.virtual-keyboard {
  max-width: 400px;
  margin: 0 auto;

  font-size: 1.5rem;
}

.virtual-keyboard .numbers {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.virtual-keyboard .numbers > div {
  min-width: calc(100% / 3 - 5px);
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  padding: 5px;
  border-radius: 3px;
  background-color: rgb(168, 168, 168);

  cursor: pointer;
  box-shadow: #838383 0px 1px 7px;

  transition: opacity 0.2s;
}

.virtual-keyboard .numbers > div:hover {
  opacity: 0.9;
}

.virtual-keyboard .numbers > div.back {
}

.virtual-keyboard .numbers > div.enter {
  background-color: rgb(136, 209, 102);
}

.virtual-keyboard .space {
  text-align: center;
  box-sizing: border-box;
  padding: 1rem;
  background-color: rgb(168, 168, 168);
  margin-top: 5px;
  border-radius: 3px;
  cursor: pointer;
  box-shadow: #838383 0px 1px 7px;
  transition: opacity 0.2s;
}

.virtual-keyboard .space:hover {
  opacity: 0.9;
}

@media screen and (min-width: 768px) {
  .virtual-keyboard {
    display: none;
  }
}