html {
    box-sizing: border-box;
}

*, *::before, *::after {
    box-sizing: inherit;
}

#piano {
    background-color: #00471b;
    width: 992px;
    height: 290px;
    margin: 80px auto;
    padding: 90px 20px 0 20px;
    position: relative;
    border-radius: 10px;
}

.keys {
    background-color: #040404;
    width: 949px;
    height: 180px;
    padding-left: 2px;
    overflow: hidden;
}

.key {
    background-color: #ffffff;
    position: relative;
    width: 41px;
    height: 175px;
    margin: 2px;
    float: left;
    border-radius: 0 0 3px 3px;
}

.key.black--key::after {
    background-color: #1d1e22;
    content: "";
    position: absolute;
    left: -18px;
    width: 32px;
    height: 100px;
    border-radius: 0 0 3px 3px;
}

.logo {
    width: 200px;
    position: absolute;
    top: 23px;
}

@media (max-width: 768px) {
    #piano {
        width: 358px;
    }

    .keys {
        width: 318px;
    }

    .logo {
        width: 150px;
    }
}

@media (max-width: 1199px) and (min-width: 769px) {
    #piano {
        width: 675px
    }

    .keys {
        width: 633px
    }
}