* {
  box-sizing: border-box;
}

body {
  padding: 0;
  margin: 0;
  background-color: rgb(5, 3, 19);
  color: #f2f2f2;
  height: 100vh;
}

#container {
  width: 100%;
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  flex-wrap: wrap;
}

.key {
  padding: 1em 1.3em;
  border: 2px solid white;
  margin: 0.4em 1em;
  cursor: pointer;
  font-size: 800;
  color: rgb(143, 21, 88);
  transition: all 0.07s;
}

.key span {
  font-weight: 900;
}

.playing {
  border: 4px solid rgb(143, 21, 88);
  box-shadow: 0px 0px 4px 4px gold;
  transform: scale(1.1a);
}