/* fonte importada do Google font -  Poppins */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wht@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;
    padding: 0 10px;
    background-color: #e3f2fd;
}
.wrapper {
    border-radius: 20px;
    padding: 35px 40px;
    background: #141414;
}
.wrapper header {
    color: #b2b2b2;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
header h2 {
    font-size: 1.6rem;    
}
header .column {
    display: flex;
    align-items: center;
}
header .column span {
    font-weight: 500;
    margin-right: 15px;
    font-size: 1.19rem;
}
.volume-slider input {
    outline: none;
    accent-color: #fff;
}
.keys-checkbox input {
    width: 60px;
    height: 30px;
    outline: none;
    cursor: pointer;
    position: relative;
    appearance: none;
    border-radius: 30px;
    background: #4b4b4b;
}
.keys-checkbox input::before {
    content: "";
    height: 20px;
    width: 20px;
    top: 50%;
    left: 5px;
    border-radius: inherit;
    position: absolute;
    background: #8c8c8c;
    transform: translateY(-50%);
    transition: all 0.3s ease;
}
.keys-checkbox input:checked::before {
    left: 35px;
    background: #fff;
}
.piano-keys {
    display: flex;
    margin-top: 40px;
}
.piano-keys .key {
    cursor: pointer;
    user-select: none;
    list-style: none;
    color: #a2a2a2;
    position: relative;
    text-transform: uppercase;
}
.piano-keys .black {
    width: 44px;
    height: 140px;
    z-index: 2;
    margin: 0 -22px 0 -22px;
    border-radius: 0 0 5px 5px;
    background: linear-gradient(#333, #000);
}
.piano-keys .black.active {
    box-shadow: inset -5px 5px 20px rgba(255, 255, 255, 0.1);
    background: linear-gradient(to bottom #000 ,#434343);
}
.piano-keys .white {
    width: 70px;
    height: 230px;
    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 span {
    position: absolute;
    bottom: 20px;
    width: 100%;
    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;
  }
}
@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;
  }
}