@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: #bde4af;
    background-image: linear-gradient(135deg, #afd3a2 0%, #8ac6d1 74%);
}

.wrapper {
    padding: 35px 40px;
    border-radius: 20px;
    background: #141414;
}

.wrapper header {
    display: flex;
    color: #B2B2B2;
    align-items: center;
    justify-content: space-between;
}

header h2 {
    font-size: 1.6rem;
}

header .column {
    display: flex;
    align-items: center;
}

header span {
    font-weight: 500;
    margin-right: 15px;
    font-size: 1.19rem;
}

header input {
    outline: none;
}

.volume-slider input {
    accent-color: #fff;
}

.keys-checkbox input {
    height: 25px;
    width: 60px;
    cursor: pointer;
    appearance: none;
    position: relative;
    background: #4B4B4B
}

.keys-checkbox input::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 5px;
    width: 20px;
    height: 17px;
    background: #8c8c8c;
    transform: translateY(-50%);
    transition: all 0.3s ease;
}

.keys-checkbox input:checked::before {
    left: 35px;
    background: #fff;
}

.piano-keys {
    display: flex;
    list-style: none;
    margin-top: 40px;
}

.piano-keys .key {
    cursor: pointer;
    user-select: none;
    position: relative;
    text-transform: uppercase;
}

.piano-keys .black {
    z-index: 2;
    width: 46px;
    height: 140px;
    margin: 0 -22px 0 -22px;
    border-radius: 0 0 5px 5px;
    background: linear-gradient(#333, #000);
}

.piano-keys .black.active {
    box-shadow: inset -5px -10px 10px rgba(255, 255, 255, 0.1);
    background: linear-gradient(to bottom, #000, #434343);
}

.piano-keys .white {
    height: 230px;
    width: 76px;
    border-radius: 8px;
    border: 1px solid #000;
    background: linear-gradient(#fff 96%, #eee 4%);
}

.piano-keys .white.active {
    box-shadow: inset -5px 5px 20px rgba(0, 0, 0, 0.2);
    background: linear-gradient(to bottom, #fff 0%, #eee 100%);
}

.piano-keys .key span {
    position: absolute;
    bottom: 20px;
    width: 100%;
    color: #A2A2A2;
    font-size: 1.13rem;
    text-align: center;
}

.piano-keys .key.hide span {
    display: none;
}

.piano-keys .black span {
    bottom: 13px;
    color: #888888;
}

@media screen and (max-width: 815px) {
    .wrapper {
        padding: 25px;
    }

    header {
        flex-direction: column;
    }

    header :where(h2, .column) {
        margin-bottom: 13px;
    }

    .volume-slider input {
        max-width: 100px;
    }

    .piano-keys {
        margin-top: 20px;
    }

    .piano-keys .key:where(:nth-child(9), :nth-child(10)) {
        display: none;
    }

    .piano-keys .black {
        height: 100px;
        width: 40px;
        margin: 0 -20px 0 -20px;
    }

    .piano-keys .white {
        height: 180px;
        width: 60px;
    }
}

.note {
    clear:both;
    margin: 50px;
    display: flex;
    position: relative;
    align-items: center;
    justify-content: center;
    min-height: 160px;
}

.note span {
    font-family: Lucida Console;
    background-color: rgb(207, 204, 204);
}

@media screen and (max-width: 615px) {

    .piano-keys .key:nth-child(13),
    .piano-keys .key:nth-child(14),
    .piano-keys .key:nth-child(15),
    .piano-keys .key:nth-child(16),
    .piano-keys .key :nth-child(17) {
        display: none;
    }

    .piano-keys .white {
        width: 50px;
    }
}