.contenedor-piano {
  margin-top: 25px;
  display: flex;
  justify-content: center;
}
.piano {
  display: flex;
  position: relative;
  background-color: #000;
  padding: 8px;
  border-radius: 6px;
}
.tecla {
  cursor: pointer;
  position: relative;
}
.tecla.blanca {
  background: #fff;
  width: 50px;
  height: 150px;
  border: 1px solid #ccc;
  border-radius: 0 0 4px 4px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 8px;
  box-sizing: border-box;
  z-index: 1;
}
.tecla.blanca span {
  color: #333;
  font-size: 0.7rem;
  text-align: center;
  line-height: 1.2;
}
.tecla.blanca:active, .tecla.blanca.activa { background: #ddd; }
.tecla.negra {
  background: #222;
  width: 30px;
  height: 95px;
  margin-left: -15px;
  margin-right: -15px;
  z-index: 2;
  border-radius: 0 0 3px 3px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 6px;
  box-sizing: border-box;
}
.tecla.negra span { color: #fff; font-size: 0.65rem; }
.tecla.negra:active, .tecla.negra.activa { background: #ff0055; }
kbd {
  background-color: rgba(0,0,0,0.06);
  border: 1px solid rgba(0,0,0,0.15);
  border-radius: 2px;
  padding: 0px 3px;
  font-weight: bold;
}
.tecla.negra kbd {
  background-color: rgba(255,255,255,0.15);
  border: 1px solid #444;
}