body {
  margin: 0;
  padding: 0;
  background: linear-gradient(to right, darkblue, blue, #00aaff);
}

.container {
  display: flex;
  margin-top: 20px;
  justify-content: center;
}
.visor {
  grid-column: span 4;
  grid-row: span 2;
  background-color: lightyellow;
  font-size: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: end;
  padding: 15px 10px;
  border: 1px solid black;
  border-radius: 6px;
  word-wrap: break-word;
  overflow-y: auto;
}
.row1 {
  color: #555;
}
.row2 {
  font-size: 2.5rem;
  font-variant: small-caps;
}
.numbers {
  display: grid;
  grid-template-columns: repeat(4, 80px);
  grid-template-rows: repeat(7, 70px);
  gap: 12px;
  border: 2px solid black;
  border-radius: 6px;
  box-shadow: 8px 6px 6px black;
  padding: 20px;
  background-color: lightgrey;
}

.btn {
  border: 1px solid black;
  border-radius: 6px;
  background-color: black;
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 3px 3px 1px #666;
}

.btn:active {
  transform: translateY(4px);
  box-shadow: 0 0 0;
}
.btn:hover {
  background-color: rgb(200, 200, 200);
  color: black;
}
.btnActiveKeyboard {
  transform: translateY(4px);
  box-shadow: 0 0 0;
}

.col-span-2 {
  grid-column: span 2;
}
.row-span-2 {
  grid-row: span 2;
}

@media (max-width: 480px) {
  .container {
    margin: 0;
  }
  .numbers {
    margin: 0;
    width: 100vw;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(7, 70px);
  }
}