* {
  margin: 0px;
  padding: 0px;
  box-sizing: border-box;
}

body {
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: url("./pexels-pixabay-326311.jpg");
  background-position: center center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
}

.keys {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 100px;
}

.key {
  position: relative;
  color: rgb(255, 255, 255);
  background-color: rgba(0, 0, 0, 0.5);
  flex-direction: column;
  border: 1px solid rgba(0, 0, 0, 0.527);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
  width: 100px;
  font-size: 18px;
  letter-spacing: 1px;
  margin: 5px;
  transition: all ease-in-out 0.2s;
  cursor: pointer;
  transform: scale(1);
}

.key:hover {
  transform: scale(1.1);
  color: red;
}

span {
  color: white;
  margin-top: 13px;
}

.playing {
  transform: scale(1.1);
  border: 3px solid gold;
  transition: all ease-in-out 0.07s;
}