* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Helvetica Neue', sans-serif;
}

body {
  background: #1d1c1c;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  color: white;
}

.container {
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 8px;
}

header p {
  font-size: 1.2rem;
  color: #bfbfbf;
  margin-bottom: 50px;
}

.piano {
  display: flex;
  position: relative;
  user-select: none;
}

.key.white {
  width: 60px;
  height: 210px;
  background: #cfcdcd;
  color: #939292;
  border: 2px solid #bfbfbf;
  border-bottom: 6px solid #a6a6a6;
  border-radius: 5px;
  margin: 0 2px;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-end;
  padding-bottom: 10px;
  font-weight: 400;
  font-size: 14px;
  cursor: pointer;
  transition: 0.1s;
}

.key.black {
  width: 40px;
  height: 120px;
  background: #181717;
  color: rgb(152, 145, 145);
  position: absolute;
  top: 0;
  z-index: 2;
  border-radius: 0 0 5px 5px;
  display: flex;
  justify-content: center;
  align-items: flex-end;
  padding-bottom: 6px;
  font-weight: 400;
  font-size: 13px;
  cursor: pointer;
  transition: 0.1s;
  box-shadow: 0 0 15px rgba(0,0,0,0.7);
}

.keyboard-wrapper {
  border-radius: 18px;
  padding: 20px;
  display: inline-block;
  background: #252323;      
  box-shadow: 0 0 35px rgba(0,0,0,0.7);
}

.key.black[data-key="w"] { left: 2.8rem; }
.key.black[data-key="e"] { left: 6.8rem; }
.key.black[data-key="t"] { left: 14.8rem; }
.key.black[data-key="y"] { left: 18.8rem; }
.key.black[data-key="u"] { left: 22.8rem; }
.key.black[data-key="o"] { left: 30.8rem; }
.key.black[data-key="p"] { left: 34.8rem; }

.key.active {
  scale: 0.98;
  transform: translateY(3px);
}

.key span {
  opacity: 0;
  transform: translateX(-15px);
  transition: 0.25s ease;
  pointer-events: none;
}

.key span.show {
  opacity: 1;
  transform: translateX(0);
  color: #968f8f;
}