index.css

*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}


main {
    
    background-image: url('bg3.webp');
    background-repeat: no-repeat;
    background-size: cover;
    height: 98vh;
    background-position: center;

    /* background-color: black; */
}

.contain {
    height: 100%;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    align-items: center;        
    align-content: center;
    
}

.key {
    height: 80px;
    width: 6%;

    align-items: center;
    margin-left: 2%;
    background: transparent;
    border: 5px solid black;
    box-shadow: 5px 6px 10px black;
    color: wheat;
    font-size: 40px;
    transition: 0.07s;
    display: inline-flex;
    justify-content: center;
}

.key .sound {
    font-size: 9px;
    position: relative;
    bottom: -30px;
    left: -30%;
    color: rgb(199, 151, 5);
    align-items: center;
    text-align: center;

}

kbd {
    padding-left: 35%;

}

.playing {
    border: 3px solid rgb(199, 151, 5);
    transform: scale(1.1);
}

.key:hover {
    border: 3px solid rgb(199, 151, 5);
    transform: scale(1.1);
}

@media screen and (max-width: 1300px) {
    main {
        background-position: 70%;
    }

   

    .key {
        width: 9%;
        margin-top: 3%;

    }
}

@media screen and (max-width: 800px) {
   

    .key {
        width: 17%;
        /* margin-top: 5%; */
        
    }
}