style.css

body {
  height: 100vh;
  padding: 0px;
  margin: 0px;
}
.container {
  width: 100vw;
  height: 100vh;
  background-image: url("background.jpeg");
  background-size: cover;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}
.beatbox {
  width: 600px;
  height: 600px;
  background-color: #333333;
  border-radius: 20px;
  display: flex;
  flex-direction: row;
  justify-content: space-evenly;
  align-items: center;
  flex-wrap: wrap;
}
.beat {
  color: white;
  border: 1px solid #333333;
  width: 150px;
  height: 150px;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}
.button {
  width: 120px;
  height: 120px;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  font-size: 2em;
  border-radius: 5px;
  transition: 0.3s all;
}
.aqua {
  border: 5px solid aqua;
}
.purple {
  border: 5px solid #ff00ff;
}
.white {
  border: 5px solid white;
}