body{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    background-image: url(https://source.unsplash.com/1920x1080/?music,instrument,dark);
    background-repeat: no-repeat;
    overflow: auto;
    overflow-y: hidden; /* Hide vertical scrollbar */
}

 /* ********************    navigation bar  ******************** */

.main-nav{
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: white;
    background-color: #42413c7c;
    height: 5rem;
    overflow: auto;
    overflow-y: hidden; /* Hide vertical scrollbar */


}

.logo img{
    height: 70px;
    border-radius: 50%;
}


.nav-item{
    padding: 15px;
    /* background-color: aqua; */
}

.nav-item:hover{
    background-color:khaki;
    color: black;
    
}
.logo:hover{
        pointer-events: none;
}

/* main Content */

.keys {
    display: flex;
    flex: 1;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
  }
  
  .key {
    border: .4rem solid black;
    border-radius: .5rem;
    margin: 1rem;
    font-size: 1.5rem;
    padding: 1rem .5rem;
    transition: all .07s ease;
    width: 10rem;
    text-align: center;
    color: white;
    background: rgba(0,0,0,0.4);
    text-shadow: 0 0 .5rem black;
  }
  
  .playing {
    transform: scale(1.1);
    border-color: #ffc600;
    box-shadow: 0 0 1rem #e7e6e2;
  }
  
  kbd {
    display: block;
    font-size: 4rem;
  }
  
  .sound {
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: .1rem;
    color: #ffc600;
  }