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

.keyboard {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
  padding: 20px;
  box-sizing: border-box;
}

.row {
  display: flex;
  flex: 1;
  justify-content: center;
}

.row.offset-1 {
  padding-left: 5%;
  padding-right: 5%;
}

.row.offset-2 {
  padding-left: 10%;
  padding-right: 10%;
}

.row.offset-3 {
  padding-left: 15%;
  padding-right: 15%;
}

.key {
  display: flex;
  justify-content: center;
  align-items: center;
  flex: 1;
  text-align: center;
  padding: 0px;
  color: black;
  border: 1px solid #777;
  user-select: none;
  font-size: clamp(16px, 4vmin, 80px);
}

.key+.key {
  border-left: none;
}

.numbers .key {
  background: #ddd;
  margin-bottom: 5vh;
}

.row1 .key {
  background: #eee;
}

.row2 .key {
  background: #eee;
  border-top: none;
}

.row3 .key {
  background: #eee;
  border-top: none;
}

.row4 .key {
  background: #ddd;
  margin-top: 5vh;
}

.xkeyboard {
  gap: 1vmin;
}

.xrow {
  gap: 1vmin;
}

.xkey {
  border-radius: 8px;
}

/*  key highlights */
.key.lit {
  background: #efd !important;
  color: #000;
  transition: background 0s;
}

.key {
  transition: background 0.5s;
}