body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #f0f0f0;
  margin: 0;
  font-family: Arial, sans-serif;
}

ul {
  margin: 0;
  padding: 0;
}

li {
  margin:0;
  padding:0;
  list-style:none;
  position:relative;
  float:left
}

.key {
  position: relative;
  float: left;
  width: 40px;
  height: 150px;
  background-color: white;
  border: 1px solid #999;
  border-radius: 0 0 5px 5px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  transition: background-color 0.1s ease;
}

.key.black {
  top: 0;
  width: 30px;
  height: 90px;
  background-color: black;
  margin-left: -15px;
  margin-right: -15px;
  z-index: 1;
  border-radius: 0 0 3px 3px;
}

.key:active {
  background-color: #ccc;
}

.key.black:active {
  background-color: #555;
}

.key.selected {
  background-color: lightblue;
}

.key.selected.key.black {
  background-color: rgb(113, 181, 221);
}

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

@media (orientation: portrait){
  .lg-screen {
    display: None;
  }
}

button {
  margin-top: 10px;
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  background-color: #2e88d3;
  color: white;
  border: none;
  border-radius: 5px;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #007286;
}

#replay-button {
  background-color: #999;
}