style.css

@import url("https://fonts.googleapis.com/css2?family=Rubik:wght@300;400;500&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Crimson+Pro:wght@400;500&display=swap");
*, *::before, *::after {
  margin: 0; 
  padding: 0; 
  list-style: none; 
  outline: none; 
  box-sizing: border-box;
}
body {
  text-align: center;
  color: #222222;
}
h3 {
  text-transform: uppercase;
  font: bold 34px/120% Georgia, serif;
  padding: 1em 0 0.3em 0;
}
p {
  font: 400 16px/120% "Rubik", sans-serif;
}
.kit-container {
  background: url(background-img.png) no-repeat;
  background-size: cover;
  background-position: center;
  height: 120vh; width: 100%;
}
.kit {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-content: center;
  height: 100vh;
  color: #ffffff;
}
.kit > div {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}
kbd {
  font: 400 30px/120% "Crimson Pro", serif;
  background-color: #222222;
}
.instrument {
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
  align-items: center;
  width: 10em; height: 10em;
  margin: 1em 0 0 1em;
  font: 400 16px/120% "Rubik", sans-serif;
  border: 3px solid #314569;
  text-align: center;
  cursor: pointer;
  transition: all 0.07s;
  background: rgba(0, 0, 0, 0.4);
}
.hi-hat, .crash-cymbal {
  margin-left: 0;
}
.play {  /* animation style */
  transform: scale(1.1);
  border: 3px solid #7aa7fa;
  box-shadow: 0 0 5px #95baff;
}
@media screen and (max-width: 426px) {
  h3 {
    font-size: 24px;
  }
  p {
    font-size: 14px;
    padding: 0 1em;
  }
  kbd {
    font-size: 24px;
  }
  .instrument {
    height: 6em; width: 6em;
    font-size: 14px;
  }
}
@media screen and (max-width: 376px) {
  .instrument { 
    margin-left: 0.5em; 
  }
  .hi-hat, .crash-cymbal { 
    margin-left: 0; 
  }
}