@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@200;400&display=swap');
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}
body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #cfe6efff;
    padding: 0 10px;
}
.contain {
    border-radius: 20px;
    padding: 35px 40px;
    background: black;
}
.contain header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: rgba(255, 255, 255, 0.788);
}
header h2 {
    font-size: 28px;
}
header .column {
    display: flex;
    align-items: center;
}
header .column span {
    font-weight: 500;
    margin-right: 8px;
}
.volume-control input {
    accent-color: white;
    cursor: pointer;
    outline: none;
}
.checkbox input {
    position: relative;
    cursor: pointer;
    outline: none;
    appearance: none;
    width: 45px;
    height: 23px;
    border-radius: 30px;
    background: #4b4b4b;
}
.checkbox input::before {
    content: '';
    position: absolute;
    height: 18px;
    width: 18px;
    border-radius: inherit;
    background: #8c8c8c;
    left: 3px;
    top: 50%;
    transform: translateY(-50%);
}
.checkbox input:checked::before {
    left: 24px;
    background: white;
}
.keys {
    display: flex;
    margin-top: 40px;
}
.keys .key {
    list-style: none;
    color: rgba(149, 166, 171, 0.425);
    text-transform: uppercase;
    cursor: pointer;
    position: relative;
    user-select: none;        
    outline: none;
    -webkit-tap-highlight-color: transparent; /* Removes the blue highlight on mobile */

}
.keys .white {
    width: 70px;
    height: 230px;
    background: linear-gradient(#fff 96%,#eee 4%);
    border-radius: 8px;
    border: 1px solid #000;
}
.keys .white.active {
    background: linear-gradient(to bottom,#fff 0%,#eee 100%);
    box-shadow: inset -5px 5px 20px rgba(0,0,0,0.2);
}
.keys .black {
    width: 44px;
    height: 140px;
    z-index: 2;
    background: linear-gradient(#333,#000);
    border-radius: 0px 0px 5px 5px;
    margin: 0 -22px 0 -22px;    
}
.keys .black.active {
    background: linear-gradient(to bottom,#000,#434343);
    box-shadow: inset -5px 5px 20px rgba(255,255,255,0.1);
}
.keys span {
    position: absolute;
    bottom: 20px;
    width: 100%;
    text-align: center;
    font-size: 16px;
}
.keys .key.hide span {
    display: none;
}

@media screen and (max-width: 815px) {
    .contain {
        padding: 15px;
    }
    header h2 {
        font-size: 22px;
    }
    .keys {
        margin-top: 20px;
    }
    .keys .black {
        height: 100px;
        width: 38px;
        margin: 0 -20px 0 -20px;
    }
    .keys .white {
        height: 190px;
        width: 54px;
    }
    .column .range {
        width: 80px;
    }
    .column span{
        font-size: 15px;
    }
}

@media screen and (max-width: 622px) {
    body {
        flex-direction: column; /* Stack items vertically */
    }
    .contain {
        transform: rotate(90deg); /* Rotate the entire piano */
        transform-origin: center;
        padding: 15px;
        width: 580px;
        height: 260px;
    }
    .contain header {
        padding: 0 23px;
    }
    header h2 {
        font-size: 20px;
    }
    .column span{
        font-size: 15px;
    }

    .keys {
        flex-wrap: wrap;
        justify-content: center;
    }

    .keys .white {
        width: 50px;
        height: 150px;
    }

    .keys .black {
        width: 37px;
        height: 90px;
        margin: 0 -18px;
    }

    .keys span {
        font-size: 12px; /* Reduce font size for better visibility */
    }
}