* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html,
body {
  height: 100%;
  width: 100%;
}
main {
  height: 100%;
  width: 100%;
  background-color: #c1c1c1;
  font-family: "Poppins", sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
}
.piano {
  width: 80%;
  height: 380px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  user-select: none;
}
.piano div {
  background-color: #fff;
  width: 4.7619047619%;
  height: 100%;
  display: flex;
  align-items: end;
  justify-content: center;
  padding-bottom: 12px;
  border: 1px solid #111;
  font-size: 18px;
  cursor: pointer;
  text-transform: uppercase;
  box-shadow: 0px 8px 5px 0px rgba(0, 0, 0, 0.75);
  -webkit-box-shadow: 0px 8px 5px 0px rgba(0, 0, 0, 0.75);
  -moz-box-shadow: 0px 8px 5px 0px rgba(0, 0, 0, 0.75);
}
.piano div:active {
  box-shadow: none;
  margin-top: 10px;
}
.sec-con {
  width: 100%;
  position: absolute;
  left: 0;
  top: 0;
  display: flex;
  justify-content: center;
}
.sec-con section {
  display: flex;
  width: 85%;
  justify-content: center;
  align-items: center;
  height: 250px;
  gap: 10px;
}
.sec-con section div {
  background-color: #000;
  width: 6.7619047619%;
  height: 100%;
  display: flex;
  align-items: end;
  justify-content: center;
  padding-bottom: 12px;
  font-size: 18px;
  cursor: pointer;
  color: #fff;
  text-transform: uppercase;
  box-shadow: 0px 8px 5px 0px rgba(0, 0, 0, 0.75);
  -webkit-box-shadow: 0px 8px 5px 0px rgba(0, 0, 0, 0.75);
  -moz-box-shadow: 0px 8px 5px 0px rgba(0, 0, 0, 0.75);
}

@media (max-width: 900px) {

  main {
    height: 100vh;              
    overflow-x: auto;
    overflow-y: hidden;

    display: flex;
    align-items: center;        
    justify-content: flex-start;
    padding: 0 16px;            
  }

  .piano {
    width: max-content;
    min-width: 900px;
    height: 260px;

    box-sizing: content-box;
  }

  .sec-con section {
    height: 170px;
    gap: 6px;
  }

  .piano > div {
    font-size: 14px;
  }

  .sec-con section div {
    font-size: 12px;
  }

  main::-webkit-scrollbar {
    display: none;
  }
}