@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;700&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}

body {
  background-color: #ebebeb;
}
.piano {
  background-color: #121212;
  width: 1000px;
  height: 400px;
  margin: 100px auto 0;
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
}
.controls {
  color: rgba(255, 255, 255, 0.8);
  padding: 30px;
  display: flex;
  width: 100%;
  justify-content: space-between;
}
.controls h1 {
  font-weight: 500;
  font-size: 1.4ren;
}
.switcher {
  width: 50px;
  height: 25px;
  background-color: #555;
  display: flex;
  border-radius: 50px;
  padding: 4px;
}
.switcher-button {
  height: 100%;
  aspect-ratio: 1/1;
  background-color: #ddd;
  border-radius: 25px;
}
.switcher-active {
  background-color: #006eff;
  justify-content: flex-end;
}
.checkbox-label {
  display: flex;
  gap: 15px;
}
.piano-keys {
  width: 100%;
  height: 300%;
  background-color: #181818;
  border-radius: 15px;
  padding: 30px 40px;
  display: flex;
}
.white {
  background-color: white;
  flex-grow: 1;
  border-radius: 5px;
  border-bottom: 8px solid #ddd;
  color: rgba(0, 0, 0, 0.3);
  margin-left: -17px;
  z-index: 1;
}

.black {
  width: 40px;
  background: linear-gradient(black, #333);
  height: 150px;
  border-radius: 0 0 5px 5px;
  border-bottom: 8px solid #222;
  margin-left: -20px;
  z-index: 2;
  color: rgba(255, 255, 255, 0.3);
}

.key span {
  font-weight: 600;
  position: absolute;
  transition-duration: 300ms;
}
.key {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 8px;
  user-select: none;
}
.piano-keys .white:nth-child(1) {
  margin-left: 0;
}
.piano-keys .white:nth-child(5) {
  margin-right: 20px;
}
.piano-keys .white:nth-child(12) {
  margin-right: 20px;
}
.piano-keys .white:nth-child(17) {
  margin-right: 20px;
}

.black-pressed {
  background: linear-gradient(#222, black);
  border-bottom: node;
  height: 148px;
}
.disabled-keys span {
  opacity: 0;
}