style.css

html, body {
  height: 100%;
  padding: 0;
  background-color: #000;
  margin: 0;
  position: relative;
}

kalimba_body {
  display: flex;
  justify-content: center;
  align-items: center;
}

#kalimba {
  display: flex;
  justify-content: space-around;
  height: 430px;
  width: 300px;
  background-color: #c26f43;
  border-radius: 20px;
  position: relative;
  box-shadow: 10px 10px 25px #000, inset 5px 5px 10px rgba(255, 255, 255, 0.4), inset -5px -5px 10px rgba(0, 0, 0, 0.4);
}

.logo {
  position: absolute;
  bottom: 100px;
  text-align: center;
  text-align: center;
  text-transform: uppercase;
  /*font-family: "Arial Black", sans-serif;*/
  font-size: 90%;
  font-weight: bold;
  color: #222222;
  text-shadow: 2px 2px 3px rgba(255, 255, 255, 0.2);
}

.key {
  margin-top: 20px;
  width: 12px;
  height: 130px;
  border-radius: 5px;
  background-color: #ADA097;
  box-shadow: 5px 5px 20px #000;
  z-index: 10;
  font-size: 100%;
  position: relative;
}

.key-text {
  display: flex;
  vertical-align: bottom;
  position: absolute;
  bottom: 10%;
  text-align: center;
  font-weight: bold;
  color: #222222;
  text-shadow: 2px 2px 3px rgba(255, 255, 255, 0.2);
  z-index: 30;
  line-height: 0.6;
  font-size: 80%;
}

.key:first-child {	
  margin-left: 15px;	
}	

.key.last-key {	
  margin-right: 15px;
}

.key[data-note=C4] {
  height: 230px;
  background-color: #d94251; 
}

.key[data-note=D4] {
  height: 220px;
}

.key[data-note=E4] {
  height: 210px;
}

.key[data-note=F4] {
  height: 202px;
}

.key[data-note=G4] {
  height: 195px;
}

.key[data-note=A4] {
  height: 185px;
  background-color: #d94251; 
}

.key[data-note=B4] {
  height: 177px;
  background-color: #d94251; 
}

.key[data-note=C5] {
  height: 170px;
}

.key[data-note=D5] {
  height: 165px;
}

.key[data-note=E5] {
  height: 155px;
}

.key[data-note=F5] {
  height: 150px;
}

.key[data-note=G5] {
  height: 145px;
  background-color: #d94251; 
}

.key[data-note=A5] {
  height: 140px;
  background-color: #d94251; 
}

.key[data-note=B5] {
  height: 135px;
}

.key-[data-note=C6] {
  height: 132px;
}

.key[data-note=D6] {
  height: 130px;
}

.key[data-note=E6] {
  height: 123px;
}

top-pad {
  position: absolute;
  width: 290px;
  background-color: #c26f43;
  background-color: #ADA097;
  display: flex;
  align-items: center;
  justify-content: space-around;
  top: 60px;
  border-radius: 7px;
  height: 15px;
  box-shadow: 5px 5px 25px #000, inset 5px 5px 25px rgba(255, 255, 255, 0.5), inset -5px -5px 25px rgba(0, 0, 0, 0.5);
  z-index: 20;
}

bottom-pad {
  position: absolute;
  width: 280px;
  background-color: #c26f43;
  top: 30px;
  height: 15px;
  border-radius: 5px;
  box-shadow: 2px 2px 5px #000, inset 5px 5px 15px rgba(255, 255, 255, 0.3), inset -5px -5px 15px rgba(0, 0, 0, 0.3);
}

bottom-pad.last-pad {
  top: 90px;
}

.key:hover {
  background-color: #e6e3e3;
}

.key:active {
  background-color: #42a1f5;
}

.key_active {
  background-color: #42a1f5 !important;
}

animation_body {
  display: flex;
  justify-content: center;
  align-items: center;
}

key-note-animation {
  position: relative;
  margin-bottom: 200px;
  margin-top: 50px;
  right: 143px;
  right: 150px;
  top: 80px;
  z-index: 20;
}

[data-key-note] {
  pointer-events: none;
  width: 12px;
  height: 30px;
  margin: 1px;
  background-color: #42a1f5;
  font-size: 14px;
  position: absolute;
  animation-name: key-note-animation;
  animation-duration: 2s;
  animation-iteration-count: 1;
  animation-fill-mode: forwards;
  animation-timing-function: linear;
  border-radius: 5px;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
}

[data-key-note=D6] {
  left: 15px;
}

[data-key-note=B5] {
  left: 31px;
}

[data-key-note=G5] {
  left: 47px;
}

[data-key-note=E5] {
  left: 63px;
}

[data-key-note=C5] {
  left: 79px;
}

[data-key-note=A4] {
  left: 95px;
}

[data-key-note=F4] {
  left: 111px;
}

[data-key-note=D4] {
  left: 127px;
}

[data-key-note=C4] {
  left: 142px;
}

[data-key-note=E4] {
  left: 158px;
}

[data-key-note=G4] {
  left: 174px;
}

[data-key-note=B4] {
  left: 190px;
}

[data-key-note=D5] {
  left: 206px;
}

[data-key-note=F5] {
  left: 222px;
}

[data-key-note=A5] {
  left: 238px;
}

[data-key-note=C6] {
  left: 254px;
}

[data-key-note=E6] {
  left: 269px;
}

[data-key-note=C-1] {
  display: none;
}

@keyframes key-note-animation {
  0% {
    opacity: 0;
    background-color: #42a1f5;
  }
  10% {
    opacity: 1;
    background-color: #42a1f5;
  }
  90% {
    opacity: 1;
    background-color: #42a1f5;
  }
  /*90% {
    background-color: #e7f326;
  }*/
  100% {
    opacity: 0;
    transform: translateY(200px);
  }
}