;
  padding: 1rem .5rem;
  transition: all .07s ease;
  width: 10rem;
  text-align: center;
  color: white;
  background: rgba(255, 255, 255, 0.3);
  text-shadow: 0 0 .5rem black;
}

.key:hover{
    background: rgba(255, 255, 255, 0.5);
}

.playing {
  transform: scale(1.1);
  border-color: #ffc600;
  box-shadow: 0 0 1rem #ffc600;
}

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

.sound {
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: .1rem;
  color: #ffffff;
}

@media(max-width: 600px) {
  .key {
    width: 8rem;
    font-size: 1.2rem;
  }
  
  .description {
    font-size: 1.5rem;
  }
  
  kbd {
    font-size: 3rem;
  }
  
  .sound {
    font-size: 1rem;
  }
  .keys {
    flex-direction: column;
    align-items: center;
    flex-wrap: wrap;
  }
}